Tag Archives: china roller chain links

China 925 Sterling Silver 8MM VVS D Color Iced Out Hip Hop Jewelry Moissanite Rope Chain roller chain attachment links

Jewellery Primary Material: silver, sterling silver/brass
Material Kind: Sterling Silver
Diamond condition: Spherical Excellent Lower
Pearl Kind: none
Gender: Women’s, Men’s
Primary Stone: moissanite diamond
Jewellery Kind: NECKLACES
Necklaces Kind: Chokers Necklaces
Celebration: Anniversary, Engagement, Gift, Marriage ceremony, Celebration
Certification Kind: 3rd Social gathering Appraisal
Chain Type: Hyperlink Chain
Plating: Gold Plated, Rhodium Plated, Rose Gold Plated
Shapepattern: Skeleton
Type: Hiphop, Iced out/Micro pave moissanite
Religious Variety: Other
Inlay engineering: Micro insert
Eco-pleasant: of course, no nickel and lead
Brand: Engraved Emblem
Go CZPT tester: sure
Packing: PP bag
OEM/ODM: Accepted
Stone: substantial high quality 5A zircon
Supply time: 4-5 times by fedex
Packaging Details: Rope Chain1. 1pcs in a opp bag, twelve pcs in a big opp bag.2. outdoors with bubble bags4mm CZ CZPT tennis chain for men

Firm Profile Shining Jewellery is direct manufacturers of higher top quality sterling silver jewelry, brass jewellery, stainless metal jewellery. From jewelry stones generation, generating jewellery molds, casting, sprucing to plating, HIAORS Pocket Bicycle 25H 65T Rear Wheel Chain Sprocket for 47cc 49cc Electric Bike Moped Scooter Bike we manage every method action to guarantee good top quality before cargo.We benefit customers’ comments and wanna make cooperation with every single buyer, therefore no issue massive or tiny customers, all orders welcome as long as we can grow larger and larger together to make more mutual revenue. personalized produced jewelry phase 1. CZPT jewellery produces and sends the client a CAD image in 48 hrs, The client should then verify that the CAD graphic is totheir liking, or request any adjustments. A cost-free ring sizer to validate the customer’s dimension can be despatched CZPT request.2. CZPT jewelry creates and procedures the jewellery (this usually requires 7-10 business times).3. CZPT jewelry sends images of the concluded jewellery for the customer’s last acceptance by way of email4. CZPT jewelry ships the jewellery (shipping and delivery normally will take 3 – 5 business days),5. The jewellery is acquired by the consumer. Products Description

Product identify925 Sterling Silver 8MM VVS D Shade Iced Out Hip Hop Jewelry Moissanite Rope Chain
SubstanceSterling silver/moissanite
Stonehigh high quality CZPT moissanite diamond
Chain width customized produced
Chain duration custom created
Bracelet durationcustom manufactured
PackingInner packing:1 piece for every OPP bag Outer packing: plastic bubble paper and regular export carton
Paymentthirty% prior to generation, 70% before shipment by T/T Paypal or west union
DeliveryDHL, UPS, FEDEX, TNT, EMS, by air ,by sea
Sample direct time3–15 days.
Income ProviderPhone/ : 1385718086
Wechat ID : or kingicejewelry
Consumer Opinions Product Procedure Why pick us ? Why Select Us to be Lengthy Phrase Companion?one. Custom made layout inside forty eight several hours give you CAD.2. No Moq on custom made piece begin from 1 pcs.3. Place personial Symbol start from 1 PCS.4. Introduce you obtainable consumers.5. Professional customized most sophisticated types, Push Shaft Heart Help Bearing 5161435AA for Chrysler three hundred Dodge Challenger Charger make it as lovely as you want. 6. Send out complete white background picture to the client who purchased from us.7. Hand environment 5A CZ or Diamonds of customized designs as an alternative of wax placing !!! Item packaging FAQ 1.Q: What sort of customized layout you can make?A: We can make numlber, alphabet, animal and other condition types. Not only do basic,also most complicated patterns. 2.Q: What minimum get amount of personalized design and style begin?A: No Moq on custom made piece commence from 1 pcs! 3.Q: Could you do wholesale buy of my custom made style?A: Yes, we also welcome wholesale order of customized design and style. 4.Q: Do you make CZPT pendant?A: Yes, we can make personalized CZPT jewelry, you should enable us know what degree of CZPT you want. 5.Q: Could I send you diamonds to make my items?A: Positive, our income will let you know our deal with and then you can send it to us before creation. 6.Q: How extended to complete the customized pendant?A: The generation time is 2 to 3 weeks, we try out our greatest to make it more quickly and guarantee very best top quality. 7.Q: Can you set the emblem on the customized pendant?A: Of course,we can place your brand on the again of custom made pendant, which includes names, organization emblem, or other logos you like. If you have moreover query, Oil Injected 35cfm 125psi 7.5kw 10hp 8 bar immediate drive screw air compressor remember to make contact with us at any time!

chain

How to choose a roller chain for a conveyor

When choosing a roller chain for your conveyor, the easiest way is to refer to the horsepower and RPM charts. The horsepower and rpm of the small drive sprocket will determine the size and number of teeth of the chain. Conveyor chains are available in a variety of options, including moving products horizontally, vertically, or around a bend radius. When choosing a conveyor chain, consider the purpose of the chain. For example, if you’re delivering products to customers’ doorsteps, you might choose chains that can move products up and down a hallway or warehouse.

Double pitch

Double pitch roller chains are a popular way to drive agricultural equipment. It has twice the pitch of a standard roller chain and is ideal for light-duty drives. Extended pitch increases performance at lower speeds, but requires fewer components per foot than standard single-pitch chains. Compared to single-pitch roller chains, double-pitch chainplates are longer and are suitable for lighter loads. Read on to learn more about double pitch chains and how they can improve your operation.
The most common type of conveyor chain is double pitch. It is used in the auto parts industry, as well as in the precision machinery industry. It is made from the same components as the standard drive roller chain, except it has longer side plates. Double pitch chains are often used on slow-moving conveyors to reduce the stress placed on them. Industries that commonly use double pitch conveyor chains include airport equipment manufacturers, lumber mills, and fruit packing plants.
RS series roller chains are manufactured from high-quality stainless steel. It has excellent chemical and abrasion resistance and is available in a variety of cord lengths. RS sprockets have over 30 teeth. They contain all the necessary connection links for easy installation. PEER Chain offers double pitch roller chain attachments including pre-stretched chains, sprockets, and other attachments.
Double pitch roller chains have several advantages over standard chains. Double pitch chains have double the pitch, making them ideal for conveying applications such as conveyors. In addition to that, it also provides ANSI-compliant styles. These chains also have free connection links. When shopping for a double pitch roller chain, be sure to choose the one that fits your requirements and budget. They will last longer and save you money in the long run.
Double pitch roller chains to ANSI standards feature oversized rollers. These chains are best suited for applications where the product is mounted on top of the chain. They are ideal for agricultural applications where cotton is on top of the drum. Also, this type of chain is used in light-duty conveyors and agricultural applications. You can find double pitch roller chains in a variety of sizes and styles. And, as long as you know what you want, you’ll be happy with the results.

Self-lubricating

Self-lubricating roller chains eliminate the need for manual relubrication, providing long-lasting operation and reducing maintenance costs. These chains are particularly popular in industries such as the food and beverage industry, textiles, printing, and sawmills. They can also replace standard roller chain drives and conveyor chains. Manufactured to the specific standard ISO R606, these chains are ideal replacements for conventional chains. PC chains are particularly beneficial for food and beverage production and packaging applications due to their anti-corrosion properties.
Self-lubricating roller chains meet ISO, ASME/ANSI, and DIN standards. They are interchangeable with standard chains of the same size and shape and can be used in a variety of industrial applications. Self-lubricating chains have special oil-impregnated sleeves to reduce maintenance time. These chains are also suitable for applications where cleanliness is an issue.
Self-lubricating roller chains are manufactured with unique RS attachments. Rather than a traditional roller chain with an external lubricating ring, this type of chain retains the lubricant within its bushings. During operation, the application generates heat, heating the lubricant, which flows out of the pin and bushing area. Therefore, CZPT roller chains are ideal for certain food conveying applications.
In addition to self-lubricating roller chains, carbon steel, stainless steel or nickel-plated steel are also available. Self-lubricating roller chains are available in different sizes depending on the application, including 0.375″ wide profile straight-chain, extended pin chain, and four-link. In addition, these chains are also available in ANSI and BS chain specifications.

Accumulation

Whether you need to move large or small loads, accumulating roller chains are a viable solution. This chain conveyor is designed with low back pressure to transport large and bulky items with minimal noise. Free-running rollers within the chain help create a smooth build-up surface. These chains are available in a variety of options, including accumulating rollers of different pitches.
The accumulation and release roller chain 14 includes an upper part 15 and a lower part 16. The upper part 15 rests in the upper subspace 28, while the lower part 16 rests on the top side 20 of the profile. As the upper belt 15 rolls around the accumulation roller chain 14, it aligns with the lower chain 16 to form a continuous receiving space. This arrangement allows the accumulation roller chain 14 to rest on the top surface of the support profile 11.
A cumulative roller chain consists of many individual parts. Each section of the chain has an elongated cylindrical shape and is connected to each other by hinged joints. Each chain section also has an accumulation and release roller associated therewith. Each roller protrudes from the upper side 20 and the lower side 21 of the chain portion. The accumulation rollers are movable about an axis 22 extending transversely to the longitudinal axis of the chain.
A feature of the stacking and releasing roller chain is its simplicity. The conveyor has a profiled section that is permanently divided into two cross-sectional spaces. The bottom space is closed from all sides. The upper space accommodates the conveyor line. The contoured portion includes an opening that guides the bottom strap. A shunt can also be inserted between the two sections. The accumulating roller chain system is a convenient and versatile way to move bulky items.
There are many different types of accumulating roller chains. Some chains have offset rollers for optimal load distribution. Others have protection to prevent machine wear. Some run without lubricant, which is a safety advantage. In addition to protection, cumulative chains can also provide protection. The side bow version of the accumulation and release roller chain with offset accumulation and release rollers is designed for conveyor systems with very small bend radii.
chain

Without bushing

Bushless roller chains are the most common type of industrial chain. They are simple in design and require only regular maintenance. Regular maintenance includes lubricating, assessing wear, and replacing worn sprockets. For more information, please read the following information:
The outer chainplates and the inner chain plates are alternately arranged in pairs. The connecting pin extends through the hole in the inner link plate. The rollers thus positioned can be rotated on the connecting pins. Oil provided between the outer circumferential surfaces of each connecting pin serves to lubricate the chain. This system reduces noise and wears caused by collisions between inner chain plates and sprockets.
Compared to traditional roller chains, bushings roller chains have rollers around the bushing. These rollers are in rolling contact with the sprocket teeth, providing low friction and excellent wear resistance. To ensure smooth operation, bushings roller chains must be greased to prevent rust and keep the chain properly tensioned. Lubricated chains run smoother and last longer.
In a bushingless chain, the inner links are shaped like half bushings and ride on the rollers. The pins go through the outer plate and connect the inner links to the rollers. The outer plates overlap the inner links and open the pins. This system is also known as a heterochain. This type of chain is more common than traditional roller chains. If you are not sure which type of bushingless roller chain to choose, you may need to purchase an additional pair of inner chainplates.
Linerless roller chains may also include chain guides. In a bushingless roller chain, the outer and inner link plates conform to the surfaces of the guide rails. Thus, the large area of contact between the chain and the guide rail is eliminated, the friction loss is reduced, and the power transmission efficiency is improved. These properties make bushless roller chains more efficient and durable than traditional roller chains. It’s also less noisy. If you are looking for a chain with a lower noise level, a bushingless roller chain may be the right choice for you.

China 925 Sterling Silver 8MM VVS D Color Iced Out Hip Hop Jewelry Moissanite Rope Chain roller chain attachment linksChina 925 Sterling Silver 8MM VVS D Color Iced Out Hip Hop Jewelry Moissanite Rope Chain roller chain attachment links
editor by Cx 2023-06-26

China factory Motor Parts/Motor Kit with Chain and Sprocket (428) roller chain attachment links

Product Description

1)Type motorcycle chain
2)Materials A class steel 
3)Chain No. 428
4)Warranty 30000KMs
5)Process Sand blasting,
heat treatment, 
High speed impact,
Four sides riveting, 
Pre-stretching and running, 
Lubricate with grease.
6)MOQ 1000Pcs
7)Supply Ability 1000000 Meter/Meters per year
8)Tensile Strength/Hardness standard or above
9)Delivery Time within 30 days after receiving your 30% deposits
10)Payment Terms L/C,T/T
11)Packing chains packing in standard export carton, also can packing as your requirement

Our Services

Pre-sales:
1. OEM &ODM service
2. Any of your kind inquiry would be replied within 24 hours.
3. Complete product information will be offered
4. Free sample will be sent if you need .
5. Any other reasonable requirements as per requested
 
During production ,we provide:
1. Schedule of production
2. Mass production picture will offered
3. Any other reasonable requirements as per requested
 
Finish production:
1. Courier tracking number
2. Documents you need 
3. Protection of your sales area, ideas of design and all your private information.

FAQ:

Q1: Do you inspect the finished products?
A: Yes, each step of production and finished products will be carried out inspection by QC departing before shipping.
Q2: What’s the warranty of your products?
A: Usually we guarantee one year after delivery date, but depending on the specified product.
Q3: Are you manufacturer or Trade Company?
A: Both we are. We have been in motorcycle parts for nearly 20 years.
Q4: How to visit factory?
A: Leave us a message, and we will pick you up by car for free.
Q5: Can you do custom logo on the chain?
A: Yes,we can do custom logos by molding. Need your Authorization Letter.

Type: Chain
Material: Steel
Certification: ISO9001：2001
Number of Row: Single Row
Surface Treatment: Sand Blasting, Oiling
Thickness: 1.6mm
Samples:
US$ 0/Piece
1 Piece(Min.Order)

|
Request Sample

Customization:
Available

|

Customized Request

chain

What is a drive chain?

A drive chain is a wheeled device that transmits power from one gear to another. The drive chain is usually an oval ring around a corner or worm gear. On the other hand, idler pulleys do not transmit power and are not used to move the chain. In some cases, drive chains can be used with idler pulleys to transport objects. This allows the drive chain to recover some power from the second gear.

conveyor chain

There are many types of conveyor chains to choose from. One type is a closed joint chain. It consists of the barrel and connecting rod, made from a single casting and heat-treated for high strength and durability. Conveyor chains typically have low running speeds and are typically made of malleable iron. Another type of chain is the power transmission chain, which is used to transmit mechanical power. They feature efficient lubrication and are stronger than conventional conveyor chains.
Roller chain pitches can range from half an inch to a third of an inch. They are available in steel and nickel-plated steel. They can be used with inline or staggered rollers and can be designed with different pitch levels. They can also have bushings between the chainplates or gaps between the teeth to increase their maximum spacing. When choosing a conveyor chain, remember to properly lubricate bearing surfaces to minimize power absorption, wear, and corrosion. Mineral oils of medium viscosity are suitable for normal operating temperatures. SAE 20W50 is suitable. Manufacturers also offer self-lubricating chains.
Conveyor chains are used in many industries. The automotive industry has traditionally used these chains for bulk transport. Their reliability and low cost make them an excellent choice for a variety of applications. CZPT Chains offers stainless steel and CZPT conveyor chains to meet your unique requirements. If you’re in the market for a new conveyor, don’t forget to shop around. CZPT Chain can help you find the perfect one.
The regular drive version consists of an ASME/ANSI roller chain wrapped around a driven sprocket. It can also be configured for variable rpm. The gear ratio between the two parts determines the reduction or increase in speed. In some cases, solution chains can be used. Roller chains are more efficient. Then, there are solutions for both cases. There are many types of conveyor chains to choose from.
Conveyor chain pitch also plays an important role in performance. The smaller the pitch of the chain, the faster it spins. On the other hand, a smaller pitch will require more teeth on the sprocket, which means more links will be engaged during the movement. This smaller articulation angle also produces smoother motion. It also reduces vibration. Therefore, CZPT Chains can be trusted for a long time.

roller chain

The performance of a drive chain depends on how well it is maintained and lubricated. Careful attention to detail is required when selecting a roller chain, which is one of the most important components in a drive chain. Its proper lubrication and assembly will significantly affect its wear life. Here are some important tips to follow when buying a roller chain:
The size of the drive chain should be selected according to the sprockets used. The large sprocket should have at least 25 teeth, and the small sprocket should have fewer teeth. The pitch of a drive chain is the contact angle between the chain and the sprocket. The smaller the sprocket, the smaller the contact angle of the two parts. Larger sprockets are better, but smaller sprockets must never have fewer teeth.
When purchasing a roller chain, be sure to consider the maximum speed of the small sprocket. This will determine how much lubrication you need. Different lubrication systems have different requirements. Manual lubrication limits how many feet per minute the drive chain can run, while oil bath lubrication can get you up to 1100 ft/min. The only way to maximize drive chain speed is to purchase a pump lubrication system.
Once you have the right length, you can determine if you need a new one. To do this you have to move the axis to measure the length. Once the length is determined, the drive chain should be removed from the sprocket and measured using the ANSI specified measuring load. You should also follow safety guidelines when measuring your chain. If you want to maximize the life of your drive chain, be sure to follow these tips.
Another important consideration is the type of environment you operate in. For applications that need to avoid rubbing steel rails, it is best to use a roller chain that can withstand a clean indoor environment. Although roller chains are generally more durable, they must be stored properly to avoid corrosion. If you care about the environment, consider opting for double chain. Its durability and low maintenance costs will make it a valuable investment in your business.

closed pivot

Closed-end pivot drive chains are used in a variety of applications. They are known for their durability, high strength, and long life. They are available in a variety of grades, including grade 400, grade 600, and grade 800 pivots, which can withstand the high forces required for certain applications. Enclosed pivot chains can be used to lift, pull, convey and transfer heavy loads.
Class 400 closed-end pivot chain features one-piece cast offset link construction. Steel pins connect each link and are prevented from rotating by head stops. This design allows the pin to connect inside the barrel without breaking. This type of chain is the most commonly used and has the highest durability. In addition to being extremely durable, it offers long-lasting performance and smooth operation.
Another closed-end pivot conveyor chain drive is called a power drive chain. These chains consist of barrels and links used to transmit rotation from one shaft to another. The barrels of the closed-end pivot chains are made of steel, which allows them to run easily on the sprockets. Block drive chains are used for low-speed applications, but they can be noisy when the chain is in contact with the sprockets.
The enclosed pivot drive chain has rollers on both ends to minimize wear. These chains are usually made of steel and can be used in areas where high-speed power transmission is required. They are also available in heavy-duty versions. Unlike other types of chains, steel pivot chains are designed for a variety of applications. They are suitable for heavy-duty applications and their open barrel design allows for minimal contact with the pins in the barrel and the root of the sprocket.
chain

Linear chain

CZPT is an important part of linear drive technology. This type of chain is capable of delivering real power in tight spaces. Typically, loads are moved by pulling or pushing. CZPT can perform both types of movements. They can push and pull additional loads. This type of chain can also be wound and stored in the magazine. It is a popular choice for small machine tools and many other uses.
Unlike traditional mechanical chains, CZPT uses a push-pull strategy to move heavy objects. It is a rigid locking design that prevents kinking and allows the chain to transmit force without bending. The CZPT is an excellent choice for moving large loads and is particularly versatile in power transmission. However, CZPT is more expensive than traditional drive chain options.
The service life of a linear chain depends on its design, material type and size. You may want to buy a good quality chain, but it’s not necessary in all cases. While superior quality can extend the life of the chain, it may not be necessary for low-speed drives or very light shock loads. If you’re not dealing with high-velocity shock loads, you probably don’t need features like oil reservoirs or bushing grooves.
The size of the drive sprocket can have a major impact on the overall life of the linear chain. It determines how fast the chain can go and how much horsepower it can produce. An 11-tooth chain will hit about half its rated speed, but only about 30 percent of its rated horsepower. You can extend the life of your linear chain by choosing a drive sprocket with a higher number of teeth. It is best to choose a drive sprocket with a high number of teeth, but make sure the number of teeth is even. This will ensure that your chain wear is evenly distributed.

China factory Motor Parts/Motor Kit with Chain and Sprocket (428) roller chain attachment linksChina factory Motor Parts/Motor Kit with Chain and Sprocket (428) roller chain attachment links
editor by CX 2023-05-16

China Excavator Track Chain Track Link R912hdsl Litronic Track Link Assembly  5608117 roller chain attachment links

Product Description

Excavator Track Chain Monitor Url R912HDSL LITRONIC Track Link Assembly     5608117

Key phrase:   Track Chain
                   Track Url Assembly
                   Track Shoes 
                   track shoe assembly

>>Suitable with the subsequent machinery:

Scenario

9040      

LIEBHERR

R912HDSL LITRONIC R926LC R926NLC R926SLC
R926WLC R932HDSL LITRONIC 3001-3205 R934HDS LITRONIC R934HDSL LITRONIC

SUMITOMO-LINKBELT

LS3400C      

 

>>CROSS REFERENCE (Original codes):

BERCO KM3807/52
BERCO KM782/52
BERCO LH1075/52
Scenario 151529A1
DAEWOO 2272-6202
ITM E15698B1M00052
ITM E45718C0Y00052
ITM E40600A0Y00052
LIEBHERR 5608117
LIEBHERR 5615047
SUMITOMO KBA0560
VPI VKM782/52HDV

 

>>Excavator Observe Chain Keep track of Url R912HDSL LITRONIC Keep track of Website link Assembly     5608117

>>>Production Line Display

>>> Excavator undercarriage areas Item demonstrate

>>>Package & Service

 

>>>Delivery variety & time

1.International Courier, This sort of as DHL, TNT,UPS or Fedex.

2.By air/By sea

Products completely stocked, timely and productive delivery.

>>>Contact us
 

Jack
—————-
Trade Manager

QINDING Machinery & Resources (ZheJiang ) CO., LTD.
Insert: No. 100, CZPT Street, HangZhou Town, ZheJiang Province, China

QINDING Producers a vast range of Undercarriage Elements & Elements including:

  • Observe Chains (Normal, Large Obligation & “PPR” Series)
  • Solid and Solid Push Segments
  • Generate Sprockets
  • Idlers
  • Decrease Rollers
  • Carrier Rollers
  • Observe Tensioning Assemblies and Components
  • Heavy Responsibility Forestry Roller and Idler

US $300-1,500
/ Piece
| 		1 Piece

(Min. Order)

###

Application: Excavator
Certification: CE, ISO9001: 2000
Condition: New
Excavator Undercarriage Parts: Track Chain, Track Link, Track Shoes Assembly
Machinery Model: R912hdsl Litronic
Quality: High Quality with Cheap Price

###

Customization:
Available

|

Customized Request

###

9040      

###

R912HDSL LITRONIC R926LC R926NLC R926SLC
R926WLC R932HDSL LITRONIC 3001-3205 R934HDS LITRONIC R934HDSL LITRONIC

###

LS3400C      

###

BERCO KM3807/52
BERCO KM782/52
BERCO LH1075/52
CASE 151529A1
DAEWOO 2272-6202
ITM E15698B1M00052
ITM E40208C0Y00052
ITM E40600A0Y00052
LIEBHERR 5608117
LIEBHERR 5615047
SUMITOMO KBA0560
VPI VKM782/52HDV

###

Excavator Track Chain Track Link R912hdsl Litronic Track Link Assembly 5608117 Jack
—————-
Trade Manager

QINDING MACHINERY & TOOLS (SHANDONG) CO., LTD.
Add: No. 100, Lingong Road, Linyi City, Shandong Province, China
US $300-1,500
/ Piece
| 		1 Piece

(Min. Order)

###

Application: Excavator
Certification: CE, ISO9001: 2000
Condition: New
Excavator Undercarriage Parts: Track Chain, Track Link, Track Shoes Assembly
Machinery Model: R912hdsl Litronic
Quality: High Quality with Cheap Price

###

Customization:
Available

|

Customized Request

###

9040      

###

R912HDSL LITRONIC R926LC R926NLC R926SLC
R926WLC R932HDSL LITRONIC 3001-3205 R934HDS LITRONIC R934HDSL LITRONIC

###

LS3400C      

###

BERCO KM3807/52
BERCO KM782/52
BERCO LH1075/52
CASE 151529A1
DAEWOO 2272-6202
ITM E15698B1M00052
ITM E40208C0Y00052
ITM E40600A0Y00052
LIEBHERR 5608117
LIEBHERR 5615047
SUMITOMO KBA0560
VPI VKM782/52HDV

###

Excavator Track Chain Track Link R912hdsl Litronic Track Link Assembly 5608117 Jack
—————-
Trade Manager

QINDING MACHINERY & TOOLS (SHANDONG) CO., LTD.
Add: No. 100, Lingong Road, Linyi City, Shandong Province, China

What is a roller chain?

What is a roller chain? A roller chain is a transmission system that transmits power from one shaft to another. Internal lubricant helps chains last longer and are interchangeable. Chains are usually made of carbon or alloy steel. Stainless steel is sometimes used in food processing machinery or in environments where lubrication is problematic. Brass and nylon are also sometimes used. If you need to slow down the machine, nylon chains can be used.

Roller chains are used to transmit power from one shaft to another

Generally speaking, the life of a roller chain is limited by three main factors: wear, corrosion, and fatigue. These can be minimized by following some simple guidelines. For optimum performance, the roller chain must be lubricated. Proper lubrication reduces friction and extends product life. Remember that corrosion and wind resistance can adversely affect lubrication, so protect the product properly.
A chain is a mechanical device used to transmit power from one shaft to another. The chain consists of a series of steel plates called bushings. Bushings are attached to the roller chain by pins or bushings. The block and bushing are held together by pins or bushings C riveted to the outer link D. The chain is also attached to the sprocket and bucket by pins or hooks. Chain pitch is measured between hinge centers, usually denoted p.
There are three types of chains: single-strand standard series, multi-strand standard series, and silent chain. Single strand chains are the most common type and cover a wide range of drive loads. Multi-strand chains provide greater power capacity without increasing chain pitch or line speed. An inverted tooth chain is a variant of a single-strand chain that eliminates the noise caused by pitch-related friction.
The inner and outer plates of the roller chain drive are made of steel. The rollers are positioned evenly between the chain links and are fastened to the sprockets. In addition, the rollers can rotate freely within the bushing. The chain links are arc-shaped and mesh with the sprocket teeth to transmit power through the chain.
Chain drives are another common way of transmitting mechanical power. These are the simplest forms of power transmission and are used on conveyor belts and other low-speed applications. The chain wraps around the sprocket and passes through the sprocket whose teeth mesh with the links. This mechanism transfers mechanical power from one shaft to another, increasing speed.
chain

They are interchangeable

There are many different types of roller chains, but most are made of steel. Although they have their own advantages and features, they are generally interchangeable. You can buy different kinds of roller chains from domestic and foreign manufacturers, and you can choose the one that best suits your needs. Bearing Services can help you choose the right bearing for your application needs and budget. Here are some important things to consider before buying a roller chain. Here are some tips to make it easier for you to buy the right type of chain.
When choosing the right roller chain, be sure to consult the available size charts. Depends on how much chain you need to move the load you need to move. Remember that roller chains can be manufactured to fit a variety of machines and must meet your specific needs. Also, the chain should be long enough for the machine you are using. Make sure to buy a chain made of high-quality materials.
Double pitch roller chains have a flat top surface and are used in many different conveying applications. Double-pitch load-carrying roller chains, also known as oversized roller double-pitch chains, have rollers that extend beyond the sidebars to carry products. Double pitch drive series roller chains are used in elevators, long conveyor drives, agricultural machinery, and commercial sprinkler systems.
The tensile strength of a roller chain is a key factor to consider before purchasing a chain. The tensile strength of a chain is a function of the maximum force the chain can withstand before breaking. The three different types of tensile strength represent the force a chain can withstand without breaking. Each chain also has different strengths that can determine the type of chain you need.
The outer and inner links of the roller chain are designed for bearings. This allows the chain to be paired or unpaired with its internal links. The outer link has a pin, and the inner and outer pins are press-fit into the connecting plate. These links are usually made of steel and have a tensile strength of about 20 times their weight. The fatigue strength of two-pitch offset links is the same as that of the base chain.

They reduce wear with internal lubricants

In a roller chain, the pins and bushings rotate inside the chain without lubricant on the outside. They are in contact with the teeth of the sprocket and can easily wear out if not lubricated. The plates that connect the links and pivot about the pins can also rub against each other and cause wear. This is where lubricants come in handy. Without lubricant, the bare metal of the plate and bushing would rub against each other.
The lubricant should have the appropriate viscosity to penetrate critical internal surfaces and form an effective oil film. Recommended viscosities are listed in Table 1. Lubricants must be clean and non-corrosive. For roller chains, a good quality non-clean petroleum base oil is sufficient. While defoamers are not required, other additives such as antioxidants and extreme pressure inhibitors may be useful. However, impure oils should be avoided due to the risk of damage.
The shape of the spray head 10 overlaps with a conventional drive chain 12. The drive chain includes a plurality of rollers 24 and roller link plates 26. Each roller includes a roller pin 29 and is connected to a pair of pin link plates 28. Most drive chains have critical wear points on the sides of the roller pins 29. The shape of the spray head 10 prevents overspray onto the central portion of the roller.
In addition to preventing wear, these chains have unique specifications. Manufacturer CZPT requires raw material suppliers to certify that their products meet standards set by the American Society of Mechanical Engineers (ASME). CZPTs do not accept uncertified raw materials. For safety, the machine must be turned off before attempting to measure the chain. After the system is shut down, the measurement process should be completed in accordance with safety procedures.
General spray oil has lubricating properties, but is not as good as other types of chain lubricants. These are typically used for rust protection and include antioxidant chemicals. Generally, they are inexpensive and widely available in retail stores. However, they have the disadvantage of being very penetrating and difficult to apply evenly. Oil cannot stay on the chain as it spins, which can accelerate wear and corrosion.
chain

They can be used to speed up or slow down machines

Typically, roller chains are chains used to move mechanical system components. Unlike belts, roller chains can be used to speed up or slow down a machine. The main difference between belts and roller chains is the lubrication process. Belts use lubrication to help them move at a constant speed, but should not exceed the critical speed of the roller chain. This critical speed is not easy to determine and lubrication is critical to its life.
A roller chain is a chain consisting of a steel bushing that holds the inner plate A and pins C together. Pin C is riveted to outer link D, while roller R surrounds each bushing B. The teeth of the sprocket are supported on the rollers. They spin freely on pins and bushings, reducing friction.
The chains can be single-stranded, double-stranded, or multi-stranded. The rated power capacity of the single strand chain can meet various drive load requirements. Multi-strand chains provide higher power capacity without increasing chain pitch or line speed. The silent chain, also known as the inverted tooth chain, consists of a series of toothed chainplates. The pins of the chain are pressed into the wide ends of the sidebars and outer links.
Although roller chains are a common mechanical component, they can fail under certain conditions. The most common cause of excessive wear is wrong to load sizing. Each manufacturer sets a maximum workload for its product. A chain that is too small for the load carried will not run smoothly and may cause premature failure. Chains can also fail due to rust or improper maintenance.
There are many ways to choose the correct size roller chain. The easiest way to choose the right one is to use a horsepower chart to determine the speed of the motor. RPM will determine the size of the chain and the number of teeth on the drive sprocket. Conveyor chains offer a variety of options to move products horizontally or vertically, even around bend radii.

China Excavator Track Chain Track Link R912hdsl Litronic Track Link Assembly  5608117 roller chain attachment linksChina Excavator Track Chain Track Link R912hdsl Litronic Track Link Assembly  5608117 roller chain attachment links
editor by czh 2023-01-01

China 08b Stainless Steel Heat Resistant Conveyor Grip Chain with ISO9001: 2008 roller chain attachment links

Product Description

08B Stainless Steel Warmth Resistant  Conveyor Grip Chain with ISO9001: 2008
 

Merchandise Description

one. Content: Stainless steel chain / Alloy Carbon Metal
two. Area Treatment method: Zinc-Plated / Nickel-Plated / Dacromet-Plated
three. Quick pitch stainless steel conveyor chain with attachments.
4. Double pitch stainless metal conveyor chain.
five. Double pitch hollow pin chain.
Observe: If you have drawing or samples, we can do the unique conveyor chains.

Product name  Grip Conveyor Chain (08B)
Materials Available  1. Stainless Steel: SS304, SS316, and so on
2. Alloy Metal: 45Mn, 42CrMo, and so on
three. OEM according to your request
Area Treatment Shot peening, Sharpening, Oxygenation, Blackening, Zinc-plated, Nickel-plated, Anodized, and many others.
Attribute Fire Resistant, Oil Resistant, Heat Resistant
Software Mostly utilised in items transmission
Design criterion ISO DIN ANSI & Customer’s Drawing
Dimension Customer’s Drawing & ISO standard 
Package deal Picket Circumstance / Container and pallet, or created-to-buy
Certificate ISO9001: 2008 
Advantage 1st quality, Ideal provider, Competitive value, Fast shipping
Delivery Time 20 times for samples. 45 times for official order.

 

View much more merchandise,make sure you simply click below…
 

Business Profile

US $2
/ Meter
| 		100 Meters

(Min. Order)

###

Material: Stainless Steel
Structure: Conveyor Chain
Surface Treatment: Oil Blooming
Chain Size: Ts635
Feature: Heat Resistant
Sample: for Free

###

Samples:
US$ 0/Meter
1 Meter(Min.Order)

|
Request Sample

###

Customization:
Available

|

Customized Request

###

Product name  Grip Conveyor Chain (08B)
Materials Available  1. Stainless Steel: SS304, SS316, etc
2. Alloy Steel: 45Mn, 42CrMo, etc
3. OEM according to your request
Surface Treatment Shot peening, Polishing, Oxygenation, Blackening, Zinc-plated, Nickel-plated, Anodized, etc.
Characteristic Fire Resistant, Oil Resistant, Heat Resistant
Application Mainly used in products transmission
Design criterion ISO DIN ANSI & Customer’s Drawing
Size Customer’s Drawing & ISO standard 
Package Wooden Case / Container and pallet, or made-to-order
Certificate ISO9001: 2008 
Advantage First quality, Best service, Competitive price, Fast delivery
Delivery Time 20 days for samples. 45 days for official order.
US $2
/ Meter
| 		100 Meters

(Min. Order)

###

Material: Stainless Steel
Structure: Conveyor Chain
Surface Treatment: Oil Blooming
Chain Size: Ts635
Feature: Heat Resistant
Sample: for Free

###

Samples:
US$ 0/Meter
1 Meter(Min.Order)

|
Request Sample

###

Customization:
Available

|

Customized Request

###

Product name  Grip Conveyor Chain (08B)
Materials Available  1. Stainless Steel: SS304, SS316, etc
2. Alloy Steel: 45Mn, 42CrMo, etc
3. OEM according to your request
Surface Treatment Shot peening, Polishing, Oxygenation, Blackening, Zinc-plated, Nickel-plated, Anodized, etc.
Characteristic Fire Resistant, Oil Resistant, Heat Resistant
Application Mainly used in products transmission
Design criterion ISO DIN ANSI & Customer’s Drawing
Size Customer’s Drawing & ISO standard 
Package Wooden Case / Container and pallet, or made-to-order
Certificate ISO9001: 2008 
Advantage First quality, Best service, Competitive price, Fast delivery
Delivery Time 20 days for samples. 45 days for official order.

Different types of drive chains

There are many different types of drive chains. You should be able to differentiate between roller chains, forged rivetless chains, double chains, flat-top chains, and helical chains by the terms used. This article will provide information on the different types of chains. Then, you can choose the right one according to your needs. If you haven’t purchased a chain yet, read this article to get started. It will also provide information on the pros and cons of each type.
chain

roller chain

There are several differences between drive chains and roller chains, but in essence, the two are functionally similar. The choice of which type to use depends largely on the type of environment it will be exposed to. While roller chains are suitable for clean indoor environments, they are not very forgiving when it comes to rubbing against the rails. Following are the main differences between a drive chain and a roller chain. Using the correct drive chain is essential for a smooth and efficient running machine.
Roller chain drive chains come in many different weights and tensile strengths. For light-duty applications, use a smaller pitch chain. For heavy-duty applications, use larger pitch chains. The design simplicity of these chains makes them ideal for a variety of applications. While they are great for a variety of applications, the durability of these chains makes them ideal for a variety of applications. Some of the main uses of roller chain drive chains are listed below.
When replacing the drive chain, be sure to follow the safety guidelines. The most important thing to remember is not to place the chain on a dirty floor as it may cause stretch or damage. After removing the chain from the sprocket, apply the measured load specified by ANSI to it. If the load exceeds this value, the chain may bend. A suitable load for measuring a drive chain should be at least six links.
While roller chains are usually made of carbon steel, some are made of stainless steel and are used in food processing machinery. In these environments, the chain may be made of stainless steel for lubrication. Brass and nylon are also sometimes used to meet these requirements. Regardless of the application, however, choosing the right drive chain is critical to the success of a roller chain machine. It is important to maintain the proper balance between the roller chain and the machine.
To properly use a roller chain, first determine the size of the sprocket used for the drive. The size of the chain should be smaller than the smallest sprocket to prevent tooth interference and provide adequate winding on the smaller sprocket. A good practice is to choose a drive chain with a center distance of 30 to 50 times the chain pitch. The longest possible center-to-center distance is approximately 80 times the chain pitch but is not recommended for high-speed applications.

Drop forged rivetless chain

Drop-forged rivetless drive chains are made of drop-forged steel components. Their proportions are suitable for strength and lightweight. Forged rivetless chains are generally divided into three types. Each of these types has its own set of important specifications. Key topics include minimum ultimate tensile strength, chain length tolerances, and link dimensions. Read on to learn more about each type and its uses.
One of the main features of forged rivetless chains is that, despite their relatively low price, they are designed to be very durable. The quality of a forged chain depends on the structure and design of the chain. The manufacturer of this type of drive chain is CZPT, which has a large stock of these chains. The chain is proof tested after assembly and comes with a two-year parts replacement warranty.
Forged rivetless chains are available in a variety of pitch sizes and strength grades. They are made of cast manganese or alloy steel and have an average strength of 24,000 to 300,000 pounds. These chains are suitable for automotive, conveyor, and material handling as well as meat packaging, sugar processing, and steel mill applications. They are also widely used in conveying systems. To ensure quality and performance, manufacturers offer a variety of forged chains.
CZPT offers forged CZPT drive chains for fatigue-free operation. The chain includes a solid one-piece forged drive pawl for optimum durability. Chains are available in Figure 8 and in D-shape styles. For more information, please contact CZPT directly. Custom Drop-Forged rivetless drive chains can be ordered. Manufacturers also offer custom chains for specific application needs.

double chain

Duplex drive chains have two sets of rollers instead of one, producing twice the power. Double chain roller chains have pins and roller bearings, while triple chain chains have an extra row of plates to accommodate the three sprockets. They are usually interchangeable with each other. They are available for US, UK, and ISO standards. They are made of carbon steel, stainless steel, and nickel or nickel-plated.
chain

flat top chain

Flat-top drive chains are ideal for curved or straight tracks and come in many different types and thicknesses. These chains are highly resistant to wear and are usually made of steel, stainless steel, or plastic. CZPT manufactures special brands of flat-top chains with high wear resistance and excellent noise reduction. In addition to being versatile, flat-top chains can be used in a variety of industrial applications.
There are two main types of CZPT chains: solid top or raised rib. One piece is formed from a single unit link and the other has roller base links for added strength. The two-piece chain combines flat tabletop links and a roller bottom chain for added strength. These chains are available in widths up to 20 feet and are available in a variety of widths. These chains are available in stainless steel, cast iron, or plastic.
The hinge pin is another important part of the flat top chain system. Support chain plate to ensure smooth conveying. The hinges are available in single hinge pin and double hinge pin styles. Standard hinge pins are designed for straight, narrow-width chainplates; double hinge pins are designed for longer, heavier products. The hinge pins also come in many different materials, including aluminum and galvanized steel. This allows for customization based on machine design, operating conditions, and drive method.
Whether your flat-top chain conveyor system is large or small, a high-quality flat-top chain will get the job done. With their low maintenance and low maintenance design, these chains are easy to clean and maintain. They can accommodate workpiece pallets of various sizes, and their flexibility makes them ideal for many different applications. They can also be highly customized for various industries. So if you need an industry-specific conveyor, then a flat-top drive chain is the way to go.

China 08b Stainless Steel Heat Resistant Conveyor Grip Chain with ISO9001: 2008 roller chain attachment linksChina 08b Stainless Steel Heat Resistant Conveyor Grip Chain with ISO9001: 2008 roller chain attachment links
editor by czh 2022-12-16

China factory Standard Roller Chain OL CL Connecting Links with high quality

Applicable Industries: chain transmission
Standard or Nonstandard: Standard
Type: Roller Chain
Material: Stainless Steel
Tensile Strength: Strong
Product name: Roller chain Connecting link
Color: Nature
Application: chain parts
Certificate: ISO9001:2000
Materail: 40Mn
Individual package: Plastic Bag
Packaging Details: Individual package:Plastic Bag
Port: ZheJiang

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Company Information

Packaging & Shipping

Contact Us
FAQ
Q1: Are you manufacturer or trade company?We are chain manufacturer and exporter over 10 years.
Q2:What’s the chain color?Blue , steel nature color ,Black , nickel.
Q3:what’ Factory Direct Sell Auto Drive Shafts Parts for OEM 37526-95710 Center Bearing Set s the production length of chain in usually ? 10fT ,5meters long ,any other length is ok.
Q4.Can I get a sample to check quality before the order ?As usual, we don’t advise to send sample due to cost would be high. But we can offer test reports to check.
Q5.How long about your delivery time ?As usual, Skid Back Plate fit for TERRA JUNXI 3D Gearbox Transfer Case Steel Engine Protection Guard Cars Accessories we can finish normal order with 60~75 days after drawings confirmed.
Q6.What is your minimum order quantity ?For non standard chains, our MOQ is 100 meters; and standard chains in stock, about 20 meters is available.
Q7.What terms of payment you usually use?T/T 30% deposit and 70% against document, Western Union, EEP Auto Parts Cv Axle Shaft Right Drive Shaft FOR CZPT COROLLA ZRE152 1.8 2007-2014 43410-02610 L/C at sight.

How to choose a drive chain

The process of manufacturing a drive chain starts with bushing. Both inner and outer diameters are strictly measured to ensure tight tolerances. The roundness of the bushing is critical as irregular surfaces in the contact area can cause accelerated wear and shorten chain life. That’s why the CZPT manufacturing process is carefully designed to optimize the wear performance of the chain. There are several types of bushings including roller, forged rivetless, flat top, and timing.
chain

roller chain

The tensile strength of a roller chain is the number of pounds it can withstand before breaking. Fatigue strength is equally important, although the two do not necessarily go hand in hand. Fatigue strength depends on several factors, including the quality of steel used in manufacturing, the quality of the pitch holes, the type of shot peening used, and the thickness and design of the link plates. Here are some things to consider when choosing a roller chain for a drive chain.
When sizing a chain, first determine how much power will be delivered. Then, determine how many teeth you need for the drive sprocket. The gear ratio is approximately 2:1. The number of sprocket teeth depends on the size of the motor. A chain with a higher tooth count requires fewer teeth than a smaller chain. The size of the drive sprocket also depends on the horsepower of the motor.
Before installing rollers or conveyor chains, make sure the drive system is properly aligned. If the drive chain is misaligned, the load on other components will be uneven. This can cause excessive wear on the sprocket or roller chain. Also, check that the sprocket is as close to the bearing as possible. Connecting links can be secured using openings or spring clips.
Different manufacturing processes can affect the performance of the roller chain. Some manufacturers have chains pre-installed at the factory to minimize initial stretch. Others build chains by preloading sprockets and ensuring consistent precision heat treatment. The final product may have greater elongation or less wear than previous products. It is best to follow the manufacturer’s recommendations to extend the life of the roller chain. If you are interested in purchasing a new drive chain, please contact a trusted supplier in your area.

Drop forged rivetless chain

Forged rivetless drive chains are ideal for applications where flexibility and strength are critical. The chain consists of forged steel components for high strength and lightweight. These chain assemblies are easy to assemble without the use of tools and are commonly used on carts, assembly lines, and drag conveyors. They are also compatible with related chain, drive, and accessory products. They have a short turning radius and therefore high flexibility and strength.
The X-348 Forged Rivetless Chain is an example of such a drive chain. This chain is perfect for automated machines that run late at night. It is available in a variety of weight limits and sizes. The chain is pre-stressed after assembly, and a two-year parts replacement warranty is standard. Its durability is also enhanced by the inclusion of push dogs that engage the front floating dogs on the leading free cart.
In addition to this type of chain, CZPT also offers a full line of Caterpillar Drive chains. They are designed to provide fatigue-free operation. The drive jaws are one-piece forged induction hardened steel compatible with forged rivetless chains. There are many special custom chains to choose from. These forged chains can be installed on Caterpillars as well as other types of tractors for maximum durability and efficiency.
Distributors of forged chain products offer a variety of sizes, pitches, and materials for material handling and conveying systems. Typically, this type of chain is used in conveyor and lifting applications and ranges from 3 inches to 9 inches. Depending on size and thickness, it is ideal for a variety of industries including automotive, food, paper, and steel mills. In addition, the chain is corrosion-resistant and corrosion-free.
chain

flat top chain

The flat-top drive chain is used for conveying large and medium workpiece pallets. These chains are available in a variety of materials and designs, including plastic, steel, and stainless steel. The steel flat top chain provides high wear resistance and excellent noise reduction. Steel flat-top chains are suitable for applications requiring high loads and excellent workmanship. HD profiles are compatible with steel flat-top chains and are highly recommended for extreme applications.
CZPT produces two types of flat-top chains. Tabletop chains are similar to wing door hinges, while MatTop chains are assembled using full-width pins. Both types are available in standard widths of 3.25 to 12 inches and are shipped in 10-foot sections. Both types can be shaped according to the width of the chain.
Double hinge pin flat-top chains are available with a variety of hinge pins. There are TAB and standard hinge pins for different machines and drive methods. A flat-top chain with dual-hinge pins will provide higher load carrying capacity, but be aware of the hinge pin size and style required for your application. The hinge pins should be long enough to ensure a smooth and smooth delivery. Double hinge pin flat top drive chains are available in a variety of sizes and designs.
Using standardized components and modules, the flat-top chain conveyor system is highly adaptable and can be seamlessly integrated into any production process. It can also be extended to handle a wider range of containers. Using a single drive, the CZPT system can be extended to a length of 40 meters. Its versatility makes it the choice of many industries. There is also a wide variety of flat-top drive chains to choose from.

time chain

The drive chain is a critical component of any internal combustion engine. They transmit the rotation of the crankshaft to the camshaft via the timing chain. These chains have been standard in cars since the turn of the 20th century, and while toothed belts have become a more cost-effective alternative, manufacturers such as Mercedes-Benz and BMW remain loyal to traditional chain drives.
Timing chains come in many shapes and sizes, with different designs depending on the type of load they must carry. Roller chains are the most common and offer an excellent balance of strength and NVH performance. Its design is similar to a bicycle chain, and the inner link consists of two blades pressed into the holes of the sprocket. Roller chains can also pass through smaller diameter sprockets, and roller chains take up less space than chain links.
The length of the chain allows it to stretch over time. In addition, improper oil maintenance can lead to premature timing chain damage. Without an oil change, the chain is not lubricated, causing the rollers and links to rub against each other. This can cause excessive chain wear and eventually chain breakage. To avoid premature timing chain failure, it is advisable to have your vehicle inspected by a mechanic.
For automotive timing chains, the CZPT website offers the best prices for the timing chain you need. You can find the right timing chain for your car by registering on this website. You can also contact a mechanic to get the parts you need. If you don’t know how to diagnose your timing mechanism, you can always check the owner’s manual or the manufacturer’s website. It is critical to follow the manufacturer’s recommendations to avoid catastrophic failure.
chain

Oil-impregnated bushing

Oil-impregnated bushings for drive chains are an excellent solution to drive chain lubrication problems. Usually, drive chains require additional lubrication, but by adding special oil-impregnated bushings, the chain can run without lubrication. Oil-immersed bushings, such as those of the CZPT brand for CZPT, are specially manufactured for this purpose. They capture oil during operation and release it onto the bearing surfaces, returning it to the bushing by capillary action.
Since their introduction to the automotive industry, engineered composite plastic bushings have been shown to provide longer service life and save up to 40% in maintenance costs. They have replaced bronze in thousands of applications, including pumps, medical equipment, and food processing machinery. Because oil-impregnated bronze bearings rely on capillary action, they must rotate to maintain a complete lubricating film. However, several factors prevent this film from fully forming, including low speeds and intermittent use.
During the manufacturing process, oil-impregnated bushings are manufactured to meet the wear resistance requirements of the drive chain. The sintered density of the oil-impregnated sintered bushing determines its mechanical strength. The larger sintered density increases the wear resistance of the oil-impregnated bushing but reduces the mechanical strength.
Whether or not a drive chain is lubricated will determine its overall life. Proper lubrication can extend chain life by 100% compared to a chain without proper lubrication. Proper lubrication means using high-quality oils without additives and oils that flow freely at prevailing temperatures. Indirect heating is required by immersing the drive chain in the molten pool as certain additives prevent oil from entering the chain joint.

China factory Standard Roller Chain OL CL Connecting Links with high qualityChina factory Standard Roller Chain OL CL Connecting Links with high quality