Tag Archives: simplex chain

China manufacturer High Precision Machinery Parts ISO Standard Simplex Transmission Roller Chain 16b agricultural roller chain

Product Description

Product

Standard Double Pitch Roller chain

Material

40Mn steel,304 stainless steel, 316 stainless steel and 201 stainless steel.

Types

Standard chains and special chains, such as A or B series chains, roller chains, driving chains, conveyor chains, hoisting chains, agricultural chains, sprockets, gears, wheels and so on.

Series

 A series(12.7-50.8mm pitches),B series (9.525-50.8mm pitches)and the heavy series.

Short pitch precision roller chain

Simplex Roller Chains&Bushing Chains: 

04C-1,06C-1,085-1,08A-1,10A-1,12A-1,16A-1,20A-1,24A-1,28A-1,32A-1,36A-1,40A-1,48A-1
Duplex Roller Chains&Bushing Chains:

04C-2,06C-2,085-2,08A-2,10A-2,12A-2,16A-2,20A-2,24A-2,28A-2,32A-2,36A-2,40A-2,48A-2
Triplex Roller Chains&Bushing Chains:

04C-3,06C-2,085-3,08A-3,10A-3,12A-3,16A-3,20A-3,24A-3,28A-3,32A-3,36A-3,40A-3,48A-3

Chain link type

Standard links (without attachment) and non-standard links (with attachment).

 

A1: One-side,one hole cranked attachments.
A2: One-side,two holes cranked attachments.
K1: Both-side,one hole cranked attachments.
K2: Both-side,two hole cranked attachments.
D1: One-side,an extended pin on every outer link.
D3: One-side,two extended pin on every outer link.

Our Products Advantage

1. Every step from production order to the packing process has a strict quality inspection.
2. We have standard roller chain with 1.5 CZPT (DIN. ANSI.); Non-standard roller chain (customized acording to customer drawings).
3. Export products with high quality and low price.
4.We have a good service before and after-sale.

1.Fast delivery: Standard products can be delivered in as fast as 20 days
2.Good service: timely reply, prompt quotation, responsible for the product
3.High cost performance: can maintain price stability for a certain period of time, bringing greater profits to customers
4.Good quality: production and testing have corresponding supervision to ensure product quality and get high praise from customers
5.OEM service: products can be customized according to drawings and requirements

We are responsible for the ordered products. We are very confident in the products we produce. Of course, if you have any problems after receiving the goods, you can contact us directly. We will confirm and negotiate in time to solve your difficulties.


 

Standard or Nonstandard: Standard
Application: Textile Machinery, Garment Machinery, Conveyer Equipment, Packaging Machinery, Electric Cars, Motorcycle, Food Machinery, Mining Equipment, Agricultural Machinery, Car
Surface Treatment: Oil Blooming
Structure: Roller Chain
Material: Alloy
Type: Short Pitch Chain
Samples:
US$ 35/kg
1 kg(Min.Order)

|
Request Sample

Customization:
Available

|

Customized Request

chain

Roller Chain Maintenance Tips

There are many things to keep in mind when maintaining a roller chain. The main reasons include friction and external influences. Without proper lubrication and adjustment, such chains will wear prematurely. Here are some tips for keeping your roller chain in top shape. continue reading! This will make your process easier. We will also discuss the cost of the new roller chain. As always, remember to check for loose ends and adjust the chain regularly.

Preloading

Roller chains are designed to accommodate many different types of loads. Sprockets are the main cause of chain wear. Axial and angular misalignment occurs when the sprocket faces are not properly aligned. Both types of misalignment increase stress and wear on the roller chain. They can also negatively affect the drive. Therefore, choosing the right chain is an important consideration.
Preloading helps to eliminate initial elongation and extend service life. The benefits of preloading can be seen in the preloading chart. Significant elongation occurs during drive startup with no or minimal preload. This is due to the surface hardness of the worn parts. On the other hand, a properly preloaded chain shows little elongation during the initial start. Therefore, proper preload can prolong wear life.
Although elongation is a natural phenomenon in any drive, it can be minimized or eliminated with proper maintenance. In addition to regular inspections, you should do a full inspection of your chain after the first hundred hours. This inspection should focus on key life factors such as 3% elongation, how the chain is lubricated, and any other issues that may affect life. A good quality chain should have the longest life and no problems.
There are many different roller chain specifications. A good rule of thumb is to choose chains with at least five links. Then, tighten the chain until a break occurs, and it will tell you what kind of break occurred. Alternatively, you can use a roller chain with the maximum allowable load. As long as the MAL doesn’t exceed that number, it’s still perfectly safe to use it for any application.

lubricating

When it comes to lubrication, there are several different techniques. For example, spray lubrication is a popular method for high-horsepower drives and high-load and fast-moving machines. This method is very effective, but it is expensive, and spraying the chain too far out of the guard can cause leaks. Another common method is brush lubrication. Brush lubrication involves applying a continuous flow of oil to the chain, pushing it into the chain. This lubrication technique reduces the application temperature of the chain. Also, it can extend the life of the chain, depending on the manufacturer’s specifications.
While the lubrication of roller chain couplings varies by application, sprocket hubs should be lubricated monthly to ensure proper sealing. The amount of oil used depends on the rotational speed and the type of roller chain coupling. In general, lubricants used in roller chain couplings should have excellent adhesion, oxidation, and mechanical stability.
Wear-resistant lubricants are recommended. They prevent the rollers from sticking to each other and prevent rusting. These lubricants have low surface tension and are not harmful to metal or O-ring chains. The optimum lubrication method depends on ambient temperature, horsepower, and chain speed. Properly lubricating a roller chain increases the life of the chain and reduces the risk of wear.
Proper lubrication of the roller chain is essential to prevent corrosion and prolong its service life. The oil forms a smooth film on the chain components, reducing metal-to-metal contact and minimizing friction and wear. Additionally, the oil provides a smooth running surface and reduces noise. However, the running-in process of roller chain lubrication cannot be underestimated. When using heavy-duty oils, ensure that the lubricant is compatible with operating and ambient temperatures.

Maintain

To extend the life of your roller chain, you need to carry out regular inspections. First, you should check the T-pin on the link plate at the joint. If they are not connected properly, it can cause the chain to stretch and not maintain proper spacing and timing. Next, you should look for unusual noise, corrosion, and dirt that may indicate wear. If you notice any of these problems, it’s time to replace the chain.
In order to properly maintain a roller chain, both areas of the roller chain must be lubricated with the correct lubricant. Lubricants used should be SAE non-degreased oils. There are several types of lubricants available, but the best one is a petroleum-based oil with a high viscosity. You can also check for signs of wear, such as red or brown discoloration. This means that there is not enough lubrication.
While the life expectancy of a roller chain is unknown, it is important to know how to extend its life and maximize its effectiveness. Improper tension and alignment can shorten its life and place undue stress on the drive system and the chain itself. Incorrect tension can also lead to slippage and increased energy output. Therefore, you should calculate the tension and alignment of the chain during the initial installation. Check and adjust regularly.
Another way to extend the life of your rollers is to thoroughly clean the inside and outside of the rollers. You should also lubricate it frequently to prevent excessive heat buildup. Designed to prevent overheating by limiting the amount of work during break-ins. Additionally, regular inspections will help you catch anomalies early enough to stop operations. Last but not least, regular lubrication will prolong the life of the roller chain.

Cost

Buying a roller chain is a big decision, but initial cost shouldn’t be the only consideration. The cost of the roller chain itself, as well as the running costs, should be considered. Even the lowest-priced chains can be more expensive in the long run. Additionally, maintenance and energy costs may increase. The best roller chain for your business will be the one that best suits your needs. Listed below are some considerations to consider when purchasing a roller chain.
First, what material should you use? Roller chains come in many different materials. Stainless steel is a commonly used material in construction. Materials are selected based on the cost and design of chain horsepower transmission. Various manufacturing processes will determine which material is suitable for your application. Also, the weight of the chain will vary depending on its pitch and the construction technique used. A large part of the cost of a roller chain is on the drive sprocket.
Another consideration is installation cost. Roller chains are commonly used in agricultural and transportation applications, especially for agronomic products. If lubrication is your concern, maintenance-free chains are the best choice. Corrosion-resistant chains are ideal for wet environments. They are sold in boxed lengths, so replacing a longer length requires adding a shorter length. To avoid trouble, use the skateboard to help connect the links.
Another consideration is the overall width. The overall width of an open #40 roller chain may vary but should be at least 10 feet wide. Although it is not the most expensive type of roller chain, it will last longer. Using it correctly will increase its overall longevity, so it’s a good idea to choose it wisely. If your business uses roller chains regularly, the cost reduction is well worth it.
chain

Application

A roller chain consists of a pair of alternating pins and roller links. The pins are pressed into the side panels and hinged to the rollers. Roller chains can be single or multi-strand, connected by a common pin. The multi-strand design provides higher shear strength for demanding power transmission applications. Typical applications for roller chains include conveyors, hoists, and other mechanical equipment.
The horsepower capability of a roller chain is limited by several factors, including pin shock and friction. While research into these factors has placed some limits on the maximum operating speed of the roller chain, practical experience has shown that these systems can be used at higher speeds. Proper lubrication and cooling can increase the durability of these chains. In addition, roller chain applications include:
Drive and conveyor systems are the two main uses of roller chains. During driving operations, wear and elongation are a natural part of the operation. However, lubrication plays a vital role in minimizing wear and shock loads. Therefore, wear is inevitable and special care must be taken to ensure proper lubrication. Additionally, lubrication reduces heat dissipation in the chain.
The materials used to make roller chains vary from one type to another. Stainless steel is common, but nylon or brass are sometimes used. These materials are less expensive and more durable than steel or stainless steel. The best material for the job depends on a variety of factors, including cost, environmental conditions, and design horsepower transmission. For example, the pin bushing contact area is a critical area requiring lubrication. Additionally, some coatings are designed to retard the corrosive effects of water or oil.
China manufacturer High Precision Machinery Parts ISO Standard Simplex Transmission Roller Chain 16b   agricultural roller chainChina manufacturer High Precision Machinery Parts ISO Standard Simplex Transmission Roller Chain 16b   agricultural roller chain
editor by CX 2023-05-16

China Roller chain and sprocket manufacturer 08BHF8 forklift chain rollers in Rajshahi Bangladesh Short Pitch Transmission Precision Roller Chains B Series Simplex with ce certificate top quality low price

China Roller chain and sprocket manufacturer 08BHF8 forklift chain rollers  in Rajshahi Bangladesh  Short Pitch Transmission Precision Roller Chains B Series Simplex with ce certificate top quality low price

We – EPG Group the largest Chain and agricultural gearbox factory in China with 5 distinct branches.

EPG was awarded with “well-known item of Zhejiang Province” and “renowned brand of Zhejiang Province”.ISO EPG is a skilled maker and exporter that is anxious with the style, growth and creation.9001 certified producer of precision roller chains. Types incorporate solitary and a number of strand, hollow pin, side bow, rollerless, self-lubricating, straight sidebar, double pitch, brushed, nickel plated, armor coated, 304 stainless steel, leaf, hoist and O-ring, citrus, sorting and caterpillar roller chains. 1 factor of our software consulting is that we have been accumulating and combining the expertise in chain and sprocket programs in various places for many years. This is specifically fascinating for us whenever consumers method us with some exceeding and demanding requirements. Merchandise Description

08BHF8 Short Pitch Transmission Precision Roller Chains B Sequence Simplex

Stainless Metal Roller Chains,Stainless Steel EPT chain,  Stainless metal chain for bottle conveyor line which is utilised on bottle filling conveyor lines, EPT stHangZhourd ss chain or unique ss chains (SS304 chain, SS316 chains, SS316L chains, SS conveyor chains, SS304 conveyor chain, SS316 conveyor chain) all offered

We have many OEM chain factory customer from Europe and our stainless metal chains top quality is related to the A quality in the entire world

 

We are specialist provider of chains

 

1.Bicycle chains: 408,410,415

two. EPT chains: 04C, 25H, 06C, T3, 270H,415H, 420, 420L, 425, 428, 428H, 520,
525, 530 
three.ASA roller chains: 35, 40, 41, fifty, sixty, 60H, 80, 80H, a hundred, a hundred and twenty, one hundred forty, one hundred sixty, 200, 240
(Catalog) 
4.Chain (British stHangZhourd): 05-B, 06-B, 08-B, ten-B, twelve-B, 16-B, 20-B, 24-B, 28-B,
32-B, 40-B (Catalog) 
five.Massive pitch chain: 100, 100H, a hundred and twenty, 120H, 140, 140H, 160, 160H, one hundred eighty, two hundred, 240

6.Increase-pitch precision roller chain: 208A, 208B, 210A, 210B, 212A, 212B, 216A,
216B, 220A,220B,224A,224B,228B,232B 
7.Roller chains for beer buntline conveyor: CK-70S,CK-100S,CK-100SA,CK-100SC,CK-133XA,
CK-140X, CK-140XA,CK-150X,CK-150S,CK-154X,CK-155X,CK-155XA,CK-160X,CK-160XA,CK-160XB,CK-160XC,CK-165X,CK-165XA, CK-169, CK-180X,CK-180XA,CK-200S,CW-102,CW-127
8.Employ roller chain for conveyors: 81X, 81XH,81XHH,CA550,CA555,CA620

nine.Multi strand sizes offered up to 5 strand, for choose size stHangZhourd attachment available 
10.Chains from 04b~16b are with spring clip, EPT are riveted cottered style
is accessible for measurement eighty to 240

11.Stainless steel chain and nickel plated chains is obtainable special design and style also offered
(i.e., oven conveyor) and we can generate as for every material your requests, usually stainless steel chains materials is SS304, if you require SS316 or SS316L and so forth. it is obtainable as well

 

Major Items

Business Info

EPT Business Co., Ltd. is a specialised provider of a complete selection of chains, sprockets, gears, gear racks, v belt pulley, timing pulley, V-belts, couplings, machined elements and so on.

Due to our sincerity in supplying be EPT support to our clients, understanding of your needs and overriding sense of obligation toward filling ordering specifications, we have obtained the tru EPT of purchasers throughout the world. Getting accrued precious experience in cooperating with international buyers, our items are promoting effectively in the American, European, South American and Asian marketplaces.Our products are created by modern day computerized machinery and products. In the meantime, our items are manufactured according to large quality stHangZhourds, and complying with the global sophisticated stHangZhourd criteria.

With several years’ encounter in this line, we will be trustworthy by our advantages in aggressive value, a single-time shipping and delivery, prompt reaction, on-hand engineering support and good following-income providers.

Additionally, all our manufacturing processes are in compliance with ISO9001 stHangZhourds. We also can style and make non-stHangZhourd merchandise to fulfill customers’ unique specifications. Top quality and credit are the bases that make a corporation alive. We will supply be EPT providers and large high quality merchandise with all sincerity. If you need to have any information or samples, remember to get in touch with us and you will have our shortly reply.

 

Packaging & Shipping

Exhibition

Speak to Us

 

The use of first equipment manufacturer’s (OEM) component numbers or emblems , e.g. CASE® and John Deere® are for reference purposes only and for indicating product use and compatibility. Our company and the listed alternative areas contained herein are not sponsored, approved, or produced by the OEM.

China Roller chain and sprocket manufacturer 08BHF8 forklift chain rollers  in Rajshahi Bangladesh  Short Pitch Transmission Precision Roller Chains B Series Simplex with ce certificate top quality low price

China Roller chain and sprocket manufacturer 08BHF8 forklift chain rollers  in Rajshahi Bangladesh  Short Pitch Transmission Precision Roller Chains B Series Simplex with ce certificate top quality low price

China Roller chain and sprocket manufacturer 08BHF8 forklift chain rollers  in Rajshahi Bangladesh  Short Pitch Transmission Precision Roller Chains B Series Simplex with ce certificate top quality low price

China Roller chain and sprocket manufacturer 08BHF8 forklift chain rollers  in Rajshahi Bangladesh  Short Pitch Transmission Precision Roller Chains B Series Simplex with ce certificate top quality low price

China Roller chain and sprocket manufacturer Simplex senqcia roller chain China in Izhevsk Russian Federation Short Pitch Precision Roller Chain 12b with ce certificate top quality low price

China Roller chain and sprocket manufacturer Simplex senqcia roller chain China in Izhevsk Russian Federation  Short Pitch Precision Roller Chain 12b with ce certificate top quality low price

We – EPG Team the greatest Chain and agricultural gearbox manufacturing unit in China with 5 distinct branches.

our merchandise are marketing well in the American, European, South American and Asian markets. a specialised provider of a full range of chains, sprockets, gears, gear racks, V-belts, couplings and reducers, pto shaft, agricultural gearboxes….As With detailed requirments, we can also develop your specific designed product. a specialized provider of a entire selection of chains, sprockets, gears, equipment racks, V-belts, couplings and reducers, pto shaft, agricultural gearboxes….a outcome, we have turn out to be a extensive manufacturer in the movement and management field providing an extensive lineup of items with exceptional sturdiness, atmosphere-friendliness, and good quality. Standard roller chain is available with pitches from 1/2 to 3 inches. Chain numbers are identified by multiplying the pitch by eighty (a 1/2 inch pitch chain would be a No. 40 chain). A hyphenated suffix suggests a number of strands. Product Description

one. StHangZhourd  :  ISO /DIN /ANSI 
2. Model       : twenty five-1 35-1 40-1 fifty-1 60-1 eighty-1 100-1 a hundred and twenty-1 one hundred forty-1 a hundred and sixty-1 180-1 two hundred-1 240-1 
                        04B-1 05B-1 06B-1 08B-1 10B-1 12B-1 16B-1 20B-1 24B-1 28B-1 32B-one
                        Duplex, Triplex, Hefty duty and so on. 
3.Materials   :  Alloy Metal & Stainless Steel

Transmission Roller Chain:

one.All areas are heat treatment(quenching and tempering) and controlled in a reasonable tolerance  range.

2.Tensile strength:fifteen-20% higher than the stHangZhourd

three.Certificate of High quality: ISO 9001:2000,SGS

four.Centreless grinding.

5.Great lubrication with excellent grease.

six.Shade:self,dim yellow,dim blue,black

Techncial Day

EPT Chain NO.

Pitch

Roller Dia.

Internal-plate Width

Pin diameter

Pin length

Internal-plate depth

Plate Thickness

Final

Tensile

power

  p

 d1

max

 b1

min

 d2

max

 L/Lc

max

 h2

max

 t/T

max

 Q

min

   mm  mm  mm  mm  mm  mm  mm  mm
  04B-1  6.000  4.00  2.eighty  1.eighty five  6.eighty/ 7.8  5.  0.60  3./682
  05B-1  8.000  5.00  3.00  2.31  8.twenty/ 8.9  7.10  0.eighty  5./1136
  *06B-1  9.525  6.35  5.72  3.28  13.15/ fourteen.1  8.20  1.30  9./2045
  08B-1  12.seven hundred  8.51  7.seventy five  4.forty five  16.70/ 18.two eleven.eighty  1.sixty  18./4091
  10B-one  15.875  10.sixteen  9.sixty five  5.08  19.50/ 20.9  14.70  1.70  22.4/5091
  12B-one  19.050  12.07  11.sixty eight  5.72  22.50/  24.2  16.00  1.85  29./6591
  16B-1  25.four hundred  15.88  17.02  8.28  36.ten/ 37.four  21.00  4.15/3.one  60./13636
  20B-one  31.750  19.05  19.56  10.19  41.30/ forty five,  26.40  4.5/3.5  95./21591
  24B-one  38.100  25.forty  25.40  14.63  53.40/ fifty seven.eight  33.twenty  6./4.eight  160./36364
  28B-one  44.450  27.ninety four  30.99  15.ninety  65.ten/ sixty nine.5  36.70  7.5/6.  200./45455
  32B-one  50.800  29.21  30.ninety nine  17.eighty one  66.00/ seventy one.  42.00  7./6.  250./56818
  40B-one  63.five hundred  39.37  38.10  22.89  82.20/ 89.2  52.ninety six  8.5/8.  355./80682
  48B-one  76.200  48.26  45.seventy two  29.24  99.ten/ 107.  63.eighty  12./10.  560./127272
  56B-1  88.900  53.ninety eight  53.34  34.32  114.6/ 123.  77.eighty  13.5/12.  850./193180
  64B-one  101.60  63.fifty  60.ninety six  39.forty  130./ 138.five  90.seventeen  15./thirteen.  112./254544
  72B-1  114.30  72.39  68.58  44.48  147.4/ 156.4  103.sixty  17./fifteen.  1400./318180

Relevant Products 
      
     Stainless Steel Roller Chain       Top Roller Chain with Nylon Material  Top Roller Chain with Metal Maatrial     Extend Pin Roller Chian                  
Application  

About Us

Kasin group was recognized in 1989, and its fir EPT item is casting carrier trolley for electricity & free conveyor system. In 1995, EPT acquired HangZhou Guoping Forging Manufacturing facility (LYGP), a marketer of forging bolts & nuts to power & free line market place in china. With this acquisition, EPT positioned itself as 1 of key components suppliers of monorail and electricity & free conveyor program in china.

In 2005, H&H Corp., a professional producer of massive measurement conveyor chain, was bought a portion as sharehould by Kasin, and labored as export window to all in excess of the entire world, particularly bucket elevator chain, sugar mill chain, welded mill scaper chain.

In 2015, EPT set up by itself equipment organization/ EPT machinery(ZheJiang )Co.,Ltd., created fleixible coupling, eg: FCL Coupling, NM Coupling, Curved Jaw Coupling, Chain Coupling andJaw Coupling.

Today, EPT is 1 of the bigge EPT expert speciali EPT of EPT Class EPT Chain, Drop Solid Rivetless Chain,  Forged Chain, Sugar Mill Chain, Bucket EPT Chain, Versatile Couplings and 100% to oversea market, covering Japan, U.S. and Europ and so forth.
 
With the certification of ISO 9001 and GB/T 19001, EPT supply top high quality goods at the sensible price tag, to earn-win situation in lengthy-conditions cooperation, adhering to the slogan: “FIR EPT TIME, Each TIME“.

Our mission is to supply highe EPT good quality items at the be EPT possible price. And in performing so, to supply an unmatched client encounter and to create buyer tru EPT and fulfillment. Honest, High quality, Efficient, Building, Security the five crucial parts constituting KASIN, which is the essential motto for all of the EPT personnel. Therefore, we preserve striving to construct a corporate system that is extremely appreciated and we hope that you keep on to decide on and use EPT products with satisfaction and satisfaction.

Exhibition

Certificates

Our Support

1. The concerns about the coupling will be answered inside of 24 hours.

2.  Update the procession of production.

3. Our specialist engineer can solution complex queries,aid you solve complex problems and   help you decide on the mo EPT ideal item according to your requirment.

4. Warranty 12 months: Free of charge alternative of defective goods inside 12 months.

Packing Detai EPT & Delivery

Interior Packing: Carton, StHangZhourd export packing or According to customer’s prerequisite

Outer packing: wood situations or According to customer’s need


FAQ

Q: Are you investing business or manufacturer ?

A: We are skillfully producer in China and possess ourself Forging & Casting-workshop, warmly welcome to pay a visit to our factory  at any time.
 

Q: How prolonged is your shipping time?

A: Normally it is 5-ten days if the products are in inventory. or it is 15-25 times if the goods are not in inventory, it is in accordance to quantity.
 

Q: Do you provide samples ? is it cost-free or further ?

A: Yes, it is accessible for EPT to post sample for acceptance free of cost, nevertheless it is EPT regulation: for new potentioal buyer, sample is totally free but consumer is responsilble for logistic charge.
 

Q: What is your phrases of payment ?

A: one hundred% T/T ahead of cargo following cargo inspect effectively
******************************************************************************************************

Follows Us:

EPT Industries(ZheJiang ) Co.,Ltd.

No.989,Guoshun Highway, ZheJiang FengPu Industrial Park,
FengXian District, ZheJiang , P.R.China, 201400

Cell: +86~13083988828: 86~571-8822571/88220973-57152031              Fax: 86~571-8822571/88220973-57152030

     
Http://     

 

 

           

The use of unique gear manufacturer’s (OEM) component quantities or emblems , e.g. CASE® and John Deere® are for reference purposes only and for indicating item use and compatibility. Our business and the outlined substitute parts contained herein are not sponsored, accredited, or manufactured by the OEM.

China Roller chain and sprocket manufacturer Simplex senqcia roller chain China in Izhevsk Russian Federation  Short Pitch Precision Roller Chain 12b with ce certificate top quality low price

China Roller chain and sprocket manufacturer Simplex senqcia roller chain China in Izhevsk Russian Federation  Short Pitch Precision Roller Chain 12b with ce certificate top quality low price

China Roller chain and sprocket manufacturer Simplex senqcia roller chain China in Izhevsk Russian Federation  Short Pitch Precision Roller Chain 12b with ce certificate top quality low price

China Roller chain and sprocket manufacturer Simplex senqcia roller chain China in Izhevsk Russian Federation  Short Pitch Precision Roller Chain 12b with ce certificate top quality low price