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Good quality 420 420H 428 428H Motorcycle Chain
1)Raw materials↓ | |
surface checking | metallic structure inspection |
sizes checking | hardness inspection |
2)Manufacture process of chain parts ↓ | |
Punching hole | polishing |
blanking | shot blasting |
curving | deburrs |
cold forging | bending |
grooving | calibrate |
chamfering | shave hole |
grinding plane and hole | rolling folding |
grinding cylindrical surface | sizing |
centreless grinding | oiling |
3)Heat treatment ↓ | |
quenching | bluing |
low temperature temper | yellowing |
duplex quenching | phosphatizing |
through hardening | washing |
oil quenching | cooling |
liquid carburizing | hardness inspection |
annealing | metallic structure inspection |
4)Assembling↓ | |
automatic choice materials | running in |
measuring chain length | pre-stretch |
measuring chain torque | high speed running in test |
tensile strength test | endurance testing of chain |
5)Packing↓ | |
end inspection | high temperature greasing |
clean oiling | cooling |
Anti-rust oiling/greasing | put in polybag,box,carton etc. |







1. Any of your kind inquiry of chains would be replied within 24 hours.
2. Well-trained and experienced sales staffs will reply all your concerns in fluent English.
3. OEM services are available with us, our professional designer would make your private idea into being.
4. Protection of your sales area, ideas of design and all your private information.
5. Delivery by air mail or ship for your orders.
Hangzhou Qianjiang Chain Industries Co., Ltd founded in 1988, is a professional manufacturer of industry transmission chains,motorcycle chains,conveyor chains,dust and water proof sealed chains and some special chains,is also the earliest manufacturer that developed and produced O-ring and X-ring sealed chains. In 2001,Qianjiang's sealed chains were awared "outstanding new products of national chain industry " and "special award". Qianjiang has three famous brands: YF , QJ and HQL.More than 60% of his products exported to oversea markets.The products completely conform to the ISO, ANSI, BS, DIN, JIS international standards and the national industry standards. Qianjiang has set up a complete set of quality management system which is provided with advanced inspection and test equipment.Since 2001,Qianjiang has been successfully certified by ISO9001 Quality Management System,SGS inspection and BV inspection.


1. who are we?
We are based in Zhejiang, China, start from 1996,sell to Domestic Market(46.00%),North America(28.00%),South America(5.00%),Eastern Europe(5.00%),Mid East(4.00%),Southeast Asia(3.00%),Western Europe(3.00%),Southern Europe(2.00%),Eastern Asia(00.00%),Central America(00.00%),Northern Europe(00.00%),South Asia(00.00%). There are total about 51-100 people in our office.
2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;
3.what can you buy from us?
Chains(used in Car,Motorcycle,Industrial Equipments,Parking Lot,Agricultural Machinery )
4. why should you buy from us not from other suppliers?
Because we are a professional factory.
5. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW;
Accepted Payment Currency:USD,EUR;
Accepted Payment Type: T/T,L/C,PayPal,Western Union,Cash,Escrow;
Language Spoken:English,Chinese

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