1. The "O" ring or "X" ring will greatly reduce the wearing and thus prolongthe service life by 3-5 times.
2. Model: 420V, 428V, 428VM, 520V, 525V, 530V, 530VM, 630V, 630VM, 428V-X, 428VM-X, 520V-X, 525V-X, 530V-X, 530VM-X, 630V-X, 630VM-X, 420Hz, 428Hz, 520NZ, 525Hz, 530Hz, 630HT
3. Color: Self, gold, nickel, blue, red, orange, green, yellow, pink etc.
4. Certificate of Quality: ISO 9001: 2000, SGS
5. The grease is made in USA.
6. O-ring and X-ring are made in Tianwan.
7. The chains have high tensile strength.
8. Quad-rited pins(pitch≥ 15.875mm)
9. The sealing performance of X-ring is better than O-ring.

Our yf brand o-ring chain be recommend the no. 1 in Chinese chain association, be recommend to worldwide.




Products are made of high quality alloy steel production. The plates are punched and squeezed bores by precision technology. The pin, bush, roller are machined by high-efficiency automatic equipment and automatic grinding equipment, then through heat treatment of carburization, carbon and nitrogen protection mesh belt furnace, surface blasting process etc. Assembled precision by Internal hole position, spin riveted by pressure to ensure the performance of the entire chain.
Why choose us
1. We are the manufacture.
2. We have near 30 years experience of making chains and chain links.
3. Our design team has extensive experience in the chain design.
4. Best service and prompt delivery.
5. We offer various styles, size and colors to meet your requirement.
6. We covering a production area of 18750 square meters have more than 200 employees and we have a complete set of testing equipment to ensure our quality.
Specifications