Changzhou Suma Precision Machinery Co., Ltd(Changzhou Tianniu Clutch Factory)is a manufacturer specialized in Producing Various cam clutch, one way bearing, one way clutch, backstop clutch, overrunning clutch and other bearings with high technology. 

We are following "Best Quality, Best Price, Fast Delivery, Best Serves" to make all of our old and new customers satisfied. 

Pre-sale service:

We will delivery the goods in 10 days after your order is confirmed.

After sale service:

Our factory provide technical assistance to support every doubt during usage and maintenance. 

Q: Why do we choose your company?

A: We always insist quality firstl. We have our bearing factory, therefore we have advantage in quality control and price of cylindrical roller bearing.

Q:What is the delivery time?

A: Most of the bearing we have stock. For small quantity, we will arrange delivery within 15 days.

Q: What is your payment term?

A: Our payment term include L/C, T/T, Western Union, Paypal etc.

Q: Can you send bearing samples first?

A: Yes, we can send bearing samples of SL cylindrical roller bearing to check quality first.

If you have any needs, pls contact me at any time!