PTFE in Plastic Bearings

PTFE in Plastic Bearings

 

There are many different types of plastics which can be used for bearing applications, the most commonly used are phenolics, acetals, UHMWPE, and nylon. The temperatures and possible cold flow under heavy loads are the major limitations for those plastic bearings. Today we talk about PTFE first.

 

PTFE is a good material for bearing for its exceptionally low coefficient of friction, high self-lubricating performance, good resistance to almost all types of chemicals, and the ability to operate over extremely wide temperature range (-200 to +180 degree C continuously, up to 280 Deg C short-term).

 

New constructions of tin bronze and stainless-steel inter-layer reinforcement have raised PV value, minimized cold flow and extended wear life of bearings. Applications for PTFE center in low rpm, oscillatory or intermittent service or where reliable service without lubrication is vital that can save lots cost. PTFE reinforce the Load capacity of bearings, enhance the resistance to weather, chemicals and lubricants, help to operate smoothly, reliably, and without sticking after prolonged idle periods.

 

For the filament wound composite bearing, which is the improved versions have woven socks of PTFE and bondable material, then filament wound into a bearing sleeve with a fiberglass epoxy shell. The bearing material combines low friction and good wear resistance of filled PTFE. The self-lubricating material uses a proprietary bonding process that does not require the use of bondable secondary fibers to make a wound PTFE lining.


Plastic bearings use engineering plastics as the back material, which embedded with reinforcing fiber and lubricant. The lubricant is made of PTFE to achieve self-lubricating feature and wear resistance feature. Both fiber and lubricant improve the load capacity and friction coefficient to reduce the wear and prolong the service life. CSB self-lubricated plastic semi-finished products are customized available by the customer special requirement of uncommon bearing sizes. It is possible for the mold cost saving and improves the delivery time. The non-standard bearings are available with this flexible solution.