How to use oil-free bushings What does it work with

Padded ring

  In the field of valve application, the bushing is inside the valve cover, which surrounds the valve stem. Generally, DU oil-free bushings use corrosion-resistant materials such as polytetrafluoroethylene or graphite for sealing.

 

supplement

 

Role: Protect shaft, seat hole, and prevent DX oil-free bushing from abrasion; shock absorption, noise reduction; reduce disassembly and maintenance;

 

Material: An imported THORPLAS can be considered;

 

Use: dry running without grease;

 

Installation: interference fit

 

Supplement: Oil-free bushing, as the name suggests, does not need to add lubricant JDB graphite copper bushing and grease, which is convenient in use and maintenance, saving costs, time and expenses;

There are several types:

There are many in the market now, there are three main types:

1. The metal substrate is generally copper lead, with holes on the surface, and grease is added to the holes; it is supported by a large amount of grease in the holes. In fact, it requires oiling for a long time;

2. Composite bushing, one is steel back + copper powder + PTFE Teflon, the other is steel back + copper powder + POM polyoxymethylene; it belongs to press molding; it is operated by the inner wall material of the bushing, but Thin, fragile and unbearable under high pressure;

3. Non-metallic self-lubricating bushings: true self-lubricating; nylon, PTFE, and Cylon

 

 The oil-free bushing is very white, which is an improvement of the copper bushing. When designing, if the load is light, we will choose a copper bushing and an oil-free bushing.

Most oil-free bushings today are steel plates with spherical bronze powder sintered in the middle and sprayed with other substances on the surface, such as a mixture of polytetrafluoroethylene (PTFE) and lead. Features of small friction coefficient, good wear resistance and corrosion resistance, and oil-free lubrication. Mostly used for sliding parts of various machines, such as printing presses, textile machines, and hydraulic presses for fitness machines. Some bushings are specially processed to withstand high-speed motion, but they cannot withstand heavy loads.

Oil-free bearings are generally designed to be used at a low load and a low speed of 1,000 rpm.

 

 

 

Author: Zhangjiagang City Shuanglong Wangting Oil Sliding Bearing Co., Ltd.

 

Website: http://www.zsl-bearings.com