
What is a Plastic Bush or Bearing?
A bush or bearing is also known as a Plain Bearing, i.e. they don’t have rolling elements like a ball bearing. The primary function is to support movement by being an interface between rotating or sliding parts. This crucial component is designed to reduce friction between moving parts and act as a sacrificial wear component.
Benefits of Plastic Bushes & Bearings vs Other Bearings
- Eliminating Lubricants – unlike rolling element bearing and bronze bushes, often plastic bushes and bearing can run dry, especially when self-lubricating materials such as Ertalon LFX and Ertalyte TX are utilized.
- Dirty & dusty conditions – where traditional bearings suffer, plastics with high abrasion resistance such as Polystone 7000 and Ertalon LFX can provide maintenance free operation.
- Low Friction – metal-on-metal sliding in the case of bronze results in higher friction than plastic-on-metal, requiring higher energy and wear rates, opposed to the low friction of plastics, such as Nylatron NSM, Nylatron 703XL, Ertalyte TX and Ticomp S.
- Reduced wear – traditional plain bushes such as bronze result in higher shaft wear and therefore reduced service life of both the bush and the shaft (or counter-face).
Dotmar has qualified engineers that can provide direct support with plastic bush and bearing designs, including conducting calculations and reports.

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