Copper Powders for Bearings
Spherical fine copper powder (micro spherical
copper powder) and bronze powder are among the main ingredients of
self-lubricating sliding bearings. Copper and bronze powders enhance the working
characteristic of bearings while reducing the coefficient of friction.
Two of the copper products used in bearings are copper powders grades CU151 and CU165.
While many self lubricating bearings are made
by sintering compressed powders, many others are made of plastic - metal
Copper-polyethylene mixtures have been used for
self-lubricating bearing applications. A composition containing 75% copper
powder and 25% high molecular weight, high density polyethylene has exhibited
good bearing properties.
The addition of bronze powder to PTFE (polytetrafluoroethylene) increases the
hardness and compressive strength, improves dimensional stability, and lowers
cold flow, creep and wear. Improvements are progressive up to a maximum of about
70% bronze. However, the addition of bronze makes the PTFE unsuitable for
electrical applications and for applications in environments that are corrosive
to bronze. Bronze-fortified PTFE is used for self-lubricating bearings,
compression rings, cup seals, rod seals, valve seats and liners.
Questions? Please call
973-405-6249 to discuss your specific needs.