In consideration of the demanding needs for a bearing surface. Engine bearings are available in four materials.
BUSHES BUSHES ARE MADE BY US OF 4 KINDS.
BI-METAL BUSHES THE MOST POPULAR BEING STEEL BACK WITH COPPER LEAD ALLOY LINING. THIS IS SPECIALLY USED FOR HIGH LOADS
HARD BRONZE HAVING 90% COPPER AND 10% TIN ARE USED FOR SEVERAL WORKING CONDITIONS AND HEAVY PRESSURES SPECIALLY FOR APPLICATIONS LIKE CONNECTING ROD BUSHES AND VALVE GUIDES.
Red brass bushes having 85% copper, 5% Tin, 5% Lead and 5% Zinc are generally used for water pump impellers and slow speed engines.
Aluminum bushes Aluminum bushes are with properties such as high load carrying capacity, fatigue, strength and thermal conductivity, in addition to excellent corrosion resistance and low cost.