Page 25 - The Tribology Handbook

A4 PI a i n bea ri ng materia Is

Physical properties, forms available, and applications of some copper-base all0 y bearing
materials

Plysical properties
Type of bearing Melting Coefimt Fonns available Applicatiotu
range, "C H, at 200~ of expansion
x 10 --6/ac
Lead bronze Matrix 45-70 -18 Machined cast components; Machined bushes, thrust
IS0 4382/1 -900 as lining of steel- backed washers, slides, etc., for
Cu Pb20 Sn5 components high-duty applications;
as lining of thin and
copper 75% Lead medium-walled heavily
tin 5% con-
lead 20% stituent loaded IC engine
-327 crankshaft bearings, small-
end and camshaft bushes.
gearbox bushes; gas-
turbine bearings, etc.
Lead bronze Matrix 65-90 -18 As above. Hard, strong Machined bush and thrust
IS0 4382/1 -820 bronze washer applications; as
Cu PblO SnlO lining of thin-walled split
bushes for small-ends,'
copper 80% Lead
tin 10% con- camshafts, gearboxes,
lead 10% stituent linkages, etc.
-327
Lead bronze Matrix 45-70 -18 Machined cast components, Bushes, thrust washers, slides
IS0 4382/1 -920 bars, tubes for wide range of
Cu Pb9 Sn5 applications
copper 85% Lead
tin 5% con-
lead 9% stituent
-327
Phosphor bronze -800 70-150 -18 Machined cast components; Heavy load, high-temperature
IS0 4382/1 bushes, bars, tubes, bush and slide applications,
Cu SnlO P thrust washers, slides, e.g. crankpress bushes,
etc. rolling mill bearings,
copper ;
remainder gudgeon-pin bushes, etc.
tin 10% min.
phosphorus
0.5% min.

Copper lead Matrix 3545 Lining As lining of thin-, medium- Crankshaft bearings for
IS0 4383 - 1050 -16 or thick-walled half- high- and medium-speed
Cu Pb3n bearings, bushes, and petrol and diesel engines;
thrust washers gas-turbine and turbo-
copper 70% Lead charger bearings ;
lead 30% con- compressor bearings ;
stituent camshaft and rocker
-327 bushes. May be used with
or without overlay
Lead bronze Matrix 40-55 Lining As above As above, for more heavily
IS0 4383 -900 -18 loaded applications, usually
Cu Pb24 Sn4 overlay plated for crank-
shaft bearing applications
copper 74% Lead
lead 24% con-
tin 4% stituent
-327

Note: for details ofother lead bronzes, gunmetals, leaded gunmetals, and aluminium bronzes, consult IS0 4382/1, IS0 4383, EN 133 and
bearing supplier.

A4.2