Material
Steel ( DIN-St12|ASTM-A366/A366M-97|JIS-SPCC ) +
Bronze ( DIN-CuPb24Sn4|SAE-799|JIS-LBC6 )
Introduction
Bimetallic bearings(CuPb24Sn4), made of low carbon steel as base material, are produced by the process of being sintered leaded tin bronze CuPb24Sn4 powder as layer. They are widely used in the applications of main shaft and connecting rod of internal combustion engine due to the advantages of good fatigue resistance, good bump resistance and good load capacity.
Usage
dry |
poor |
oil lubricated |
very good |
grease lubricated |
very good |
water lubricated |
poor |
process fluid lubricated |
poor |
Physical and Mechanical Properties
max. operating temperature Tmax-greased |
+150 ℃ |
max. operating temperature Tmax-oil lubricated |
+250 ℃ |
min. operating temperature Tmin |
-50 ℃ |
max. static load Psta,max |
250 N/mm |
max. dynamic load Pdyn,max |
120 N/mm |
max. sliding speed v-greased |
2.5 m/s |
max. PV factor-greased |
2.8 N/mm2·m/s |
coefficient of friction f-greased |
0.05-0.12 |
coefficient of friction f-oil lubricated |
0.04-0.12 |
shaft surface finish Ra |
≤0.4 µm |
shaft hardness-normal |
>200HB |
shaft hardness-for service life>2000 hours |
>350HB |