|
Material |
non-lubricated |
lubricated |
|
steel - steel |
0.8 |
0.16 |
|
steel - cast iron |
0.4 |
0.21 |
|
steel - brass |
0.35 |
0.19 |
|
steel - brass |
0.13 |
0.16 |
|
cast iron - cast iron |
1 |
0.15 - 0.20 |
|
cast iron - bronze |
0.25 |
0.08 |
|
bronze - bronze |
0.25 |
0.10 |
|
aluminum - aluminum |
1.35 |
0.30 |
|
copper - copper |
1 |
0.08 |
|
steel - plexiglas |
0.4 - 0.5 |
0.4 - 0.5 |
|
plexiglas - plexiglas |
0.8 |
0.8 |