Friction Factor for Bolted Connections
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 |