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Friction Coefficients: Steel screw
Brass nut Dry to Steel nut Machine oil
Static and kinetic friction coefficients between material pairs under various surface conditions
| material 1 | material 2 condition | application | material 2 | mu kinetic max (dimensionless) | mu kinetic min (dimensionless) | source table ref | standard | surface condition |
|---|---|---|---|---|---|---|---|---|
| Steel screw | Brass nut Dry | Threaded pair | Brass nut | 0.19 | 0.15 | Shigley Table 8-5 | Shigley's MED | Dry |
| Steel screw | Brass nut Machine oil | Threaded pair | Brass nut | 0.15 | 0.1 | Shigley Table 8-5 | Shigley's MED | Machine oil |
| Steel screw | Bronze nut Dry | Threaded pair | Bronze nut | 0.23 | 0.15 | Shigley Table 8-5 | Shigley's MED | Dry |
| Steel screw | Bronze nut Machine oil | Threaded pair | Bronze nut | 0.16 | 0.1 | Shigley Table 8-5 | Shigley's MED | Machine oil |
| Steel screw | Cast iron nut Dry | Threaded pair | Cast iron nut | 0.25 | 0.15 | Shigley Table 8-5 | Shigley's MED | Dry |
| Steel screw | Cast iron nut Machine oil | Threaded pair | Cast iron nut | 0.17 | 0.11 | Shigley Table 8-5 | Shigley's MED | Machine oil |
| Steel screw | Steel nut Dry | Threaded pair | Steel nut | 0.25 | 0.15 | Shigley Table 8-5 | Shigley's MED | Dry |
| Steel screw | Steel nut Machine oil | Threaded pair | Steel nut | 0.17 | 0.11 | Shigley Table 8-5 | Shigley's MED | Machine oil |
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