Worm Gear Design Factors: friction_vs_velocity
Worm gear design factors per AGMA 6034-B92 and Shigley's MED 10th Ed — friction coefficients vs sliding velocity, efficiency vs lead angle and friction, AGMA materials factor Cs, velocity factor Cv, Lewis form factor Y for worm wheel, and service factors Ko
| parameter type | record id | friction coeff (dimensionless) | notes | sliding velocity fpm (ft/min) | sliding velocity m s (m/s) |
|---|---|---|---|---|---|
| friction_vs_velocity | fric_v000 | 0.15 | Friction coeff at Vs=0; AGMA limit f=0.15; well-lubricated hardened steel worm / phosphor bronze wheel | 0 | 0 |
| friction_vs_velocity | fric_v010 | 0.088 | Friction coeff at Vs=10 fpm (0.051 m/s); AGMA Eq3 switchover at 0.0508 m/s | 10 | 0.051 |
| friction_vs_velocity | fric_v025 | 0.077 | Friction coeff at Vs=25 fpm (0.127 m/s) | 25 | 0.127 |
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