Clamping bushing (collar) on a shaft
Mean contact pressure, friction force and maximum transmissible torque for a clamping bushing on a shaft, from bore diameter, clamped length, clamping force and coefficient of friction.
Maximum transmissible torque, T = Fᶠ·d/217.59 Nm
Friction force, Fᶠ = µ·p·A, A = π·d·L2.51 kN
Mean contact pressure, p = 2Fᵢ/(d·L)20.41 MPa
Method & references
- Clamping bushing (split collar) on a shaft — mean contact pressure, friction force and maximum transmissible torque from the clamping force and coefficient of friction.
- The clamping force Fᵢ is typically produced by two bolts together; L is the length over which the bushing grips the shaft (roughly half the total bushing length in a split-collar design).
The computation is a literal port of the original client-side JavaScript from /calculators/p5_7.htm. Results are verified equal to the original by an automated golden-master test. No formula has been re-derived or “improved”.