Calculadora de Torque de Pernos — Fórmula
## Bolt Torque-Preload Relationship
Torque applied to a bolt creates axial preload that clamps the joint together.
### Formula
**T = K F d**
where T is the tightening torque, K is the nut factor (torque coefficient), F is the desired preload, and d is the nominal bolt diameter. K depends on lubrication: dry steel K = 0.20, lightly oiled K = 0.15, anti-seize compound K = 0.12.
Torque applied to a bolt creates axial preload that clamps the joint together.
### Formula
**T = K F d**
where T is the tightening torque, K is the nut factor (torque coefficient), F is the desired preload, and d is the nominal bolt diameter. K depends on lubrication: dry steel K = 0.20, lightly oiled K = 0.15, anti-seize compound K = 0.12.
Ejemplo Resuelto
An M16 bolt needs 50 kN preload with K = 0.2 (dry).
- F = 50 kN = 50,000 N
- d = 16 mm = 0.016 m
- T = 0.2 x 50,000 x 0.016 = 160 N-m