Torque
T [lbf-in] = HP x 63024 T [Nm] = kW x 7125
RPM RPM
When calculating the operating torque, it must also be compared to the ultimate breaking torque as it must not exceed this. An appropriate safety factor must also be applied or considered based on the application and operating conditions. Taking into consideration the factors that limit the operation of a universal joint, speed x angle factor being the largest, a torque rating curve is to be used as a guideline and used with care when sizing a universal joint.
Torsional Stiffness
Torsional stiffness is an indicator of a material's resistance and rigidity per degree-change in its angle when twisted. The higher this number, the higher the torque load the component can carry.
- 6.47357 Pound Inch/Radian [lbf-in/rad] = 1 Newton-Meter/Radian [Nm/rad]
- 0.01745 Pound Inch/Degree [lbf-in/Grad] = 1 Pound Inch/Radian [lbf-in/rad]
Unit Conversions (Imperial and Metric Values)
1 lbf-in = 0.11299 Nm 1 lbf-ft = 1.35582 Nm
1 Nm = 8.85075 lbf-in 1 Nm = 0.73756 lbf-ft
1 HP = 0.7457 kW 1 kW = 1.341 HP
1 Inch = 25.4 mm 1 mm = 0.0394 Inch
1 lbf = 0.4536 kg 1 kg = 2.2046 lbf
