How is thread torque calculated?
How is thread torque calculated?
The widely recognized engineering formula, T= K x D x P (to be explained later in this article), was used to provide the chart’s values, but it must be understood that every bolted joint is unique and the optimum tightening torque should be determined for each application by careful experimentation.
How much torque does a 1/2 inch bolt have?
ASTM A449 / SAE Grade 5*
| Bolt Size | TPI | Tightening Torque (ft lbs) |
|---|---|---|
| Plain | ||
| 1⁄2 | 13 | 75 |
| 9⁄16 | 12 | 109 |
| 5⁄8 | 11 | 150 |
How do you calculate tension torque on a bolt?
The Torque/Tension Equation is a method used to estimate the torque/tension relationship in an assembly. T = (K D P)/12 can be used to developt a torque value that will achieve a certain tension or clamp load.
What is the torque on a 3/4 inch bolt?
Tightening Torque Guide for Grade 5 & 8 Hex Cap Screws
| GRADE 5 | ||
|---|---|---|
| Coarse Thread | ||
| 9/16-12 (.5625) | 11625 | 82 ft lbs. |
| 5/8-11 (.625) | 14400 | 112 ft lbs. |
| 3/4-10 (.750) | 21300 | 200 ft lbs. |
What is the torque spec for 1/4 20 bolt?
Tightening Torque Guide for Grade 5 & 8 Hex Cap Screws
| GRADE 5 | ||
|---|---|---|
| Coarse Thread | ||
| 1/4-20 (.250) | 2025 | 76 in lbs. |
| 5/16-18 (.3125) | 3338 | 13 ft lbs. |
| 3/8-16 (.375) | 4950 | 23 ft lbs. |
How do you calculate torque based on weight?
To calculate load torque, multiply the force (F) by the distance away from the rotational axis, which is the radius of the pulley (r). If the mass of the load (blue box) is 20 Newtons, and the radius of the pulley is 5 cm away, then the required torque for the application is 20 N x 0.05 m = 1 Nm.