Formula variables
- Cable weight is the loaded cable weight per metre.
- Straight length is the straight-pull route length used for this simplified screen.
- Friction coefficient is the entered pull-planning assumption.
- Limits are user-entered manufacturer or project review values.
Assumptions
- Straight-pull tension is estimated from cable weight, straight length, friction coefficient, and gravity.
- Sidewall pressure is estimated from calculated tension divided by bend radius.
- The entered pulling and sidewall limits must come from cable manufacturer or project engineering data.
- This does not model compound bends, vertical pulls, capstan effect, jam ratio, lubricant compatibility, or reel setup.
Examples
Straight pull example. A 2 kg/m cable over 100 m at 0.5 friction estimates about 981 N pulling tension and 1634 N/m sidewall pressure at a 0.6 m bend radius.
Limit workflow. Use the result as a rough screen only, then compare against cable manufacturer pulling and sidewall limits.