Push Pull Control Considerations
The load, routing, friction, stretch, effects of bends on length, temperature, and environment are all aspects to consider for the engineering of a Push Pull Control. The working loads should be the highest in the pull (tension) mode, and the push (compression) mode should be 50% or less of the pull mode. The travel should be limited to 5″ maximum for most light and medium duty applications. This will minimize the loss of input versus output.
All Push Pull controls are subject to the loss of motion between the input and output ends after the load is applied. Backlash and deflection can result from total lost motion of the control. The efficiency of the Push Pull Control is determined by the conduit, wire core, number of bends, and the relative friction between the core and conduit. The friction created by the bends reduces the efficiency of the control.
|Tubing||Braided Reinforced||Bowden||Flat Wire Bowden with Liner||Long Lay|
|Features||Lightweight, greatest flexibility||Lightweight, good flexibility, low crush resistance||Medium flexibility, compressive strength, and crush resistance||Some flexibility, good efficiency, compressive strength, and crush resistance||Least flexibility, high compression strength and crush resistance|
|Common Uses||Light duty seat releases, vent controls||Release assemblies, seat latches, window mechanisms, gas spring controls||Lower efficiency throttle controls||Remote latch and push-pull controls||Brake and clutch cables, strong push-pull controls|