Question #5350130

Is there such a thing as a spring, ie torsion spring or extension spring that is adjustable .?

So as to as easy as poss explain what I mean, imagine an arm perpendicular to a wall. When you push down on it I want it possible to adjust the tension so as to make it more difficult or easier to push down. Sounds simple but don't think it is.

2013-04-16 21:17:37

TELL US , if you have any answer

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