Hand Tools

Subject:
Sorta yes....
Response To:
metal vs wood threads ()

John in NM
But not when assuming equal torque applied. Equal torque is generally going to mean equal force.

With metal threads you can apply a lot more torque before the threads fail or wear excessively (leading to failure in a shortish time frame). You'd never lift a car with a wooden scissor jack with a the tiny lead screw that most of those jack's have, if that screw were wood. The threads would probably shear off.

I would expect a wooden thread to shear off along the grain at the base of the threads long before you even approach the torque you could apply to a similarly sized steel thread (speaking generally of course, there could well be exceptions).

I think the more appropriate question is just how much torque (and resulting clamping force) do you really need?

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