screw joint

A screw joint is a one-degree-of-freedom kinematic pair used in mechanisms.

It became notable in July 2011 when examination of the anatomy of the weevil revealed the first instance of a biological screw joint.

Screw joints provide single-axis translation by utilizing the threads of the threaded rod to provide such translation.

If a screwed joint (on a hot water cylinder for example) is leaking, drain down the pipe (and if necessary, the cylinder) and disconnect the fitting.

The biological screw joint is a naturally occurring form of the screw joint, a mechanical device that combines rotational movement with single-axis translation.

This is because of the torque of the turning bit working against the cutting face, because of the flexibility of the steel rods and especially the screw joints, because of reaction to foliation and structure within the rock, and because of refraction as the bit moves into different rock layers of varying resistance.