# Calculating Pin Friction

cs003

## Homework Statement

I'm trying to determine the friction of a pin joint that will be loaded differently depending on the position of the linkage.

## Homework Equations

I know the equation for frictional force is F="mu"*N, where "mu" is either the coefficient of static or kinetic friction depending on if the surface is in motion, but I'm not sure how to apply that to a pin joint.

## The Attempt at a Solution

Im assuming the pin to be "loose fitting" so that friction will be basically limited to a point on the surface. And if I know the force applied to the joint, can I just take that force as N in the equation and and find the appropriate "mu" to solve for the frictional force? I'm just looking for a decent approximation for the friction.

cs003
Since there have been no respones, should I assume that my logic is reasonable? Or just nobody has a decent idea about it either?
Any input would be appreciated.

Thanks.

andrew.c
Only in 1st year, but that logic sounds right based on my lecture notes

cs003
Thanks.

I'm really just looking for a rough estimate of friction, but I was mainly looking for input just to make sure I wasn't overlooking something too major.