13 years ago
I have a small woodworking router plane that has a vertical round rod
carrying the blade on the lower end. The clamping mechanism does not
provide enough force to securely hold the rod under all circumstances. The
clamp is simply a rod with a hole through it for the blade rod, pulled tight
to the router body by a thumb nut with a ¼"-28 tpi thread .
I am thinking that a V groove to hold the rod may do it. The question
arises what angle for the V. In steel, self holding tapers are generally
around 3-4°, self releasing are of the order of 15° or more. Does anyone
know where the transition point is, or better still, point to a diagram of
separation force versus taper angle? I figure I can tolerate a pretty tight
taper as there will only be a small area of tangential contact and the rod
will readily skew in the V and release.
Comments, info. welcome, John.