|Project by kiefer||posted 08-05-2014 04:29 PM||3837 views||18 times favorited||11 comments|
This whole thing started out with a search on a holdfast for square or rectengular dog holes and found no results after some extensive GOOGLE searches .
So since my bench has three rows of rectegular dog holes which I had done on purpose since my Uncles benches had that design and I had no intentions of drilling round holes I came up with this solution which I think will also work with a holdfast that is mallet driven .
I made up some square pieces of pine to fit the dog holes and drilled a 3/4” hole for the threaded rod and also added two pads of self adhesive sandpaper .
A arm with a clamping pad and 1/2” threaded rod a couple of nuts and a plywood disc wrapped with some timing belt for good grip took care of the clamp .
Two STOVER lock nuts and a piece of threaded work well for this and make for easy insertion and removel of the clamp and hold the object well and let me control the clamping pressure and can exert a good amount of pressure if rquired .