I am planning to install my twin screw vise on my 36" wide bench as a huge end vise. I don't have a skirt on my bench (it's a huge douglas fir slab), so I will install one that will act as the rear jaw. The vise comes with 3/8" bolts and round barrel nuts to secure it to the bench (see picture below from the directions).
This skirt will be installed with the grain opposite that of the benchtop - but the directions have me drilling 13/32" holes. The bolts are 3/8" (or 12/32"). This only gives me 1/32" of expansion room for the benchtop. Should I oversize these holes? There is a washer so they should be held in securely even with a bigger hole (right?). How much should I oversize them?
I'm surprised the directions missed this...maybe they assume you are installing it as a face vise, but the pictures in the manual show it as an end vise.
Thanks.
vise.jpg