- Dec 15, 2018
1/2 inch shank hole saw arbours are quite common. A 1 1/4 hole saw won't go through the tubing in one pass at an angle (may at 90 deg) you'll have to cut part way, then get rid of the top of the waste tube with a cut off saw or hack saw to finish the cut. It hangs up in the bottom of the saw. Best to tighten the hole saw on the arbour and not use the pins, Unless its tight against the arbour they wobble and cut oversize.