Doesn't have to be worm clamps, either...but they do work extremely well.
My own leadscrew was chosen as 5/16", because it would thread into a 1/4" ID tube...reaming out the inside of one end should allow you enough clearance to get your larger lead screw in there.
Let me know if it works...I haven't tried this with a larger dia screw, so it's untested.
-- Chuck Knight |