Stop Collar Remembers Hold-Down's Position
My solution was to place a drill-bit stop collar over the shaft of the hold-down assembly. When I have the hold-down tension set just right, I slide the stop collar down so it rests on the arm. Then I tighten it. The stop collar allows me to reset the hold-down in just the right position after each blade threading
—Wolfram Sommer, Denver, Colo.