TAPPING IRREGULAR SURFACES
When manually tapping on an irregular surface or where you just want it to go in dead straight to the hole you drilled, simply install an old countersink tool in the chuck after removing the drill bit. Then, drive the tap with a box end wrench or tap driver while holding down with pressure from the quill. This will support the tap and keep the drive end from orbiting the centerline.

Ron Flood
Cedar Machine
North Branch, MN
October, 2020