Tapping the End holes on V-Slot Openbuilds extrusion can be tricky, keeping the tap straight is a challenge, I have created A tap holder for each V-Slot profile currently available. these
Two versions are available for each extrusion profile 5mm bore or 6.25mm bore, The 5mm is good for a regular tap, and the 6.25mm is common with Drill/Tap Bits where the Shank is 6.25mm (1/4")
the holders cover 20mm of the extrusion to keep it square and straight.
Tap holders created for all profiles. 20x20, 20x40, 20x60, 20x80, 40x40, and C-beam
Note: The photo looks crooked.
Don’t worry about the photo, the tap I was using was much smaller then bore in holder, so it looks off but, it was just to show how it works
recommend printing upside down, preferably without support.