August 24, 2025
Description
I got sick of worrying about nicking my knuckles when grabbing tools out of the tool tray, so I designed these covers that snap onto the ER20 collet nut. I have them designed in five heights, in 1 inch (25 mm) increments, from 1" tool reach to 5" tool reach (125 mm). The inside of the cover will accommodate any straight shanked cutting tool and some smaller reduced shank cutting tools.
The print profiles are setup by height, but I made one profile that has all five heights in them so you can knock out a couple of different sizes if you need to.
I have the Tormach TTS collets, but these should work with all ER20 collets.
Once you're done printing the covers, here is the stand I use to hold up the Tormach TTS tool holder:
https://makerworld.com/en/models/423432-tormach-tts-benchtop-tool-holder
License:
Standard Digital File License