Drill Stop Collar (1/8, 1/4, 3/8)
thingiverse
the collars use 1/8 inch set screws, which i bought an assorted from amazon. it should go in with a little friction without tapping. Drill stop for 1/8 inch (3.18 mm), 1/4 inch (6.35 mm), 3/8 inch(9.53 mm) drill bits if the set screw is long enough it will fit anything below. If you need to drill several holes to exactly the same depth, these are pretty commonly used tools in the shops, you can also buy steel ones from online/shop. Heres a link from McMaster Carr https://www.mcmaster.com/drill-bit-stop-collars It looks nicer than using tape, and you get a force physically stopping you from pushing forward. here is the instructables page https://www.instructables.com/id/3D-Printed-Drill-Stop-Collar/ gumroad https://gum.co/kGSOO
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