Simple jig to assist in tapping 1515 Misumi extrusions when builtding my RailCore II 300ZL
Place over the end of your extrusion to help align the tap. This also works for me as a depth gauge to ensure I tap about 15mm into the extrusion.
Hole is sized for an M3 tap. There is also a recessed area inside the jig to allow shavings to collect.
Printed with 4 shells from PLA.