A printable HoleSaw drill bit.
Suitable for soft materials like foam, if you need a certain size for limited use.
This was originally to make circular foam blanks but i decided it might be useful to others as a hole saw, so ive produced versions in a few common sizes of existing bits.
happy to make more if you have a need. Each is embossed with its size.
They should fit on a standard drill chuck, rather than using a plain rod or hex, i’ve made a triangular fitting that should handle more torque and be more printer compatible.
There are a couple of versions of fitting depending on size.