3D printed drill bit designed for tightening knurled nuts on 3.5mm jacks.
Knurled nuts are common in Eurorack systems.
See a writeup here.
- alignment: no need to align the two metal extensions
- plastic: if you have an accident, you will not scratch the module
- inexpensive: very little material, easily replaceable
- parametric: can be modified to multiple drill bit sizes
- durable: no small tips which can break off or become damaged
- simple: very easy to print, simple design which uses friction forces
- useable with power tools: most people will warn you (generally) to never use power tools for tightening these nuts, as over tightening may damage the jack.
This design will not damage your jack
if used with a power tool.
When the nut is tightened, the design of the
bit will simply cause it to slip rather than over-torque the nut.
(note: of course, you can still overtorque by pressing down too hard
In this scenario, you may cause extra wear
to the bit, but the jack will not be damaged.
Even more preferable is to use a small precision electric drill with an adjustable clutch to set the desired torque. You can see (and hear) this in action here.
See the writeup for links to the two power tools I used. Those affiliate links don't work...