Star Knob for T-Handle ratchet tap wrenches
thingiverse
Just a nice and comfortable knob for those ["they're all from the same factory" ratchet tap wrenches ](https://www.google.de/search?q=t-handle+ratchet+tap+wrench&tbm=isch). The European models I had for measurements are 20mm diameter mostly with a 7mm crosshole. The crosshole in the knob is for M6 screws. M6x30mm fits perfectly. The ratchets have a small spring-loaded ball inside which keeps the screw from falling out! Print in PLA, PETG or whatever you like. The knob is not for heavy machine shop use of course, though it is quite tough. I use it for cutting M3 ... M6 threads into printed parts or for cleaning existing threads.
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