Machinist's Speed Vice Handle

thingiverse

I liked the concept of https://www.thingiverse.com/thing:3043641 but started over from scratch to do it my way: parametric, in OpenSCAD. The provided files are sized for the vice I have, but it is very parametric and should be easy to modify. Threads use [threadlib](https://github.com/adrianschlatter/threadlib); follow the installation instructions there. The parameters above the threadlib invocation are meant to be changed to fit. Note in particular the nominal measurement of the socket size for the vice; not all vices use the same size socket. The parts are oriented to print without supports. I suggest that you consider printing with thin layers for the thread form to work well, or tap the hole after printing. I used 9 perimeters, 40% cubic infill, and 0.3mm layers in PLA+, and tapped after printing. The screw hole in the threaded end of the shoulder bolt is for strength; the shoulder is the most likely failure point, and screwing in any screw substantially longer than the threaded portion of the shoulder bolt will increase strength. The model is designed to fit a normal M4x20mm bolt, but you can change it to whatever you have handy that fits. Update: As of December 2020 I've been using this as my primary vice handle, rarely using the regular metal handle, rarely even using the 6-point end socket. Most of the time I use only the 12-point middle socket and that is sufficient for almost all my milling work. There is no appreciable wear to even that 12-point socket yet. I had expected this to be a prototype for making one from aluminum, and expected it to break under use, but at this point I'm very satisfied with the printed version and have no plans to make a metal version.