Machinist's Speed Vice Handle

thingiverse

I started with the concept of https://www.thingiverse.com/thing:3043641, but decided to redo it entirely in my own way using OpenSCAD's parametric capabilities. The files provided are tailored for my vice, but they're very flexible and should be easy to adjust. Threads rely on [threadlib](https://github.com/adrianschlatter/threadlib); follow the installation instructions there. I've left room above the threadlib invocation for you to personalize your settings - pay close attention to the nominal measurement of the socket size for your vice, as not all vices use the same socket. The parts are designed to print without supports. For best results, consider printing with thin layers or tapping the hole after printing. I used 9 perimeters, 40% cubic infill, and 0.3mm layers in PLA+, then tapped the thread form afterwards. The screw hole at the threaded end of the shoulder bolt is there to add strength; the shoulder is most likely to fail first, so screwing in any screw longer than the threaded portion will give it an extra boost. The model fits a standard M4x20mm bolt, but you can easily swap it out for whatever you have handy. Update: As of December 2020, I've been using this as my go-to vice handle and rarely reach for the metal one or the 6-point end socket. Most of the time, I just use the 12-point middle socket, which is more than sufficient for almost all my milling work. To date, there's been no noticeable wear on that 12-point socket. Initially, I thought this would be a prototype for making one from aluminum, but it's proven to be so reliable and durable that I have no plans to make a metal version - the printed one does the job perfectly well!