M3 Bolts/Nuts Tolerance Multipurpose Tester

thingiverse

N.B: this is WIP / need comments. I had this need because i was hired for a design job and another company was doing the prints.It was a pain to get a sense of their printer's printing offsets/bias regarding screw holes (bolts / nuts) => For the future each time i start a project i want to first send this element to print before i design anything. NOW THE DETAILS : On the left, next to M3 and in the middle we have: a regular 3mm hole (H) with 3.55 nut. (N) under it, on the edge a half-hole with same H&N and 3mm deep (D) on top a threaded hole going trough the whole tool and with a 3mm thread (T) Then after the little gap we can find the following settings (from left to right, in mm) 2nd vertical line of holes : H: 3.1 / N: 3.56 / D: 3.1 / T: scale factor 1.1 3rd vertical line of holes : H: 3.2 / N: 3.57 / D: 3.2 / T: scale factor 1.2 4th vertical line of holes : H: 3.3 / N: 3.58 / D: 3.3 / T: scale factor 1.3 5th vertical line of holes : H: 3.4 / N: 3.59 / D: 3.4 / T: scale factor 1.4 6th vertical line of holes : H: 3.5 / N: 3.60 / D: 3.5 / T: scale factor 1.5 If like me you need to really see how your prints will result on a certain printer this could be a good tool. Once you make your real M3 screws fit in you can report the little bias/offset on your whole design. you'll be sure that the print on the side of the print provider will look like you want, holding the M3 screws nicely. I have in plans to make versions for other sizes : M2.5 / M4 .. tell me in comments if it's a good idea ! inspired by https://www.thingiverse.com/thing:2347149 and https://www.thingiverse.com/thing:3418808