M3 Screw Knob

i HAVE REMIXED THIS DESIGN TO CATER FOR M3, M4 AND M5 SCREWS - IT CAN BE FOUND AT https://www.printables.com/model/494231-knob-for-socket-cap-head-screws-in-m3-m4-and-m5

I have been making a Drawing Robot (https://www.thingiverse.com/thing:2349232), but had problems getting the thumbscrew knob to work for me. The hole for the nut was too small (but this may be a printing problem!). As a result I decided to make my own design using OpenSCAD.

Everything is configurable, and hopefully the variables are sufficiently documented if anyone needs to make changes. I used a Nylok M3 nut to fix mine, requiring a deeper recess, but there are clues in the comments if you choose to use ordinary nuts.

The depth of the knob is calculated - depth of the screw head + depth of the nut + 3mm.

NOTE: This is offered in the hope that it may be useful to someone - I will not be developing it any further.

MINOR UPDATE: Fixed a silly bit of OpenSCAD coding - didn't affect the print, but the bad code annoyed me!

IMPORTANT: DO NOT TRY TO USE THIS IN CUSTOMIZER! It wasn't written for that tool, and simply doesn't work. Don't waste your time!

Print Settings

Printer Brand:

Prusa

Printer: 

Prusa Clone

Rafts:

Doesn't Matter

Supports: 

Doesn't Matter

Resolution:

0.1mm

Infill: 

30%

Notes:

It's a simple thing to print in PLA, and probably just as easy in ABS. Adjust the values in the OpenSCAD file if it isn't quite right when you print it.

Category: Parts