Heathkit Knobs

These are 3D models for some knobs for Heathkit equipment.

For the latest versions see: https://github.com/jefftranter/3dmodels/tree/master/HeathkitKnobs

knob-medium: Medium sized knob used on test equipment and radios like the Heathkit HR-10B.

knob-large: Large sized knob used on test equipment and radios like the Heathkit HR-10B.

knob-small: Small sized knob used on test equipment and radios like the Heathkit HR-10B.

pointer: White pointer that is mounted under the large knob on some models.

knob-medium-concentric: Medium sized knob designed to have the small knob mounted concentric to it. The center knob is usually coloured red.

The .scad files are the original OpenSCAD files that were created by hand. The .stl files were generated from OpenSCAD and are suitable for loading into your 3D printer/slicer software, such as Cura.

They are intended to be printed using a 3D printer. I have had good results with these using LulzBot Mini and Prusa i3 printers. Use the highest quality, but don't expect the quality to be the same as the original knobs.

You should print these using support material. After printing, remove the support material. I used 20% infill. You may want to use 100% on the small knob. You may need to file the hole for the shaft slightly to get it to fit. An 8-32 set screw (6-32 for the small knob) of suitable length is needed to tighten the knob on the shaft. For the knobs that have pointers, you can apply some white paint on the pointer.

I used PLA material. You can experiment with other materials. ABS, for example, could potentially be treated with acetone to make the knobs smoother.