Racal-Dana replacement key-caps

thingiverse

These are replacement key-caps for the Dana-Racal 1992 (and related) instruments. They slide onto generic momentary switches. I used "6x6x8.5mm" momentary switches purchased from amazon. These are similar to TE's 3-1825910-5 switch. One issue is that the height of the caps once installed is somewhat non-uniform due to 3D printing non-uniformities. The cap doesn't bottom-out on the actuator's shaft, which I believe causes the cap to be better held in place, but creates some part-to-part variation. The installed height of the switches can be tuned by editing the "fudgeHeight" variable in the SCAD file. It's likely that you'll need to make multiple trial runs before finding the proper value for your printer's bias. Doing this again, I'd try using "6x6x7.3" switches which have a square cap.