Mechanical parts
Thumb Knob with Pointer
- Bounding box
- 10.0 × 12.0 × 5.0 mm
- Engine
- Precision B-rep
- Parameters
- 9
- Published
- October 30, 2026
Download
Free to download and use. See the terms.
The prompt
Design ONE thumb knob with pointer, 3D-printable, print 2 copies. Units cm, FDM. Round knob dia 1.0, thickness 0.5, fine grip ridges on the edge. Centre through-hole dia 0.33 for an M3 screw, with a screw-head recess dia 0.6 x 0.25 deep on the outer face. Pointer: a small triangular tab on the top edge extending 0.2 beyond the circle, pointing straight up, so it points at the engraved tick marks. Flat back face so it sits against a wall. Export STEP + STL.
Parameters
| Name | Value | Range |
|---|---|---|
| Knob Diameter | 1 cm | 0.4 – 3 |
| Knob Thickness | 0.5 cm | 0.2 – 1.5 |
| Centre Bore (M3 clearance) | 0.33 cm | 0.15 – 0.8 |
| Screw-Head Recess Diameter | 0.6 cm | 0.3 – 1.4 |
| Screw-Head Recess Depth | 0.25 cm | 0.05 – 0.4 |
| Grip Ridge Count | 36 count | 8 – 90 |
| Grip Ridge Depth | 0.03 cm | 0.005 – 0.1 |
| Pointer Overhang Beyond Circle | 0.2 cm | 0.05 – 0.8 |
| Pointer Base Width | 0.35 cm | 0.1 – 1 |
Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.
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