Parts / Drive hub / O-ring clutch
Drag to orbit · pinch / scroll to zoom · two fingers / right-drag to pan. Shown as exported for printing, on a 10 mm grid.
Drive hub / O-ring clutch primary
Press fit on the 28BYJ-48 D-shaft; carries one 8 x 2 NBR O-ring that slips inside the cup: the torque limit. Print 2-3 and test the D-bore fit first.
- File
hardware/stl/drive_hub_clutch.stl- Bounding box
- 13.50 × 13.50 × 9.00 mm (X × Y × Z, as exported; Z up from the bed)
- Volume
- 0.62 cm³; ≈ 0.8 g if printed solid in PETG (real mass depends on walls and infill)
- Mesh
- 1,684 triangles
- Material
- PETG
- Layer
- 0.12 mm
- Walls / infill
- 100 %
- Orientation
- Flange down, as exported (D-bore vertical).
- Supports / brim
- None. A 2 mm brim helps this small part stay put.
- Quantity
- 1 per head (+ spares)
- Versions
- ABCD
Print settings are starting points from ASSEMBLY.md and the print plan, not values tested on this design. Dimensions that depend on the knob, rod or clip are estimated from photo, not caliper.