40 : 1
40 : 1 · module 3, keyed
m 3 · 20° · ZA
A module 3 single-start drive on keyed 12 mm and 20 mm shafts, the wheel throated to wrap the worm.
Sample · m_n 4 · 20° · ZI
15 : 1 · normal module 4, ZI
A two-start involute worm sized in the normal system (m_n 4), on keyed 16 mm and 25 mm shafts.
What's in this design
Worm · 2 starts
- 2 starts, right hand · tip Ø48, pitch Ø40, root Ø30 mm · 66 mm long · bore Ø16 mm, keyway 5 mm wide · no hub
Wheel · 30 teeth
- 30 teeth, throated · outside Ø134.47, pitch Ø122.47 mm · face 33 mm · bore Ø25 mm, keyway 8 mm wide · no hub
The mesh · m_n 4 · 20° · ZI
- ratio 15 : 1 · centre distance 81.237 mm · lead angle 11.54° · efficiency 78 % (μ 0.05) · back-drivable
The link opens the worm and wheel in the Worm Gear Designer's 3D view. Change the module or pitch, the starts, the wheel's teeth, the bores or hubs, then download STL or STEP.
More samples
Related worm drives
50 : 1
50 : 1 · module 5, ground ZK
m 5 · 20° · ZK
A module 5 worm with a disc-cutter-ground (ZK) thread driving a 50-tooth wheel on a keyed 30 mm shaft.
30 : 1
30 : 1 · module 2, one start
m 2 · 20° · ZA
The starter drive: a single-start module 2 worm turning a 30-tooth throated wheel, 30 : 1.
40 : 1
40 : 1 · module 1.5 on D-flat shafts
m 1.5 · 20° · ZA
A printable 40 : 1 reduction on 5 mm and 8 mm D-flat shafts, with 0.1 mm print compensation on both parts.