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.
Sample · m 1.5 · 20° · ZA
40 : 1 · module 1.5 on D-flat shafts
A printable 40 : 1 reduction on 5 mm and 8 mm D-flat shafts, with 0.1 mm print compensation on both parts.
What's in this design
Worm · 1 start
- 1 start, right hand · tip Ø18, pitch Ø15, root Ø11.25 mm · 25 mm long · bore Ø5 mm D-flat · no hub
Wheel · 40 teeth
- 40 teeth, throated · outside Ø64.5, pitch Ø60 mm · face 12.5 mm · bore Ø8 mm D-flat · no hub
The mesh · m 1.5 · 20° · ZA
- ratio 40 : 1 · centre distance 37.5 mm · lead angle 5.71° · efficiency 65 % (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
20 : 1
20 : 1 · ZI two-start, M3 hub
m 2 · 20° · ZI
A two-start involute (ZI) worm and a plain 40-tooth wheel whose hub holds an M3 set screw in a captured nut.
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.
15 : 1
15 : 1 · normal module 4, ZI
m_n 4 · 20° · ZI
A two-start involute worm sized in the normal system (m_n 4), on keyed 16 mm and 25 mm shafts.