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Building the model…
All generators › Gears and drives
Planetary gear maker
Sun, planets, ring and carrier that fit your casing and ratio.
About the planetary gear maker
Enter the casing size and the ratio you want. It picks tooth counts that mesh and can be assembled, tells you the exact ratio, and gives you the ring, sun, planets and carrier, shown assembled.
- The ring is held still, the sun is driven and the carrier is the output.
- It refuses tooth counts that cannot be assembled and says why.
- Use the motor plate and NEMA holes to bolt it to a stepper.
Everything runs in your browser: nothing is uploaded and there is no sign-up.
More generators
Gear maker
Spur, helical and herringbone gears with real involute teeth.
Gear pair maker
Two gears that mesh, from the shaft spacing and the ratio you need.
Ring gear maker
A casing with teeth inside, and the gear that runs in it.
Print-in-place planetary gear maker
A gear set that comes off the bed already assembled.
Harmonic drive maker
A strain wave gear with a printed flexible cup.
Timing-belt harmonic drive maker
A harmonic drive that uses a timing belt as the flexible part.
Timing pulley maker
GT2, HTD, XL, MXL and T-series pulleys with any tooth count.
Print-in-place bearing maker
Roller bearings that print already assembled.