10.24 : 1 · two 3.2 : 1 stages

Two 3.2 : 1 stages with four planets each: about 10 : 1 in a short housing.

Industrial & heavy duty10.24 : 14 planets2 stagesRing held

Build it with your AI

Using the CheapCADTools connector, design a 10.24 : 1 planetary gear set in Planetary Gear Designer: module 1 mm, 20° pressure angle, spur teeth, a 35-tooth sun, 21-tooth planets and a 77-tooth ring, four planets, a profile shift of 0.2 on the planets, face width 10 mm, two stages stacked. The sun: an 8 mm bore. The carrier's output: a 10 mm bore. Check the design, apply any Auto-fix it suggests, then export every part (the sun, a planet, the ring and the carrier) as STEP and STL and give me the download link.

Paste it into Claude, ChatGPT or any AI app with the CheapCADTools connector, and it designs this planetary set with you, checks it and hands you the files. How to connect your AI.

What's in this design

Sun

35 teeth · no shift · tip Ø36.99 mm · face 10 mm · bore Ø8 mm · no hub

Planets · 4

21 teeth · shift +0.2 · tip Ø23.39 mm · face 10 mm · bore Ø5.3 mm on a Ø5 mm pin · print 8 (4 a stage)

Ring

77 internal teeth · shift −0.4 · outside Ø90.57 mm · rim 5 mm below the roots · one ring round both stages, 31.5 mm long

Carrier

straddle (two discs and posts) · disc Ø74.8 × 5 mm · 4 pins Ø5 × 21.0 mm · output bore Ø10 mm · plus one carrier printed with the next stage's sun

The set · Module 1 · 20° · spur

10.24 : 1 reduction in two 3.2 : 1 stages: the ring is held (one ring round every stage), the sun is the input, each carrier drives the next stage's sun and the last carrier is the output.

Notes

Hardware: 8 × planet pin Ø5 × 21.0 mm; 8 × M3 screw, about 11 mm long.
2 stages, one under the other: each carrier but the last carries the next stage's sun on its underside, one part; print it sun down, with supports under its disc.

The link opens the whole set in the Planetary Gear Designer's 3D view. Change the teeth, the number of planets or stages, which member is held, the carrier, bores or hubs, then download STL, STEP or the carrier's DXF and SVG.

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