Sample · 20 DP · 20°

14T : 84T · 6 : 1 arm stage

A 6 : 1 arm reduction: a pinion on an 8 mm keyed motor shaft into an 84-tooth, six-spoke gear on ½" hex.

Robotics14 : 84Shaft included

Build it with your AI

Using the CheapCAD Tools connector, design a two-gear drive in Gear Designer: diametral pitch 20, face width 12.7 mm. Gear 1: 14 teeth, profile shift x = 0.3, an 8 mm bore with a keyway 2 mm wide and 1 mm deep. Gear 2: 84 teeth, profile shift x = -0.3, a hex bar bore, 12.7 mm across flats, inch retaining rings, a retaining ring on the top face, a hub on one face, Hub OD 30 mm, Hub Height 8 mm, spokes: 6 of them, Hub OD 30 mm, Width 6 mm, Rim Depth 8 mm, Fillets 1.5 mm at the rim and 4 mm at the hub, 4 hub pins of 3 mm. Check the design, apply any Auto-fix it suggests, then export both gears as STL and give me the download link.

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

What's in this design

Gear 1 · 14 teeth

14T gear · tip Ø21.1 mm · x = 0.3 · bore Ø8 mm, keyway 2 mm wide

Gear 2 · 84 teeth

84T gear · tip Ø108.5 mm · x = -0.3 · ½" hex bar, retaining ring on the top face · hub Ø30 · 6 spokes, rim 8 · 4 × Ø3 hub pins

The mesh · 20 DP · 20°

ratio 6 : 1 · centre distance 62.23 mm · contact ratio 1.56 · backlash 0.124–0.234 mm

The link opens both parts in the Gear Designer's 3D Mode, with the sample shafts and their retaining rings, which download with the set. Change the teeth, module or pitch, bore, hub or spokes, then download STL, STEP, DXF or SVG.

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