Sample · module 3 · 20°

20T : 60T · module 3, keyed

A 3 : 1 module 3 spur pair on DIN 6885 keyed shafts, a hub on each gear.

Industrial20 : 60

Build it with your AI

Using the CheapCAD Tools connector, design a two-gear drive in Gear Designer: module 3 mm, face width 25 mm. Gear 1: 20 teeth, a 20 mm bore with a keyway 6 mm wide and 2.8 mm deep, a hub on one face, Hub OD 40 mm, Hub Height 20 mm, 1 M6 set screw in a tapped hole. Gear 2: 60 teeth, a 30 mm bore with a keyway 8 mm wide and 3.3 mm deep, a hub on one face, Hub OD 55 mm, Hub Height 20 mm, 1 M6 set screw in a tapped hole, spokes: 6 of them, Hub OD 55 mm, Width 16 mm, Rim Depth 16 mm, Fillets 3 mm at the rim and 5 mm at the hub, Spoke Height 12 mm (a thinned web). 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 · 20 teeth

20T gear · tip Ø66 mm · bore Ø20 mm, keyway 6 mm wide · hub Ø40, 1 × M6 set screw (tapped)

Gear 2 · 60 teeth

60T gear · tip Ø186 mm · bore Ø30 mm, keyway 8 mm wide · hub Ø55, 1 × M6 set screw (tapped) · 6 spokes, rim 16, web 12

The mesh · module 3 · 20°

ratio 3 : 1 · centre distance 120 mm · contact ratio 1.67 · backlash 0.165–0.305 mm

The link opens both parts in the Gear Designer's 3D Mode. Change the teeth, module or pitch, bore, hub or spokes, then download STL, STEP, DXF or SVG.

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