Sample · 24 DP · 20°

30T : 90T · 24 DP, ¼" bores

A 3 : 1 instrument pair in 24 DP on ¼" shafts, #4-40 set screws.

Inch (diametral pitch)30 : 90

Build it with your AI

Using the CheapCAD Tools connector, design a two-gear drive in Gear Designer: diametral pitch 24, face width 6.35 mm. Gear 1: 30 teeth, a 6.35 mm bore, a hub on one face, Hub OD 16 mm, Hub Height 8 mm, 1 #4-40 set screw in a tapped hole. Gear 2: 90 teeth, a 6.35 mm bore, a hub on one face, Hub OD 16 mm, Hub Height 8 mm, 1 #4-40 set screw in a tapped hole, spokes: 4 of them, Hub OD 16 mm, Width 5 mm, Rim Depth 7 mm, Fillets 1 mm at the rim and 2 mm at the hub, Spoke Height 3 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 · 30 teeth

30T gear · tip Ø33.9 mm · bore Ø¼" · hub Ø16, 1 × #4-40 set screw (tapped)

Gear 2 · 90 teeth

90T gear · tip Ø97.4 mm · bore Ø¼" · hub Ø16, 1 × #4-40 set screw (tapped) · 4 spokes, rim 7, web 3

The mesh · 24 DP · 20°

ratio 3 : 1 · centre distance 63.5 mm · contact ratio 1.75 · backlash 0.124–0.234 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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