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Mutilated pinion, module 1, 20 T with 10 teeth kept (half)

What is a mutilated gear? · Modern device · basis: Xem Studio design following Brown's figure (1868); true size, no printing allowance

Also called: mutilated gear, partial gear, intermittent gear, engranaje mutilado, Teilzahnrad

Exact dimensions. True size, with no printing tolerance added.

length
21.99 mm
width
19.74 mm
height
8.0 mm

Notes

  • A module 1, 20-tooth spur gear (catalog gear, Ø6 bore, 8 face) with the teeth of one half cut away to the root circle (Ø17.5): it drives for half a turn and is idle for the other half.
  • Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

Mutilated pinion, module 1, 20 T with 10 teeth kept size chart

dimensionvalue
module1
teeth10 of 20 (180°)
root Ø (cut half)17.5 mm
boreØ6

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

Henry T. Brown (1868, public domain)Five Hundred and Seven Mechanical Movements — scan on archive.orgwebPublisher's page; dimensions are facts
507movements.comBrown's movement No. 114: figure, his text and an animationwebPublisher's page; dimensions are facts
Xem StudiodrawingwebPublisher's page; dimensions are facts

Free files

★ Free files 1 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json

mutilated-pinion-m1-20tmutilated pinion, teeth on the +Y halfSTEP · STL
Let your AI pull this. Add https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.
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Plain text: sheet.txt · JSON: /api/geometry?object=mutilated-pinion-m1-20t-half

Mutilated pinion, module 1, 20 T with 10 teeth kept (half), isometric render of a generated part
Render of mutilated-pinion-m1-20t from the free STEP; not to scale.

Fits with

Mutilated pinion and double rack (continuous rotation to reciprocation), isometric render of a generated part
Mutilated pinion and double rack (continuous rotation to reciprocation)3 sizes★ 1 file

Questions

What is a mutilated gear?

A module 1, 20-tooth spur gear (catalog gear, Ø6 bore, 8 face) with the teeth of one half cut away to the root circle (Ø17.5): it drives for half a turn and is idle for the other half.