Xem Studiomeasured geometry

Library › Hardware › Mechanism parts ·

Crank gear, module 1, 30 T with a Ø3 crank-pin hole at 10 mm

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

Also called: crank gear, gear with crank pin, engranaje con manivela, Kurbelzahnrad

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

length
31.99 mm
width
31.89 mm
height
8.0 mm

Notes

  • The catalog module 1, 30-tooth gear (Ø10 bore, 8 face) with a Ø3 crank-pin hole on a 10 mm radius, a quarter tooth pitch (3°) off a tooth centre so that two of them meshed at 30 mm turn as mirror images (Cartwright's parallel motion).
  • Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

Crank gear, module 1, 30 T with a Ø3 crank-pin hole at 10 mm size chart

dimensionvalue
module1
teeth30
crank radius10 mm
pin holeØ3 at 3° from a tooth centre
boreØ10

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. 328: 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

crank-gear-m1-30t-r10crank gear, z 0..8STEP · 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.
Set it up →

Plain text: sheet.txt · JSON: /api/geometry?object=crank-gear-m1-30t-pin-r10

Crank gear, module 1, 30 T with a Ø3 crank-pin hole at 10 mm, isometric render of a generated part
Render of crank-gear-m1-30t-r10 from the free STEP; not to scale.

Fits with

Cartwright's parallel motion (twin gears and cranks), isometric render of a generated part
Cartwright's parallel motion (twin gears and cranks)4 sizes★ 1 file

Questions

What is a crank gear?

The catalog module 1, 30-tooth gear (Ø10 bore, 8 face) with a Ø3 crank-pin hole on a 10 mm radius, a quarter tooth pitch (3°) off a tooth centre so that two of them meshed at 30 mm turn as mirror images (Cartwright's parallel motion).