Xem Studiomeasured geometry

Library › Hardware › Mechanism parts ·

Pulley and gear unit: Ø40 × 16 flat pulley with a module 1, 40-tooth gear, Ø8 bore

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

Also called: pulley gear, gear pulley, polea con engranaje, Riemenscheibe mit Zahnrad

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

length
41.99 mm
width
41.99 mm
height
24.0 mm

Notes

  • A Ø40 × 16 flat-belt pulley and a module 1, 40-tooth spur gear (pitch Ø40, 8 mm face) made in one piece, running loose on a Ø8 shaft: whichever unit the belt is on drives the gear cluster beside it, so shifting the belt changes speed.
  • Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

Pulley and gear unit: Ø40 × 16 flat pulley with a module 1, 40-tooth… size chart

dimensionvalue
pulleyØ40 × 16
gearmodule 1, 40 T, pitch Ø40, 8 face
boreØ8 (runs loose)

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. 59: figure, his text and an animationwebPublisher's page; dimensions are facts
Xem StudiodrawingwebPublisher's page; dimensions are facts

Free files

★ Free files 1 parts. Xem Studio design: free to use, print and sell things from; not to be republished as files. Xem Studio Design License. index.json

pulley-gear-unit-40-m1-40t-bore8unit, axis Z, pulley z 0..16, gear z 16..24, a tooth on +XSTEP · 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=pulley-gear-unit-40-m1-40t-bore8

Pulley and gear unit: Ø40 × 16 flat pulley with a module 1, 40-tooth gear, Ø8 bore, isometric render of a generated part
Render of pulley-gear-unit-40-m1-40t-bore8 from the free STEP; not to scale.

Fits with

Two speeds by shifting a belt between pulleys carrying gears (20 / 40 T), isometric render of a generated part
Two speeds by shifting a belt between pulleys carrying gears (20 / 40 T)4 sizes★ 1 file

Questions

What is a pulley-and-gear unit?

A Ø40 × 16 flat-belt pulley and a module 1, 40-tooth spur gear (pitch Ø40, 8 mm face) made in one piece, running loose on a Ø8 shaft: whichever unit the belt is on drives the gear cluster beside it, so shifting the belt changes speed.