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Gear cluster, module 1: 40 T / 20 T on one Ø14 hub, Ø8 bore

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

Also called: gear cluster, cluster gear, compound gear, tren de engranajes solidarios, Zahnradblock

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

length
41.99 mm
width
41.99 mm
height
33.0 mm

Notes

  • Module 1 spur gears of 40, 20 teeth (8 mm faces at z = 16, 41) joined by a Ø14 hub into one part on a Ø8 shaft, a tooth of each on +X; each meshes at 30 mm centres with the pulley-and-gear unit of the complementary size (N₁ + N₂ = 60).
  • Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

Gear cluster, module 1: 40 T / 20 T on one Ø14 hub, Ø8 bore size chart

dimensionvalue
gears40 T / 20 T
module1
hubØ14
boreØ8

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. 58: 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

gear-cluster-m1-40-20-bore8cluster, axis ZSTEP · 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=gear-cluster-m1-40-20-bore8

Gear cluster, module 1: 40 T / 20 T on one Ø14 hub, Ø8 bore, isometric render of a generated part
Render of gear-cluster-m1-40-20-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 gear cluster?

Module 1 spur gears of 40, 20 teeth (8 mm faces at z = 16, 41) joined by a Ø14 hub into one part on a Ø8 shaft, a tooth of each on +X; each meshes at 30 mm centres with the pulley-and-gear unit of the complementary size (N₁ + N₂ = 60).