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Stepped (speed-cone) pulley Ø50 / Ø40 / Ø30 × 20 mm steps, Ø8 bore

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

Also called: cone pulley, step pulley, speed cone, lathe step pulley, polea escalonada (cono de poleas), Stufenscheibe

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

length
50.0 mm
width
50.0 mm
height
60.0 mm

Notes

  • Three flat-belt steps Ø50, Ø40 and Ø30, each 20 mm wide (60 mm total), Ø8 bore. Two identical cones mounted the opposite way round keep the same belt length on each step pair (the diameters sum to 80 every time).
  • Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

Stepped (speed-cone) pulley Ø50 / Ø40 / Ø30 × 20 mm steps, Ø8 bore size chart

dimensionvalue
stepsØ50 / Ø40 / Ø30
step width20 mm
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. 8: 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

stepped-cone-pulley-50-40-30pulley, axis Z, Ø50 step at z 0..20STEP · 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=stepped-cone-pulley-50-40-30

Stepped (speed-cone) pulley Ø50 / Ø40 / Ø30 × 20 mm steps, Ø8 bore, isometric render of a generated part
Render of stepped-cone-pulley-50-40-30 from the free STEP; not to scale.

Fits with

Stepped cone pulleys (three speeds by moving the belt), isometric render of a generated part
Stepped cone pulleys (three speeds by moving the belt)4 sizes★ 1 file

Questions

What is a stepped cone pulley?

Three flat-belt steps Ø50, Ø40 and Ø30, each 20 mm wide (60 mm total), Ø8 bore. Two identical cones mounted the opposite way round keep the same belt length on each step pair (the diameters sum to 80 every time).