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Slotted crank arm, Ø5 hub, 3 mm slot from 6 to 19 mm

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

Also called: slotted crank, slotted arm, manivela ranurada, Schlitzkurbel

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

length
37.0 mm
width
14.0 mm
height
5.0 mm

Notes

  • Arm on a Ø14 hub (Ø5 bore) with a 3 mm wide slot whose centre line runs from 6 to 19 mm out: a Ø3 pin from another crank slides in it and drives it round.
  • Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

Slotted crank arm, Ø5 hub, 3 mm slot from 6 to 19 mm size chart

dimensionvalue
hubØ14, Ø5 bore
slot3 × 13 mm (centres 6–19 mm)
thickness5 mm

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. 220: 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

slotted-crank-arm-30arm, z 0..5, slot 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=slotted-crank-arm-30

Slotted crank arm, Ø5 hub, 3 mm slot from 6 to 19 mm, isometric render of a generated part
Render of slotted-crank-arm-30 from the free STEP; not to scale.

Fits with

Offset cranks with slotted arm (variable-speed coupling, Whitworth principle), isometric render of a generated part
Offset cranks with slotted arm (variable-speed coupling, Whitworth principle)3 sizes★ 1 file

Questions

What is a slotted crank arm?

Arm on a Ø14 hub (Ø5 bore) with a 3 mm wide slot whose centre line runs from 6 to 19 mm out: a Ø3 pin from another crank slides in it and drives it round.