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Peg clutch: sliding pulley driven by a peg on a collar

What is the simplest clutch? · Hardware · basis: Xem Studio design following Brown No. 361 (1868)

Also called: peg clutch, pin clutch, sliding pulley clutch, dog clutch, embrague de tetón, Stiftkupplung

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

sizes
4 in table

Notes

  • A collar fixed to the shaft carries a peg standing out from its face; a loose pulley beside it carries a matching peg. Sliding the pulley along the shaft (by a fork, not drawn) brings the two pegs into the same plane, the collar's peg catches the pulley's and drives it; sliding it back frees it.
  • Drawn engaged: both Ø3 pegs at 5.5 mm radius, 31.65° apart so that they touch (contact only); pegs are Ø3 × 12 dowels projecting 6 mm (the collar's grub screw and the shifting fork are not drawn).
  • Brown's No. 361 (pulley clutch by a peg on the shaft and a peg on the pulley). Engages only once per turn and with a shock — a claw or friction clutch is used where that matters.
  • Parts (each has its own page): peg-clutch-collar-d16x8-b5, peg-clutch-pulley-d30-b5, linear-shafts-h6, dowel-pins-metric.
  • Brown's movement No. 361 (1868) shows it; this model is a Xem Studio design following his figure, every part at true size.

Peg clutch: sliding pulley driven by a peg on a collar size chart

parametervalue
shaftØ5 × 100
collarØ16 × 8
pulleyØ30 face, Ø36 flanges
pegs2 × Ø3 at r = 5.5

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. 361: figure, his text and an animationwebPublisher'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

peg-clutch-mechanism-assemblyAssembled mechanism, all parts placed at one pose (STEP keeps each part separate)STEP · 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=peg-clutch-mechanism

Peg clutch: sliding pulley driven by a peg on a collar, isometric render of a generated part
Render of peg-clutch-mechanism-assembly from the free STEP; not to scale.

Fits with

Peg clutch collar Ø16 × 8, Ø5 bore, Ø3 peg hole at 5.5 mm, isometric render of a generated part
Peg clutch collar Ø16 × 8, Ø5 bore, Ø3 peg hole at 5.5 mm16.0×16.0×8.0 mm★ 1 file
Peg clutch pulley Ø30 face, Ø36 flanges, 14 wide, Ø5 bore, Ø3 peg hole, isometric render of a generated part
Peg clutch pulley Ø30 face, Ø36 flanges, 14 wide, Ø5 bore, Ø3 peg hole36.0×36.0×14.0 mm★ 1 file
Linear shafts Ø3 to Ø25 mm (h6), 100 to 1000 mm long, isometric render of a generated part
Linear shafts Ø3 to Ø25 mm (h6), 100 to 1000 mm long10 sizes★ 70 files
Dowel pins, 2–6 mm (ISO 2338 / DIN 6325), isometric render of a generated part
Dowel pins, 2–6 mm (ISO 2338 / DIN 6325)5 sizes★ 23 files

Questions

What is the simplest clutch?

A collar fixed to the shaft carries a peg standing out from its face; a loose pulley beside it carries a matching peg. Sliding the pulley along the shaft (by a fork, not drawn) brings the two pegs into the same plane, the collar's peg catches the pulley's and drives it; sliding it back frees it.