Xem Studiomeasured geometry

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Pin (stud) clutch: studs on a sliding disc enter holes in a fixed disc

How does a pin clutch couple two shafts? · Hardware · basis: Xem Studio design following Brown No. 52 (1868)

Also called: pin clutch, stud clutch, positive clutch, claw coupling, embrague de pernos, Bolzenkupplung

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

sizes
3 in table

Notes

  • Two shafts end to end: one carries a disc with holes, the other a disc with studs that slides on a feather key. Pushed together, the studs enter the holes and the shafts turn as one; pulled back, they are free.
  • Here Ø50 × 8 discs, four Ø6 studs on a 16 mm radius, Ø8 shafts with a 2 × 2 feather key; drawn engaged (studs fully home). Engage it only at rest or slow speed: it is a positive clutch, with no slip.
  • Brown's No. 52.
  • Parts (each has its own page): pin-clutch-disc-4-holes-50, pin-clutch-disc-4-studs-50-keyed, keyed-shaft-8x100-key2, feather-key-2x2x30, linear-shafts-h6.
  • Brown's movement No. 52 (1868) shows it; this model is a Xem Studio design following his figure, every part at true size.

Pin (stud) clutch: studs on a sliding disc enter holes in a fixed disc size chart

parametervalue
discs2 × Ø50 × 8
studs4 × Ø6 × 10 on R16
shaftsØ8, key 2 × 2

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. 52: 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

pin-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=pin-clutch-mechanism

Pin (stud) clutch: studs on a sliding disc enter holes in a fixed disc, isometric render of a generated part
Render of pin-clutch-mechanism-assembly from the free STEP; not to scale.

Fits with

Pin-clutch disc Ø50 × 8 with four Ø6 holes on R16, Ø8 bore, isometric render of a generated part
Pin-clutch disc Ø50 × 8 with four Ø6 holes on R16, Ø8 bore50.0×50.0×8.0 mm★ 1 file
Pin-clutch disc Ø50 × 8 with four Ø6 × 10 studs, Ø8 bore with 2 mm keyway, isometric render of a generated part
Pin-clutch disc Ø50 × 8 with four Ø6 × 10 studs, Ø8 bore with 2 mm keyway50.0×50.0×18.0 mm★ 1 file
Shaft Ø8 × 100 with a 2 × 1 keyway (60 mm), isometric render of a generated part
Shaft Ø8 × 100 with a 2 × 1 keyway (60 mm)8.0×8.0×100.0 mm★ 1 file
Feather key 2 × 2 × 30, isometric render of a generated part
Feather key 2 × 2 × 302.0×2.0×30.0 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

Questions

How does a pin clutch couple two shafts?

Two shafts end to end: one carries a disc with holes, the other a disc with studs that slides on a feather key. Pushed together, the studs enter the holes and the shafts turn as one; pulled back, they are free.