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Two-lobe stamp cam R14 → R30, 8 thick, Ø8 bore

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

Also called: stamp cam, wiper cam, leva de pisón, Pochdaumen

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

length
45.96 mm
width
55.17 mm
height
8.0 mm

Notes

  • Two lobes, each rising from R14 to R30 over 140° (cycloidal) and dropping straight back: the stamp's tappet rides up the lobe and falls off its tip twice per turn.
  • Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

Two-lobe stamp cam R14 → R30, 8 thick, Ø8 bore size chart

dimensionvalue
lobes2
lift16 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. 85: 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

stamp-cam-2-lobe-r14-r30-bore8as drawn in the mechanism's own frameSTEP · 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=stamp-cam-2-lobe-r14-r30-bore8

Two-lobe stamp cam R14 → R30, 8 thick, Ø8 bore, isometric render of a generated part
Render of stamp-cam-2-lobe-r14-r30-bore8 from the free STEP; not to scale.

Fits with

Cams lifting a stamp that drops by its own weight, isometric render of a generated part
Cams lifting a stamp that drops by its own weight3 sizes★ 1 file

Questions

What lifts a stamp?

Two lobes, each rising from R14 to R30 over 140° (cycloidal) and dropping straight back: the stamp's tappet rides up the lobe and falls off its tip twice per turn.