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Two-lobed wiper cam, base R12, tip R24, 10 thick, Ø8 bore

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

Also called: wiper cam, hammer cam, trip cam, leva de levas (martinete), Daumenwelle (Nocken)

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

length
48.0 mm
width
24.0 mm
height
10.0 mm

Notes

  • 10 mm plate cam with two lobes: a R12 base circle, a straight rising flank and a R24 tip arc of 10° on each lobe, falling straight back to the base — the classic hammer wiper that lifts a lever and lets it drop twice per turn. Ø8 bore.
  • Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

Two-lobed wiper cam, base R12, tip R24, 10 thick, Ø8 bore size chart

dimensionvalue
base circleR12
lobe tipR24, 10° arc
lobes2
thickness10 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. 353: 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

wiper-cam-2-lobe-r12-r24-b8cam, z 0..10, a tip at 175°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.
Set it up →

Plain text: sheet.txt · JSON: /api/geometry?object=wiper-cam-2-lobe-r12-r24-b8

Two-lobed wiper cam, base R12, tip R24, 10 thick, Ø8 bore, isometric render of a generated part
Render of wiper-cam-2-lobe-r12-r24-b8 from the free STEP; not to scale.

Fits with

Trip hammer: wiper cam pressing the tail of a first-order helve, isometric render of a generated part
Trip hammer: wiper cam pressing the tail of a first-order helve4 sizes★ 1 file

Questions

What is a wiper cam?

10 mm plate cam with two lobes: a R12 base circle, a straight rising flank and a R24 tip arc of 10° on each lobe, falling straight back to the base — the classic hammer wiper that lifts a lever and lets it drop twice per turn. Ø8 bore.