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Tilt hammer lifted four times per turn by a cam

How does a tilt hammer work? · Hardware · basis: Xem Studio design following Brown No. 72 (1868)

Also called: tilt hammer, trip hammer, helve hammer, cam hammer, martinete de levas, Schwanzhammer

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

sizes
3 in table

Notes

  • A heavy hammer on a long helve, pivoted at its tail, rests on a cam shaft: each lobe lifts the helve and slips off its tip, so the hammer falls on the anvil under its own weight — four blows per turn with a four-lobe cam.
  • Here the helve is pivoted 60 mm from the cam's axis and 20 mm above it; the lobes rise from R12 to R26 over 70° (cycloidal) and drop straight back. Drawn with the cam at 40° and the helve resting on a lobe (helve at 10.81°); the anvil sits 0.5 mm under the head's lowest position, when the helve rests on the cam's R12 base circle (-2.84°).
  • Brown's No. 72 (cam lifting a tilt hammer four times a revolution); No. 353 is the version with the cam acting on the tail.
  • Parts (each has its own page): tilt-hammer-cam-4-lobe-r12-r26-bore8, tilt-hammer-helve-200-head, tilt-hammer-anvil-50x30, dowel-pins-metric, linear-shafts-h6.
  • Brown's movement No. 72 (1868) shows it; this model is a Xem Studio design following his figure, every part at true size.

Tilt hammer lifted four times per turn by a cam size chart

parametervalue
cam4 lobes, R12 → R26
helve200 mm, pivot at tail
blows per turn4

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. 72: 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

tilt-hammer-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.
Set it up →

Plain text: sheet.txt · JSON: /api/geometry?object=tilt-hammer-mechanism

Tilt hammer lifted four times per turn by a cam, isometric render of a generated part
Render of tilt-hammer-mechanism-assembly from the free STEP; not to scale.

Fits with

Four-lobe lifting cam R12 → R26, 8 thick, Ø8 bore, isometric render of a generated part
Four-lobe lifting cam R12 → R26, 8 thick, Ø8 bore48.86×48.82×8.0 mm★ 1 file
Tilt-hammer helve 200 mm with a 30 × 27 head, Ø6 pivot, isometric render of a generated part
Tilt-hammer helve 200 mm with a 30 × 27 head, Ø6 pivot200.0×27.0×8.0 mm★ 1 file
Anvil block 50 × 30 × 12 for the tilt hammer, isometric render of a generated part
Anvil block 50 × 30 × 12 for the tilt hammer50.0×30.0×12.0 mm★ 1 file
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
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 tilt hammer work?

A heavy hammer on a long helve, pivoted at its tail, rests on a cam shaft: each lobe lifts the helve and slips off its tip, so the hammer falls on the anvil under its own weight — four blows per turn with a four-lobe cam.