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Strap-brake lever: fulcrum and strap pins Ø4 24 mm apart, handle to 142 mm

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

Also called: brake lever, palanca de freno, Bremshebel

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

length
153.0 mm
width
12.0 mm
height
5.0 mm

Notes

  • 5 mm lever pivoted on a Ø4 fulcrum pin that also anchors one end of the strap; the other end is pinned 24 mm along it, so a small turn of the lever pulls that end and closes the strap on the drum with a 142 mm handle's leverage (≈ 6 : 1).
  • Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

Strap-brake lever: fulcrum and strap pins Ø4 24 mm apart, handle to… size chart

dimensionvalue
pins2 × Ø4, 24 mm apart
handle142 mm from the fulcrum
thickness5 mm

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. 242: 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

strap-brake-lever-130-pins24lever in the drum's frame, fulcrum at (−12, −48), z −5..0STEP · STL
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Plain text: sheet.txt · JSON: /api/geometry?object=strap-brake-lever-130-pins24

Strap-brake lever: fulcrum and strap pins Ø4 24 mm apart, handle to 142 mm, isometric render of a generated part
Render of strap-brake-lever-130-pins24 from the free STEP; not to scale.

Fits with

Crane strap brake: steel strap round a drum, tightened by a lever, isometric render of a generated part
Crane strap brake: steel strap round a drum, tightened by a lever4 sizes★ 1 file

Questions

What tightens a strap brake?

5 mm lever pivoted on a Ø4 fulcrum pin that also anchors one end of the strap; the other end is pinned 24 mm along it, so a small turn of the lever pulls that end and closes the strap on the drum with a 142 mm handle's leverage (≈ 6 : 1).