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Ratchet feed arm, pawl pivot at 30 mm, Ø5 hub

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

Also called: ratchet lever, feed lever, pawl arm, palanca de trinquete, Schaltklinkenhebel

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

length
77.0 mm
width
14.0 mm
height
5.0 mm

Notes

  • Lever that swings on the ratchet wheel's Ø5 shaft and carries the feed pawl on a Ø3 pin 30 mm out, with a 40 mm handle beyond: rocking it to and fro steps the Ø40, 24-tooth ratchet one or more teeth per stroke.
  • Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

Ratchet feed arm, pawl pivot at 30 mm, Ø5 hub size chart

dimensionvalue
hubØ14, Ø5 bore
pawl pivotØ3 at 30 mm
handle40 × 10 mm
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. 225: figure, his text and an animationwebPublisher's page; dimensions are facts
Xem StudiodrawingwebPublisher's page; dimensions are facts

Free files

★ Free files 1 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json

ratchet-feed-arm-30arm, z 0..5, pawl pivot on +XSTEP · STL
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Plain text: sheet.txt · JSON: /api/geometry?object=ratchet-feed-arm-30

Ratchet feed arm, pawl pivot at 30 mm, Ø5 hub, isometric render of a generated part
Render of ratchet-feed-arm-30 from the free STEP; not to scale.

Fits with

Ratchet wheel stepped by a swinging pawl lever, isometric render of a generated part
Ratchet wheel stepped by a swinging pawl lever3 sizes★ 1 file

Questions

What is a ratchet feed arm?

Lever that swings on the ratchet wheel's Ø5 shaft and carries the feed pawl on a Ø3 pin 30 mm out, with a 40 mm handle beyond: rocking it to and fro steps the Ø40, 24-tooth ratchet one or more teeth per stroke.