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Recoil anchor for the 30-tooth Ø50 escape wheel

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

Also called: recoil anchor, clock anchor, escapement pallets, áncora de escape de retroceso, Anker (rückfallend)

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

length
44.96 mm
width
25.47 mm
height
3.0 mm

Notes

  • 3 mm anchor pivoting on a Ø3 pin 35.36 mm above the escape wheel's centre, its two pallets spanning 7½ teeth (90°), each pallet 1.6 mm thick with its impulse face at the deep end. The locking faces are straight, their deep ends 0.3 mm off the pivot circle, so the swinging anchor pushes the wheel back a little after locking: the recoil.
  • Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

Recoil anchor for the 30-tooth Ø50 escape wheel size chart

dimensionvalue
pivot above wheel centre35.36 mm
span7½ teeth (90°)
pallet thickness1.6 mm
pivot holeØ3
thickness3 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. 288: 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

recoil-anchor-for-30t-d50anchor, z 0..3, pivot at (0, 35.36)STEP · STL
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Plain text: sheet.txt · JSON: /api/geometry?object=recoil-anchor-for-30t-d50

Recoil anchor for the 30-tooth Ø50 escape wheel, isometric render of a generated part
Render of recoil-anchor-for-30t-d50 from the free STEP; not to scale.

Fits with

Recoil anchor escapement: escape wheel and anchor, isometric render of a generated part
Recoil anchor escapement: escape wheel and anchor5 sizes★ 1 file

Questions

What is a recoil anchor?

3 mm anchor pivoting on a Ø3 pin 35.36 mm above the escape wheel's centre, its two pallets spanning 7½ teeth (90°), each pallet 1.6 mm thick with its impulse face at the deep end. The locking faces are straight, their deep ends 0.3 mm off the pivot circle, so the swinging anchor pushes the wheel back a little after locking: the recoil.