Recoil anchor for the 30-tooth Ø50 escape wheel — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/recoil-anchor-for-30t-d50/  (CC BY 4.0)
Basis: Xem Studio design following Brown's figure (1868); true size, no printing allowance
Catalog version: 2026-10-20

Overall (mm): length 44.96, width 25.47, height 3.0
- 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).

dimension  value
pivot above wheel centre  35.36 mm
span  7½ teeth (90°)
pallet thickness  1.6 mm
pivot hole  Ø3
thickness  3 mm

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Henry T. Brown (1868, public domain): Five Hundred and Seven Mechanical Movements — scan on archive.org — web — Publisher's page; dimensions are facts — https://archive.org/details/fivehundredseven00browiala
- 507movements.com: Brown's movement No. 288: figure, his text and an animation — web — Publisher's page; dimensions are facts — https://507movements.com/mm_288.html
- Xem Studio: drawing — web — Publisher's page; dimensions are facts — https://xemstudio.com/objects/recoil-anchor-escapement-mechanism/

Free files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/recoil-anchor-for-30t-d50/index.json
API: https://xemstudio.com/api/geometry?object=recoil-anchor-for-30t-d50