Dead-beat (Graham) anchor for the 30-tooth Ø50 escape wheel — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/deadbeat-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 arcs centred on the pivot (entry pallet: outer arc R25.8; exit pallet: inner arc R24.2), so a locked tooth exerts no turning force: the 'dead beat'.
- 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. 289: figure, his text and an animation — web — Publisher's page; dimensions are facts — https://507movements.com/mm_289.html
- Xem Studio: drawing — web — Publisher's page; dimensions are facts — https://xemstudio.com/objects/deadbeat-escapement-mechanism/

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