Two-lobed wiper cam, base R12, tip R24, 10 thick, Ø8 bore — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/wiper-cam-2-lobe-r12-r24-b8/  (sheet CC BY 4.0; files Xem Studio Design License, https://xemstudio.com/license/)
Basis: Xem Studio design following Brown's figure (1868); true size, no printing allowance
Catalog version: 2026-10-20

Overall (mm): length 48.0, width 24.0, height 10.0
- 10 mm plate cam with two lobes: a R12 base circle, a straight rising flank and a R24 tip arc of 10° on each lobe, falling straight back to the base — the classic hammer wiper that lifts a lever and lets it drop twice per turn. Ø8 bore.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

dimension  value
base circle  R12
lobe tip  R24, 10° arc
lobes  2
thickness  10 mm
bore  Ø8

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. 353: figure, his text and an animation — web — Publisher's page; dimensions are facts — https://507movements.com/mm_353.html
- Xem Studio: drawing — web — Publisher's page; dimensions are facts — https://xemstudio.com/objects/trip-hammer-mechanism/

Free files (Xem Studio Design License, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/wiper-cam-2-lobe-r12-r24-b8/index.json
API: https://xemstudio.com/api/geometry?object=wiper-cam-2-lobe-r12-r24-b8