Two-lobe stamp cam R14 → R30, 8 thick, Ø8 bore — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/stamp-cam-2-lobe-r14-r30-bore8/  (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 45.96, width 55.17, height 8.0
- Two lobes, each rising from R14 to R30 over 140° (cycloidal) and dropping straight back: the stamp's tappet rides up the lobe and falls off its tip twice per turn.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

dimension  value
lobes  2
lift  16 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. 85: figure, his text and an animation — web — Publisher's page; dimensions are facts — https://507movements.com/mm_085.html
- Xem Studio: drawing — web — Publisher's page; dimensions are facts — https://xemstudio.com/objects/stamp-cam-mechanism/

Free files (Xem Studio Design License, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/stamp-cam-2-lobe-r14-r30-bore8/index.json
API: https://xemstudio.com/api/geometry?object=stamp-cam-2-lobe-r14-r30-bore8