Stamp: 8 × 8 stem 160 long with a 48 × 10 tappet and a 16 × 30 head — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/stamp-stem-8x8-160-tappet-head/  (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 52.0, width 190.0, height 8.0
- Vertical 8 × 8 stem running in two guides, with a tappet that the cam lifts and a heavy head at the foot that falls on the work.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

dimension  value
stem  8 × 8 × 160
tappet  48 × 10 at 60 mm
head  16 × 30

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-stem-8x8-160-tappet-head/index.json
API: https://xemstudio.com/api/geometry?object=stamp-stem-8x8-160-tappet-head