Trip-hammer helve 200 × 12 × 8, Ø5 pivot 80 mm from the tail — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/trip-hammer-helve-200x12/  (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 200.0, width 12.0, height 8.0
- 200 × 12 × 8 bar pivoted on a Ø5 pin 80 mm from its tail end (first-order lever: the wiper presses the tail down, the 120 mm head end rises; when the wiper slips off, the head falls).
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

dimension  value
bar  200 × 12 × 8 mm
pivot  Ø5, 80 mm from the tail
arms  80 (tail) / 120 (head)

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/trip-hammer-helve-200x12/index.json
API: https://xemstudio.com/api/geometry?object=trip-hammer-helve-200x12