Rocking segment lever, R50 rim × 16, Ø8 pivot, 100 mm handle — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/rocking-segment-lever-r50/  (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 100.0, width 110.0, height 23.0
- A lever whose end is a circular segment of 50 mm radius (198.83° of rim, 16 mm wide for a 16 mm band) on a Ø8 pivot, with a 10 × 5 handle 100 mm long on a Ø20 boss, above the band's plane: a band fixed to the two ends of the rim and run round pulleys below turns them as the lever rocks.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

dimension  value
rim radius  50 mm
rim arc  198.83°
rim width  16 mm
pivot  Ø8, Ø20 boss
handle  10 × 5 × 100 mm, z 20..25

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. 6: figure, his text and an animation — web — Publisher's page; dimensions are facts — https://507movements.com/mm_006.html
- Xem Studio: drawing — web — Publisher's page; dimensions are facts — https://xemstudio.com/objects/segment-lever-band-pulleys-mechanism/

Free files (Xem Studio Design License, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/rocking-segment-lever-r50/index.json
API: https://xemstudio.com/api/geometry?object=rocking-segment-lever-r50