Band 16 × 1.5 for the R50 segment and two Ø40 pulleys (drawn as a loop) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/band-16x1-5-segment-r50-two-pulleys-40/  (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 113.0, width 183.0, height 16.0
- 16 × 1.5 mm band, 510.14 mm along its inner face, fixed at the two ends of the segment's rim and run under two Ø40 pulleys 70 mm apart, 110 mm below the pivot; it wraps 174.83° of the segment and 92.59° of each pulley.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

dimension  value
width × thickness  16 × 1.5 mm
length  510.14 mm

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/band-16x1-5-segment-r50-two-pulleys-40/index.json
API: https://xemstudio.com/api/geometry?object=band-16x1-5-segment-r50-two-pulleys-40