Flat belt 16 × 1.5 for two Ø40 pulleys at 120 mm (loop drawn on the pulleys) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/flat-belt-1-5x16-pulleys-40-120/  (CC BY 4.0)
Basis: Xem Studio design following Brown's figure (1868); true size, no printing allowance
Catalog version: 2026-10-20

Overall (mm): length 163.0, width 43.0, height 16.0
- Open flat belt 16 mm wide, 1.5 mm thick, drawn wrapped on two Ø40 pulleys 120 mm apart: inside length = 2C + π(D₁ + D₂)/2 = 240 + 125.66 = 365.66 mm (equal pulleys).
- 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
inside length  365.66 mm
for  Ø40 + Ø40 at 120 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. 8: figure, his text and an animation — web — Publisher's page; dimensions are facts — https://507movements.com/mm_008.html
- Xem Studio: drawing — web — Publisher's page; dimensions are facts — https://xemstudio.com/objects/stepped-cone-pulleys-mechanism/

Free files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/flat-belt-1-5x16-pulleys-40-120/index.json
API: https://xemstudio.com/api/geometry?object=flat-belt-1-5x16-pulleys-40-120