Hanging weight Ø40 × 40 with a pin lug (394.58 g in steel) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/hanging-weight-d40x40-lug/  (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 40.0, width 40.0, height 52.0
- Ø40 × 40 mm cylinder with a 10 × 5 × 12 lug on top and a Ø3 cross hole 7 mm above the top face: hangs from a Ø3 pin (rope eye, block or slide). 394.58 g in steel (7.85 g/cm³), 136.13 g in aluminium.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

dimension  value
body  Ø40 × 40 mm
lug  10 × 5 × 12, Ø3 hole
mass (steel)  394.58 g

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. 23: figure, his text and an animation — web — Publisher's page; dimensions are facts — https://507movements.com/mm_023.html
- Xem Studio: drawing — web — Publisher's page; dimensions are facts — https://xemstudio.com/objects/weighted-belt-tightener-mechanism/

Free files (Xem Studio Design License, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/hanging-weight-d40x40-lug/index.json
API: https://xemstudio.com/api/geometry?object=hanging-weight-d40x40-lug