Weight Ø40 × 40 with a Ø3 top socket (394.58 g in steel) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/tackle-weight-d40x40-socket/  (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 40.0
- Ø40 × 40 mm cylinder with a Ø3 × 8 deep socket in the top centre for a block's stem or a rope end: 394.58 g in steel, 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
socket  Ø3 × 8 deep
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. 12: figure, his text and an animation — web — Publisher's page; dimensions are facts — https://507movements.com/mm_012.html
- Xem Studio: drawing — web — Publisher's page; dimensions are facts — https://xemstudio.com/objects/single-fixed-pulley-mechanism/

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