Tightener slide 60 × 20 × 10 with Ø8 stub axle, two Ø6 rod bores and a pin tab — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/tightener-slide-8mm-stub/  (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 60.0, width 46.0, height 31.0
- Block that slides on two Ø6 rods (bores along its length, 44 mm apart) and carries a pulley on a Ø8 × 21 stub axle; a tab below has a Ø3 hole 30 mm from the axle for the hanging weight's pin.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

dimension  value
block  60 × 20 × 10 mm
stub axle  Ø8 × 21
rod bores  2 × Ø6, 44 mm apart
weight pin  Ø3, 30 mm below the axle

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/tightener-slide-8mm-stub/index.json
API: https://xemstudio.com/api/geometry?object=tightener-slide-8mm-stub