Centre-hole link, 80 mm (three Ø3 holes: −40, 0, +40) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/centre-hole-link-80/  (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 90.0, width 10.0, height 5.0
- 10 × 5 mm flat link, 80 mm between its end holes, with a third Ø3 hole in the middle: the bar of lazy tongs, parallel rulers, the Scott Russell linkage and the elliptic trammel.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

dimension  value
end hole centres  80 mm
holes  3 × Ø3 at −40, 0, +40 mm
section  10 × 5 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. 144: figure, his text and an animation — web — Publisher's page; dimensions are facts — https://507movements.com/mm_144.html
- Xem Studio: drawing — web — Publisher's page; dimensions are facts — https://xemstudio.com/objects/lazy-tongs-mechanism/

Free files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/centre-hole-link-80/index.json
API: https://xemstudio.com/api/geometry?object=centre-hole-link-80