Scotch-yoke crosshead 48 × 14 × 8, 3 mm slot, two Ø5 guide bores — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/scotch-yoke-crosshead-48x14-b5/  (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 48.0, width 14.0, height 8.0
- 48 × 14 × 8 block with a 30 × 3 mm through slot across it (the crank pin slides in it) and two Ø5 bores 36 mm apart along its length for the pillar guides it runs on.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

dimension  value
block  48 × 14 × 8 mm
slot  30 × 3 mm (Ø3 crank pin)
guide bores  2 × Ø5 at x = ±18

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. 331: figure, his text and an animation — web — Publisher's page; dimensions are facts — https://507movements.com/mm_331.html
- Xem Studio: drawing — web — Publisher's page; dimensions are facts — https://xemstudio.com/objects/scotch-yoke-mechanism/

Free files (Xem Studio Design License, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/scotch-yoke-crosshead-48x14-b5/index.json
API: https://xemstudio.com/api/geometry?object=scotch-yoke-crosshead-48x14-b5