Lewis centre piece 10 × 14 × 50, Ø6 pin hole — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/lewis-centre-piece-10x14x50/  (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 10.0, width 14.0, height 50.0
- Parallel-sided 10 × 14 × 50 bar with a Ø6 cross hole 8 mm from its top: driven down between the two side wedges it forces them out against the dovetail's walls; the shackle pin goes through all three pieces.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

dimension  value
bar  10 × 14 × 50 mm
hole  Ø6, 8 mm from the top

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. 493: figure, his text and an animation — web — Publisher's page; dimensions are facts — https://507movements.com/mm_493.html
- Xem Studio: drawing — web — Publisher's page; dimensions are facts — https://xemstudio.com/objects/lewis-stone-lifter-mechanism/

Free files (Xem Studio Design License, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/lewis-centre-piece-10x14x50/index.json
API: https://xemstudio.com/api/geometry?object=lewis-centre-piece-10x14x50