Uniform-motion yoke plate 60 × 40 × 8 with closed channel for a 12 mm crank — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/uniform-motion-yoke-plate-60x40-r12/  (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 40.0, height 8.0
- 60 × 40 × 8 plate with a closed 3 mm channel through it whose centre line is the crank-pin path drawn in the plate's own frame when the plate moves at constant speed: x = r cos θ − X(θ), y = r sin θ with X(θ) linear in θ (24 mm out over half a turn, back over the other half). Two Ø5 bores along X (y = ±17) for the guide pillars.
- The channel is a rounded diamond, 51 × 27 mm over its walls; the pin changes direction at the two pointed ends.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

dimension  value
plate  60 × 40 × 8 mm
channel  3 mm wide, closed loop 51 × 27
crank radius  12 mm
guide bores  2 × Ø5 at y = ±17

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. 354: figure, his text and an animation — web — Publisher's page; dimensions are facts — https://507movements.com/mm_354.html
- Xem Studio: drawing — web — Publisher's page; dimensions are facts — https://xemstudio.com/objects/uniform-motion-crank-yoke-mechanism/

Free files (Xem Studio Design License, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/uniform-motion-yoke-plate-60x40-r12/index.json
API: https://xemstudio.com/api/geometry?object=uniform-motion-yoke-plate-60x40-r12