Slotted crank arm, Ø5 hub, 3 mm slot from 6 to 19 mm — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/slotted-crank-arm-30/  (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 37.0, width 14.0, height 5.0
- Arm on a Ø14 hub (Ø5 bore) with a 3 mm wide slot whose centre line runs from 6 to 19 mm out: a Ø3 pin from another crank slides in it and drives it round.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

dimension  value
hub  Ø14, Ø5 bore
slot  3 × 13 mm (centres 6–19 mm)
thickness  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. 220: figure, his text and an animation — web — Publisher's page; dimensions are facts — https://507movements.com/mm_220.html
- Xem Studio: drawing — web — Publisher's page; dimensions are facts — https://xemstudio.com/objects/offset-slotted-crank-mechanism/

Free files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/slotted-crank-arm-30/index.json
API: https://xemstudio.com/api/geometry?object=slotted-crank-arm-30