Proportional compass leg 160 × 14 × 5, pointed, 6.2 mm slot 100 long — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/proportional-compass-leg-160-slot6/  (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 160.0, width 14.0, height 5.0
- 160 × 14 × 5 leg pointed at both ends with a 6.2 × 106 mm slot along its middle: the pivot slide block runs in it, so the ratio of the two point spacings can be set anywhere from 1 : 1 (pivot central) to about 5 : 1.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

dimension  value
leg  160 × 14 × 5 mm
slot  6.2 mm, centres ±50
points  both ends

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. 409: figure, his text and an animation — web — Publisher's page; dimensions are facts — https://507movements.com/mm_409.html
- Xem Studio: drawing — web — Publisher's page; dimensions are facts — https://xemstudio.com/objects/proportional-compasses-mechanism/

Free files (Xem Studio Design License, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/proportional-compass-leg-160-slot6/index.json
API: https://xemstudio.com/api/geometry?object=proportional-compass-leg-160-slot6