Friction wheel Ø30 × 10, Ø5 bore — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/friction-wheel-30x10/  (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 30.0, width 30.0, height 10.0
- Plain Ø30 × 10 mm wheel, Ø5 bore: drives another wheel by rolling contact on its rim (face it with rubber or leather for grip, as Brown says).
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

dimension  value
diameter  30 mm
width  10 mm
bore  Ø5

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. 32: figure, his text and an animation — web — Publisher's page; dimensions are facts — https://507movements.com/mm_032.html
- Xem Studio: drawing — web — Publisher's page; dimensions are facts — https://xemstudio.com/objects/friction-wheels-mechanism/

Free files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/friction-wheel-30x10/index.json
API: https://xemstudio.com/api/geometry?object=friction-wheel-30x10