Flanged flat-belt pulley Ø30, 16 mm face, Ø6 bore — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/flanged-flat-pulley-30-bore6/  (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 36.0, width 36.0, height 20.0
- Ø30 × 16 mm straight face between two Ø36 × 2 flanges (20 wide overall), Ø6 bore: the jockey (tightening) pulley that presses on the back of a 16 mm flat belt, same face and flange proportions as the catalog Ø40 and Ø80 pulleys.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

dimension  value
face  Ø30 × 16 mm
flanges  Ø36 × 2
bore  Ø6

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. 5: figure, his text and an animation — web — Publisher's page; dimensions are facts — https://507movements.com/mm_005.html
- Xem Studio: drawing — web — Publisher's page; dimensions are facts — https://xemstudio.com/objects/jockey-pulley-belt-tightener-mechanism/

Free files (Xem Studio Design License, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/flanged-flat-pulley-30-bore6/index.json
API: https://xemstudio.com/api/geometry?object=flanged-flat-pulley-30-bore6