Cone-clutch sliding cone Ø40, 12.5°, with Ø32 × 4 fork groove, keyed Ø8 bore — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/cone-clutch-cone-d40-12-5deg-keyed8/  (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 40.0, width 40.0, height 30.0
- Male cone matching the cup (12.5°, Ø40 → Ø32.91 over 16 mm) with a 4 mm groove for the shifting fork; its Ø8 bore has a 2 × 1 keyway so it slides on a feather key and turns with its shaft.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

dimension  value
cone  12.5°, Ø40 → Ø32.91, 16 long
fork groove  Ø28 root, 4 wide
bore  Ø8, keyway 2 × 1

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. 47: figure, his text and an animation — web — Publisher's page; dimensions are facts — https://507movements.com/mm_047.html
- Xem Studio: drawing — web — Publisher's page; dimensions are facts — https://xemstudio.com/objects/cone-friction-clutch-mechanism/

Free files (Xem Studio Design License, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/cone-clutch-cone-d40-12-5deg-keyed8/index.json
API: https://xemstudio.com/api/geometry?object=cone-clutch-cone-d40-12-5deg-keyed8