Cone friction clutch on a feathered shaft — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/cone-friction-clutch-mechanism/  (sheet CC BY 4.0; files Xem Studio Design License, https://xemstudio.com/license/)
Basis: Xem Studio design following Brown No. 47 (1868)
Catalog version: 2026-10-20

Sizes: see table below
- A cone sliding on a feather key on one shaft is pushed by a lever-worked fork into a matching cup on the other: the wedge multiplies the pressing force by 1/sin α at the cone, so a modest push gives a strong friction drive, and it can be engaged while running with some slip.
- Here a 12.5° cone (Ø40 → Ø32.91 over 16 mm) and cup (Ø50); Ø8 shafts end to end, the driven one keyed (2 × 2 feather key). Drawn engaged: the cones touch over their whole length.
- Brown's No. 47 (friction clutch box engaged by a lever, on a feathered shaft).
- Parts (each has its own page): cone-clutch-cup-d50-12-5deg-bore8, cone-clutch-cone-d40-12-5deg-keyed8, keyed-shaft-8x100-key2, feather-key-2x2x30, linear-shafts-h6.
- Brown's movement No. 47 (1868) shows it; this model is a Xem Studio design following his figure, every part at true size.

parameter  value
cone half-angle  12.5°
cone  Ø40 → Ø32.91 × 16
wedge gain  1/sin 12.5° = 4.6
shafts  Ø8, key 2 × 2

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

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