Cardan joint cross (spider) 14 × 14, 7 mm arms, Ø3 pin holes — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/cardan-spider-14/  (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 14.0, width 14.0, height 7.0
- Cross of two 7 × 7 mm arms, 14 mm across (the fork gap): a Ø3 hole straight through one arm for the long pin (dowel 3 × 20) and two Ø3 holes in the other arm from its ends to 2 mm from the centre for two short pins (dowel 3 × 10); the four pin ends are the trunnions the yokes turn on.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

dimension  value
arms  7 × 7 mm, 14 across
through hole  Ø3 along X
blind holes  2 × Ø3, 5 deep, along Y

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. 50: figure, his text and an animation — web — Publisher's page; dimensions are facts — https://507movements.com/mm_050.html
- Xem Studio: drawing — web — Publisher's page; dimensions are facts — https://xemstudio.com/objects/universal-joint-mechanism/

Free files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/cardan-spider-14/index.json
API: https://xemstudio.com/api/geometry?object=cardan-spider-14