Sun-and-planet rod, 100 mm, with Ø10 × 13 planet boss — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/sun-and-planet-rod-100/  (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 118.0, width 18.0, height 18.0
- 18 × 5 mm rod, 100 mm between the planet boss and a Ø3 pin hole: the planet gear is fixed on the Ø10 × 13 boss (it does not turn on the rod), the arm turns on the boss above the gear. Rocking the far end drives the sun round.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

dimension  value
length (centres)  100 mm
boss  Ø10 × 13 mm
end hole  Ø3

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. 39: figure, his text and an animation — web — Publisher's page; dimensions are facts — https://507movements.com/mm_039.html
- Xem Studio: drawing — web — Publisher's page; dimensions are facts — https://xemstudio.com/objects/sun-and-planet-gear-mechanism/

Free files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/sun-and-planet-rod-100/index.json
API: https://xemstudio.com/api/geometry?object=sun-and-planet-rod-100