Rocking link 170 mm (crank to rocker) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/marble-engine-rocking-link/  (CC BY 4.0)
Basis: My geometry: same section as the pin-end con-rods (8 × 5, Ø3 ends)
Catalog version: 2026-10-20

Sizes: see table below
- 170 mm between Ø3 holes; from the crank pin that leads the power pin by 90° to the rocker's lever pin. Length chosen so the rocker's mean angle is level.

feature  value_mm
centres  170.0
section  8 × 5
holes  Ø3

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Long Earth Society: Engine builds — web, video — LES site — https://longearthsociety.com/engineering/

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