Mug LTD crank pedestal (one bearing block, two 623s) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/mug-ltd-crank-pedestal/  (CC BY 4.0)
Basis: My geometry: crank axis 169 above the top plate, set by the 5 mL glass syringe (105 long) plus clevis and 45 mm con-rod; both cranks overhung, one each side of the block
Catalog version: 2026-10-20

Sizes: see table below
- Both cranks are overhung: the flywheel crank on the displacer side and a crank disc on the syringe side, with a Ø3 × 30 shaft in two 623s in one 10 mm bearing block between them. No con-rod crosses the shaft, so nothing in the mechanism meets it at top dead centre.
- The post stands beside the syringe (y −27..−13) so the plunger clevis and barrel collar pass it; the foot's two arms reach round the syringe socket boss to two M3 × 8 at (35.5, ±20.5), through the top plate into tapped holes in the ring.
- The crank height comes from the glass syringe: its 105 mm barrel stands in the top plate, the plunger clevis pin is 12 above the plunger collar, and the con-rod is 45.

feature  value_mm
crank axis above top plate  169.0
bearing block  x 15.5..25.5
bearings  2 × 623

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/mug-ltd-crank-pedestal/index.json
API: https://xemstudio.com/api/geometry?object=mug-ltd-crank-pedestal