Shaft spacers for Ø3, Ø5 and Ø8 shafts, 1 to 5 mm — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/shaft-spacers/  (CC BY 4.0)
Basis: Flat rings at the shaft Ø, OD = shaft + 5, in 1, 2, 3 and 5 mm thicknesses
Catalog version: 2026-10-20

Sizes: see table below
- Flat rings: Ø3 × Ø8, Ø5 × Ø10 and Ø8 × Ø13 (bore × OD), each 1, 2, 3 and 5 thick.
- Stacked on the shaft they set the 1 mm gaps between tower, web, rod and flywheel; any gap from 1 to 11 mm is a sum of the four.
- The bore is the shaft Ø; the fit is listed under Mating features.

shaft Ø  OD  thicknesses
3  8  1 / 2 / 3 / 5
5  10  1 / 2 / 3 / 5
8  13  1 / 2 / 3 / 5

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, 12 parts): https://xemstudio.com/files/hardware/shaft-spacers/index.json
API: https://xemstudio.com/api/geometry?object=shaft-spacers