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Shaft adapter Ø5 to Ø8 × 20
How does an 8 mm bore flywheel go on a 5 mm crankshaft? · Hardware · basis: Sleeve with a Ø5 bore and Ø8 OD, two M3 radial holes
Long Earth Society build part. The connectors between rods, cranks and drives on the LES engines. The engines
Exact dimensions. Every file is drawn at true size with no printing tolerance. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your printer's or process's clearance before making the part. Mating features
- sizes
- 4 in table
Notes
- A sleeve Ø8 OD × Ø5 bore × 20 long.
- Two Ø2.5 radial holes (M3 tap drill) through both walls, 5 mm from each end: one grub bears on the Ø5 shaft's flat, the other lines up under the flywheel's set screw.
- It puts any Ø8-bore hub (the Ø80–Ø150 spoked flywheels) on a Ø5 crankshaft.
Sizes
| feature | value_mm |
|---|---|
| OD | 8 |
| bore | 5 |
| length | 20 |
| grub holes | 2 × Ø2.5 at 5 and 15 |
Mating features
Drawn at the exact size. Open press, slide, run and socket features by your process's clearance; leave designed gaps and clamp fits as drawn.
| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| shaft-adapter bore | Ø5 | Ø5 crankshaft | slide | shaft-adapter-* |
| shaft-adapter OD | Ø8 | Ø8 flywheel hub | slide | shaft-adapter-* |
| shaft-adapter grub holes | Ø2.5 | M3 tap drill | designed | shaft-adapter-* |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Long Earth Society | Tri-clamp Stirling engine builds | web, video | LES site |
Free files
★ Free files 1 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| shaft-adapter-5-to-8 | Ø5 → Ø8 shaft adapter × 20 with two M3 grubs: puts a Ø8-bore flywheel (Ø80–150) on a Ø5 crankshaft | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=shaft-adapter-5-to-8mm
How it fits
Goes in or on
Crankshafts Ø3, Ø5 and Ø8 with full-length D-flatØ5 bore on the D-flat shaftConnects to
Spoked flywheels Ø50 to Ø150 × 10Ø8 OD in the flywheel's Ø8 boreAlso needed
Set screws, M3–M8two M3 grubsYou might also need
Questions
The flywheel has an 8 mm bore and the crankshaft is 5 mm. What goes between?
This adapter: Ø5 bore, Ø8 OD, 20 long, two M3 grub holes.
How long is the shaft adapter?
20 mm, with grub holes 5 mm in from each end.