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Ø400 flywheel on a Ø12 shaft
What does a 400 mm flywheel for a 12 mm shaft look like? · Hardware · basis: Exact geometry
Long Earth Society build part. Parts of the HTD 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
- 1 in table
Notes
- Rim r 175..200 × 30 wide, 5 web, Ø50 × 40 hub, two M6 grubs. J = 0.104 kg·m² (3.9 kg) at 2.7 g/cm³, 0.305 kg·m² (11.3 kg) at 7.9 g/cm³.
- On the HTD it hangs outside the seal cap at x 186.5..226.5; a slow flat engine needs the inertia (the speed swing is on the list page).
Sizes
| od_mm | rim_mm | web_mm | hub_mm | J_kgm2_2.7 | J_kgm2_7.9 |
|---|---|---|---|---|---|
| 400.0 | 175–200 × 30 | 5.0 | Ø50 × 40 | 0.104 | 0.305 |
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 |
|---|---|---|---|---|
| bore | Ø12 × 40 | Ø12 shaft, two M6 grubs (drawn Ø6) | slide | all |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Long Earth Society | 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
| flywheel-400-b12 | Ø400 flywheel: rim r 175..200 × 30, web 5, hub Ø50 × 40, Ø12 bore, two M6 tapped radial holes | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=flywheel-400-12mm-shaft
Fits with
Questions
How heavy is it?
3.9 kg at 2.7 g/cm³, 11.3 kg at 7.9 g/cm³.