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Coil bobbin Ø10 core × 8 mm, Ø13 flanges
What size coil bobbin for a small axial flux generator? · Hardware · basis: Bobbin sized to the stator pocket: Ø13 flanges, Ø10 core, 8 long, wire slot in one flange
Long Earth Society build part. The flywheel alternator on the LES generator builds. 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
- The bobbin has a hollow Ø10 core (0.5 mm wall) 8 mm long, closed by two Ø13 × 0.8 mm flanges.
- A 1.2 mm slot across one flange lets the start of the winding out.
- The winding window is 1.5 mm deep (Ø10 to Ø13) and 6.4 mm long between the flanges.
- The Ø13 flanges slide into the Ø13 pockets of the axial-flux stator.
Sizes
| feature | size_mm |
|---|---|
| core | Ø10 × 8 (Ø9 hollow) |
| flanges | Ø13 × 0.8 |
| winding window | 1.5 deep × 6.4 long |
| wire slot | 1.2 wide |
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 |
|---|---|---|---|---|
| bobbin flanges | Ø20 | stator coil pocket Ø20 | slide | coil-bobbin-* |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Wikipedia | Axial flux motor | web | CC BY-SA 4.0 (text) |
| Wikipedia | Alternator | web | CC BY-SA 4.0 (text) |
| Hugh Piggott | A Wind Turbine Recipe Book (axial-flux alternator design) | web, PDF | Author's site verify |
| Long Earth Society | Engine and rig 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
| coil-bobbin-10x8 | coil bobbin Ø10 core (Ø7 bore) × 8 long = the stator thickness, Ø20 × 0.8 flanges, winding window 5 radial × 6.4 axial (32 mm²), 1.2 mm lead slot in one flange | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=coil-bobbin
How it fits
Goes in or on
Axial-flux stator platesØ13 flanges in the Ø13 coil pockets (slide)Also needed
Axial-flux rotor platesmagnets pass over the coil facesQuestions
What is the winding space on the bobbin?
1.5 mm radially (Ø10 core to Ø13 flange) by 6.4 mm between the flanges.
Does the bobbin fit the stator?
Yes: its Ø13 flanges match the Ø13 coil pockets (slide, see Mating features).