Dirk 3D Printed Electric Motor BOM
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- 3 phase no feedback Controller - 12V 30A - [1] $6.42 + $2.30 Shipping
- Fidget Spinner Bearings (22mm total diameter, 8mm bore and 7mm width)
- Amazon Source ~10 USD for 20; ~0.50 USD per bearing
- 20 cents each - [4]
- 8 Disc magnets per rotor (8 mm thickness, 20mm diameter) [https://www.aliexpress.com/item/32797367574
.html?spm=a2g0s.12269583.0.0.23ca74d74jPZDB 26.42 USD for 20]. Much more for USA source - $3 each - so $24/motor. [5]
- Ebay - around $2 equivalent - [6]
- Copper wire (0,2 mm diameter max. definitely not more because you will get eddy current issues) [7] (Enameled copper wire ie Magnet Wire )
- Cost of $1-2 per motor using the $7 spools.
- Bit of brass tubing (4 mm outer diameter) to connect the coil endings in. [8]
- Solder
- Glue (the type that sticks)
- 8 mm metal rod for an axle (offcuts from universal axis are great for this)
- 3d printing filament (kg estimate, also infill needed)
- a little bit of epoxy to glue the magnets in place [9]