Dirk 3D Printed Electric Motor BOM: Difference between revisions
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**[https://www.amazon.com/Pack-608-2RS-Ball-Bearing-Skateboards/dp/B07C6FL8TW/ref=lp_16411051_1_3?s=industrial&ie=UTF8&qid=1596637217&sr=1-3 Amazon Source ~10 USD for 20; ~0.50 USD per bearing] | **[https://www.amazon.com/Pack-608-2RS-Ball-Bearing-Skateboards/dp/B07C6FL8TW/ref=lp_16411051_1_3?s=industrial&ie=UTF8&qid=1596637217&sr=1-3 Amazon Source ~10 USD for 20; ~0.50 USD per bearing] | ||
**20 cents each - [https://www.amazon.com/608-2RS-Skateboard-Bearing-Rolling-bearings/dp/B073ST742Z/ref=asc_df_B073ST742Z/?tag=hyprod-20&linkCode=df0&hvadid=243905197353&hvpos=&hvnetw=g&hvrand=2550611437824702121&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9023315&hvtargid=pla-458119845268&psc=1] | **20 cents each - [https://www.amazon.com/608-2RS-Skateboard-Bearing-Rolling-bearings/dp/B073ST742Z/ref=asc_df_B073ST742Z/?tag=hyprod-20&linkCode=df0&hvadid=243905197353&hvpos=&hvnetw=g&hvrand=2550611437824702121&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9023315&hvtargid=pla-458119845268&psc=1] | ||
* 8 Disc magnets per rotor (8 mm thickness, 20mm diameter) [https://www.aliexpress.com/item/ | * 8 Disc magnets per rotor (8 mm thickness, 20mm diameter) [https://www.aliexpress.com/item/32797367574html?spm=a2g0s.12269583.0.0.23ca74d74jPZDB 26.42 USD for 20]. Much more for USA source - $3 each - so $24/motor. [https://appliedmagnets.com/neodymium-magnets-3-4-in-x-3-8-in-rare-earth-disc-p-689.html] | ||
**Ebay - around $2 equivalent - [https://www.ebay.com/itm/Lot-50-100-Pcs-Round-Disc-Block-Magnets-Cylinder-Rare-Earth-Neodymium-N52-N48/192608399976?hash=item2cd85af268:g:yV8AAOSwXclbV-yu&var=492744901667] | **Ebay - around $2 equivalent - [https://www.ebay.com/itm/Lot-50-100-Pcs-Round-Disc-Block-Magnets-Cylinder-Rare-Earth-Neodymium-N52-N48/192608399976?hash=item2cd85af268:g:yV8AAOSwXclbV-yu&var=492744901667] | ||
* Copper wire (0,2 mm diameter max. definitely not more because you will get eddy current issues) [https://www.koper-draad.nl/product/koperlakdraad-02-mm-awg-32-lengte-1730-meter/] (Enameled copper wire ie [[Magnet Wire]] ) | * Copper wire (0,2 mm diameter max. definitely not more because you will get eddy current issues) [https://www.koper-draad.nl/product/koperlakdraad-02-mm-awg-32-lengte-1730-meter/] (Enameled copper wire ie [[Magnet Wire]] ) | ||
Revision as of 16:10, 23 August 2020
- 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) 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]