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I found a surplus electric scooter motor rated at 600 W and replaced the motor on my Harbor freight mini mill with this powerful motor. One great feature is the emergency stop. And if you stall the motor, it shuts down. After it stalls, it will take 10 seconds before you can restart the motor. If you leave the speed knob turned up after you hit the stop button, the motor has holding torque until you turn the knob all the way down.

Brushless 600 what DC motor.
NOTE! AS OF AUGUST 2023 THEY ARE NO LONGER BE AVAILABLE! You may be able to find something similar if you search the web.

Some people have found a similar motor and you will need a 24VDC 27 Amp power supply to power it. I found one available from DigiKey for over $210, here's a link:
https://www.digikey.com/en/products/d...
Please be sure that the motor you have found runs on 24 V DC and not a higher voltage for instance.

Duraflex cogged 2L130 Polyurethane cog belt: https://www.grainger.com/product/DAYT...

The Little Machine Shop belt drive kit is here:
https://www.littlemachineshop.com/pro...

There is a guy in Maine who repairs mini mill and mini lathe motor control boards and has upgraded ones too: http://olduhfguy.com/

Tools I own, use in my videos and recommend (as an Amazon Affiliate, I earn from qualifying purchases.)

Lathe centering Bump Roller: https://amzn.to/3LnIiVq
Center finder for side of round stock (not super accurate!): https://amzn.to/3YZgRp4
Center finder for end of round bar: https://amzn.to/3ZgkOW7
Magnetic Base Adjustable Metal Test Indicator Holder: https://amzn.to/3JTsKI8
6 Piece Spotting Drill Bit Set, High Speed Steel, Short Length 120 degree, Uncoated: https://amzn.to/3YDSw7I
Taytools 11/2 Inch Machinist Center Finder https://amzn.to/3Sw1t0P
Mitutoyo Edge finder tool: https://amzn.to/3LinTkC
iGaging 6" digital caliper: https://amzn.to/3yHg8x5
7 Piece center drill bit set: https://amzn.to/3mqSIZT
Grizzly wiggler/center finder 5 piece set for insides of circular holes: https://amzn.to/3IAmLpM
Bahco Smooth Cut Lathe File: https://amzn.to/404vVCC
3pcs 3/8"/10mm Shank Indexable Carbide Lathe Turning Tools Insert Holder Bit Set: https://amzn.to/3CS95nK
5Pcs 3/8" Inch Indexable Carbide Insert cutters with TCMT110204 Carbide Inserts: https://amzn.to/3WeZmyW
2" diameter Indexable End Mill with 3 Tpg32 Carbide Inserts, 3/4" Straight Shank: https://amzn.to/3GNLbuH
Ball Turning Attachment For 7 x 14 / 7x16 Mini Lathe: https://amzn.to/3ZDscf3
2" Boring Head R8 Shank 1/2" Carbide Boring Bar Set: https://amzn.to/3J1wGpQ
Keyless 1/32" 5/8" Drill Chuck with R8 Shank Adapter: https://amzn.to/3CTUetb
3 Spring Caliper set 8" / 200mm Inside/Outside/Divider: https://amzn.to/3H79nts
Sewing Machine Light LED Light with flex gooseneck: https://amzn.to/3XyhHrv
Deburring Wheel, Nylon Fiber Buffing Polishing Wheel 6 inch 9P Hardness: https://amzn.to/3XlIzLN
Thrust Needle Roller Bearing with Two Washers 1/2" (for mill spindle nut): https://amzn.to/3CS65bg
Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (1mm10mm/19pcs): https://amzn.to/3HjquIV
Shars DRO for minilathe Zaxis (carriage) position. (You can cut down the 24" capacitive scale it's aluminum.): https://amzn.to/3fjOfFw
Digital tachometer: https://amzn.to/3UePGUg
FLEXBAR Optical Center Punch: https://amzn.to/3WRwpKD
IRWIN Step Drill Bit Set (I highly recommend Irwin brand step drills. They were the originator of this concept in the 1980s and the knockoffs are not nearly as good) : https://amzn.to/3hv4zno
Angel Eye Ring Light (for mini mill): https://amzn.to/3fp5hSy
DC motor speed controller (for mill table feed and minilathe carriage): https://amzn.to/3WOhOjk
Brownell OxphoBlue Professional Grade Cold Blue: https://amzn.to/3TtslyX

Let me know if you see anything else in my video that you'd like to know more about and I'll either add it here in this description or in response to your comment.