Hi All

I'm a newbie with a 7x10 lathe that I'm very slowly outfitting and converting to CNC. I am planning on building a tool post spindle to enable me to easily cut key-ways on shafts in my lathe. This thread has been a fantastic eye-opener.

I have purchased a 200KV outrunner motor with an 8mm shaft. It has a power rating of 2450 watts. IS THIS REAL?? At 50% efficiency this would be over 1 HORSEPOWER for a motor that I could hold in my hand.

Indeed if it is real, it is more powerful than the motor which drives my lathe!!

Puzzled,

Art99

Quote Originally Posted by baccus61 View Post
You can get 10mm straight shaft ER chucks here.
Results for Tool & Work Holding:ER Collet Chucks
Very cheap tools to be had here.
All (3) the electronic brush-less motor driver testers I have used startup in the midband when first plugged in. I have never found a site or a way to control these things where you can have them start at zero volts and then get ramped up from there using a computer.
Mind you, it's been 4 years since I looked so there may be stuff out there that I don't know about. :-)
It would be good if someone had a way of doing this.
There are sites out there that show you how to make your own outrunner motor but the ones I have found are in German or Swedish and Google translator or babelfish don't do a very good job of converting technical lingo.
You could make your own for whatever revs you need for your power supply. That would be nice for a small machine.

If you do make your own spindles for your outrunner motors then you could use the round tool steel blanks from the same site here.
HSS TOOL BIT - ROUND STOCK - LENGTH 100MM (5 PCS) #H28
Lots of different sizes to choose from.
The hardness/brittleness shouldn't be a problem for the power of these small motors.