[TheForge] OT -12v motors

[Andrew Vida]

On 6/20/2011 8:22 AM, Grover.Richardson at gtri.gatech.edu wrote:
 > The question is how much HP does a normal 110 V motor have, the one 
used on the buffing wheel that you wish to replicate.  Find a dc motor 
of equivalent horsepower and you will have a pretty much equivalent 
grinder.  The dc motor will have different characteristics under load 
(shunt or series fed (bunches of gobbledegook that is not that important 
to someone who just wants to use it<G>), but overall should provide you 
with a pleasurable tool.
 >

My small buffer, 1800 rpm, is 1/2 hp.  It will hurt you if you do not 
show the proper care, but my 3600 rpm 3/4 hp is monster enough to kill 
you fast and ugly.  You don't need more power for anything of moderate 
size.    Those large spindle, high hp industrial buffers such as the 
ones GE made ages ago have their places, but  only for substantially 
larger work.  I'd call 1/2 hp good for most tasks.  A lower spindle 
speed is definitely desirable from both the safety standpoint as well as 
that of not cutting your surfaces.  3600 rpm motors will allow you to 
cut very deeply into your work far faster than many people would 
initially think possible.  The difference between 1800 and 3600 is 
remarkable.