Almost all Harbor freight grinders run at 3450 rpm. They do have a
couple that turn slower but have a horizontal wheel for sharpening
chisels. Also most of the smaller 6" wheel dia grinders you buy are
made overseas to the US. As with most items today they are no longer
made in the USA. I don't care what source you buy from If the
grinder is under $125.00 dollars it is made over there.
A local supplier to the jewelry trade resells a lot of Harbor
Freights jewelry, metal smith tools. As they have compared them to
the items supplied to them from their suppliers and found that they
are from the same country and probably the same factory.
A national auto parts chain sold the same type grinders, labeled
assembled in the USA. All the parts are made in China, they put the
wheels on here and put them back in the box.
A friend's wife just got an large order for grinding wheels from
China. They are in Canada, but the grinding wheels she distributes
are made in the USA. The Chinese are having trouble getting all the
bits and pieces to make up the products they are selling to all
If you are running a buffer or any piece of motorized equipment,
6,8,10 hours day. 5 or 6 days a week you should be using an
industrial grade equipment.
Cutting the shafts off the motor is not a good idea. You can
unbalance the shaft and case early failure. Also cutting a spinning
shaft is asking for the possibility Of broken fingers, hands, wrists
ect. Not including the wounds from flying blade pieces.
The tapered spindle adapters I have fit nicely on the shafts and
only add about 2 " to the total buffer width.
And yes if you are shop wise enough to convert them double spindles
motors from washer/dryers are great and with reasonable
cleaning/lubing will last for ever.
So If you have another industrial supply house in your area. They
probably have a low cost 6" inch grinder you can convert. If they
have a web site read the spec's for RPM ect.
here are some others
Again, all the usual disclaimers and legalize apply. I don't work
for or own harbor Freight. P.S. they are a privately held company
and all the stores, are owned by the family that started it.
glen, been there done that, and didn't hurt myself