Thread: Buffer /Grinder question...

Well gents heres another nube question for all the vets...First , Am I correct in assuming that a buffer and a grinder are the same but with different wheels attached to serve an individual purpose?
Second, as I look for variable speed buffers I see nothing but buffers at or above 3450 rpm. The one Im looking at is a Delta variable speed Amazon.com: DELTA GR275 6-Inch Variable Speed Grinder with Tool-Less Change: Home Improvement
its lowest rpm is 2000.
In all the threads I have read on buffers , a lower rpm (1700-1750) is recommended for cleaning up razors. I have yet to come across one in my search. Can any of you shaed some light?
Thans in advance
-Ben

Yes, they are both electric motors with different attachments. Some "buffers" have longer stems coming out of the motor that gives you more clearance between the wheel & motor. Keep on searching and I'm sure you will find one in the lower rpm range...I think Sears has one of the variable grinders. Baldor, IIRC, is one of the major players in the buffer market. You could go to the "bay" and type in Baldor buffer & you will get a few hits. Caswell plating also offers some IIRC. Slower is better....

yeah, I checked with the sears one first thats 2000rpm at its lowest as well. Im going to look into the others now . Thanks

Harbor freight usually has some variable speed grinders/buffers for fairly cheap. Also good to remember that your RPM depends on wheel size as well as how fast the motor spins.

Originally Posted by Theseus

Harbor freight usually has some variable speed grinders/buffers for fairly cheap. Also good to remember that your RPM depends on wheel size as well as how fast the motor spins.

Am I correct in assuming that if I put 8 inch wheels on a 6 inch buffer it will reduce the rpm's a bit?

Originally Posted by Omega1975

Am I correct in assuming that if I put 8 inch wheels on a 6 inch buffer it will reduce the rpm's a bit?

Yep, it should. By how much, I don't know. Math was never one of my strong points.

Thanks . I cant find anything with lower rpm's even at HF.

1/4 x diameter of wheel x rpm = sfm

Smaller wheel = slower

Horn

Originally Posted by hornm

1/4 x diameter of wheel x rpm = sfm

Smaller wheel = slower

Horn

Im lost , whats SFM?

Originally Posted by hornm

1/4 x diameter of wheel x rpm = sfmSmaller wheel = slowerHorn

Soon after I made my post I had a feeling I was wrong. Glad someone corrected me.