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  #1  
Old 09-27-2021, 09:37 PM
GeneralT001 GeneralT001 is offline
 
Join Date: Sep 2021
Location: NANAIMO
Posts: 43
Default Bench Grinder....6" Enough?

Hi,

Will any 6" bench grinder work for this project or is 8" a better fit?

I was thinking of this grinder:

https://www.lowes.ca/product/bench-g...xb515bg-811071

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  #2  
Old 09-27-2021, 10:14 PM
Taltruda Taltruda is offline
 
Join Date: Oct 2017
Location: Las Vegas, NV
Posts: 877
Default

That will work fine, but I prefer a bench top polishing motor. Harbor freight has one and it has longer shafts that seem better for the 3m wheels.
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  #3  
Old 09-27-2021, 10:24 PM
skelrad skelrad is offline
 
Join Date: Mar 2005
Location: Redmond, WA
Posts: 212
Default

I have an 8” grinder, but that’s just because I use it for other things. The 6” will work fine. The issue I had with my 8” was that the motor housing is nearly as big as a 6” scotch brite wheel (hard to fine 8” scotch brite wheels that have an arbor hole the appropriate size), which doesn’t leave much room for maneuvering parts while deburring. To deal with that I put on an arbor extension that kicks the wheel out a few more inches and gives a lot more room. If I were just buying a new unit purely for scotch brite use, I’d probably go with a buffer because of the long arbors they tend to have.
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  #4  
Old 09-27-2021, 10:44 PM
GeneralT001 GeneralT001 is offline
 
Join Date: Sep 2021
Location: NANAIMO
Posts: 43
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Quote:
Originally Posted by Taltruda View Post
That will work fine, but I prefer a bench top polishing motor. Harbor freight has one and it has longer shafts that seem better for the 3m wheels.
Thanks I'll have a look.
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  #5  
Old 09-28-2021, 06:44 AM
mturnerb mturnerb is offline
 
Join Date: Apr 2015
Location: Ponte Vedra, FL
Posts: 1,601
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I used this one:

https://www.harborfreight.com/power-...fer-61557.html

On this stand:

https://www.harborfreight.com/univer...tand-3184.html

Holes didn't match up but easy to drill some that do and use a couple of bolts to mount.

The longer spindles on the buffer with completely exposed wheels makes it remarkably easier to maneuver parts to work on them.
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RV-14A built/sold N14VB
RV-12iS in progress as of October 2020

Last edited by mturnerb : 09-28-2021 at 07:33 AM.
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  #6  
Old 09-28-2021, 07:50 AM
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vfrazier vfrazier is offline
 
Join Date: Jan 2007
Location: Mount Vernon, IN
Posts: 1,392
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+1 for the longer shafts.

The 6" wheels are fine.
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  #7  
Old 09-28-2021, 08:37 AM
DHeal DHeal is offline
 
Join Date: Sep 2006
Location: Windsor, California
Posts: 1,002
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Longer shafts are good. I found that having an electric motor with a diameter less than the wheels' diameter was very useful in working with long, straight pieces of aluminum -- this also helps to keep the wheels' wearing surfaces square.
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  #8  
Old 09-28-2021, 08:55 AM
JDA_BTR JDA_BTR is offline
 
Join Date: Dec 2013
Location: Colorado Springs, CO
Posts: 1,359
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The HF one will go about three years (or half a project) and then it will start going super wobbly and shake everything to death. I've seen 5 of them go this way. It might be worth a few extra dollars to get a delta or better if you are in it for the long run. Otherwise plan to buy a second one at some point (or bolt it securely to the floor not a bench when the bearings loosen up).
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  #9  
Old 09-28-2021, 12:14 PM
David Paule David Paule is offline
 
Join Date: Dec 2009
Location: Boulder, CO
Posts: 5,004
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Personally, I haven't found any need for a bench grinder. I'm building a standard-build RV-3B, which is a more primitive kit than the later ones, so if ever one were necessary, it would be here. I'm fitting the tail now so I'm fairly far along.

Don't have one, don't need one.

Dave
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  #10  
Old 09-28-2021, 05:38 PM
abwaldal@gmail.com abwaldal@gmail.com is offline
 
Join Date: Jan 2017
Location: Battle Ground WA
Posts: 301
Default Need One??

Ah shucks and here I am thinking one isn't enough. I have three in my hangar. one with real grinding wheels on it, one with a new scotch bright and a grinding wheel, and the other has a quite worn scotch bright wheel
I just guess I'm spoiled.
Can't have enough tools. OH ya I have that upright 2" belt sander gizmo also. Use it a lot.
Art
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