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2K views 9 replies 7 participants last post by  HillWilly 
#1 · (Edited by Moderator)
All you Craftsman RAS enthusiasts and the rest of you that need planing irons and chisels sharpened. while I was thumbing thru the web the other day I discovered a cup shaped diamond sharpening wheel that had the 1/2" x 20 thread that would attach to the accessory side of my RAS. With the proper jigs and the proper head rotation, it seems like this might be made to work!!!

I don't remember the site at this moment but I did not stray too far into my browser to find it and I will find it again., If any one finds it first please let me know!!!
 
#3 ·
I'd like to see that if you find it again. All the threaded diamond cup wheels I know of are 5/8, not 1/2 so they fit on an angle-grinder.
 
#7 ·
Well,
Diamond cup wheels are really not the right wheel for grinding steels. Yes, they will grind, but removing much material is not economical, with pretty poor results.
The modern correct wheels are CBN "cubic boron nitride", they are very expensive.
Since the wood tools would be finished honed, I would recommend a Norton seeded gel wheel, coarse grit, soft grade. The blue wheels, they grind cool and work good without coolant, not terribly expensive.
Please be very careful with cup wheels, they can explode if bumped or overloaded.
I use all the above wheels on a tool and cutter grinder, diamond only for carbide.
 
#8 ·
Unbob, I am familiar with the cup shapes that you are talking about and their explosive nature. The one I saw had a wide diamond surface perpendicular to the arbor and is used like you were sharpening on the side of an arbor mounted grinding stone. I still haven't found it again!!
 
#9 ·
Here is the Norton site, the photo may show what you are looking for.
The aluminum body wheels are fairly safe, the regular stone ones can be a safety hazard.
If one insists on using diamond on steel, the coarse wheels with low concentration diamond will grind better.
A 1" hole wheel can be bushed to fit the regular 5/8" arbor on the saw.
I haven't done it, but a tool fixture could be made, and the travel of the saw could be used for some pretty accurate grinding, I would think.

http://www.nortonindustrial.com/uploadedFiles/SGindnortonabrasives/Documents/Catalog_PDFs/NortonSuperabrasives-NortonToolroomWheels.pdf
 
#10 · (Edited by Moderator)
I opened the norton site. I scrolled down to page 19. The one I saw on line was like the one in the lower right corner. It was 4 1/2" diameter with the rim width ["w" dimension] about 1 1/2", with an arbor thread of 1/2" x 20. Also one with a 5/8×11. I am still looking. I am not sure what RPM would work. It may have even been a wet lube application, or not.

And as for the grit, I have found that it doesn't take "SCAREY SHARP" to make a good curl.

I remember seeing a drum sander that was run by a pulley from the accessory side of the Craftsman RAS, and with a little inagination and some pulley juggling, I cant help but imagine…........

Also i found a 10" x 2", and 10" x 4" FLAIL type sanders [I am really not sure how else to describe them] with very course grit used for stripping and course shaping in a hurry, and again, I was in a hurry and did not get enough info, but they may have also been adaptable to the above RAS.
 
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