MichaelMouse
Member
Registered: 05/17/05
Posts: 8135
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Glaser sells a "name" gouge, which is why his article deals mostly with rough stock removal. I'm hoping you have nothing similar in mind. The gamma alumina form (cubic) is the expensive stuff. Oddly, wheels are marketed as superior for the task because the cubes fracture easily. Which makes smaller mesh grit, if logic is applied rather than advertising. The hexagonal crystal form also fractures and produces sharp edges. I'm not able to determine which fractures more readily.
So I opt for the good glue for wear away rather than the form of the crystal for breakaway resistance. I use 24 grit on the brush hog and the mower, but would never put something that coarse on a grinder. I'm 60/100 in my setup, and the 60, like the 60 grit disks I got with my sanding sets, may well last forever. You want to reshape, use a sander.
My brief fling - brief because they fly away so fast - with the "friable wheels ended after the first pair. Or the first one, I guess, because the 60 is still hanging around for reasons mentioned above.
My choice. The Israeli SiC wheels have been good performers throughout. I do not use a jig, rather merely freshen the existing by laying heel to toe on the existing bevel, so I don't dress the wheel with a stick, but the tools.
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Better to follow the leader than the pack. Less to step in.
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electraglideclassic
Member
Registered: 10/01/08
Posts: 164
Loc: Green Bay, WI
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Karl, did you notice that woodworkers supply has the 8 x 1 x 120grit wheels for 14 bucks? Why that one wheel is 25% the cost of the others, I'm not sure, but ordered a couple anyway. Working in machine shop for 36 years, I just like that type wheel for grinding hardened steel. We were taught to use the green wheels for carbide, but maybe they may work okay on HSS. Never done it, myself.
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Wildwood
Member
Registered: 12/01/05
Posts: 1239
Loc: Jacksonville, NC
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Nice to know information each manufacturer’s wheel will differ.
http://www.cgwheels.com/Media/Doc/cataloges/Grade%20marking.pdf
http://www.georgiagrindingwheel.com/grindingwheels_basics.htm
Click on “Abrasive training pretty good read.
http://pacificgrindingwheel.com/index.php?option=com_content&task=view&id=181&Itemid=151
I like 46 grit wheels for re-shaping or repairing a bevel angle. Like an 80 grit wheels for re-sharpening tools. Believe get more out of a K-Grade hardness wheel than others. Colors, structure or bond pretty much meaningless to me, will vary greatly by manufacturer. Used CGW wheels made in Israel, Georgia, Pacific and Norton wheels all will sharpen your tools so price plus shipping gets my attention.
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Steve K
Honored Veteran
Registered: 02/18/02
Posts: 4385
Loc: Huntington IN
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Thanks for all of the replies, the forums are a great resource!
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Steve K
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robo hippy
Member
Registered: 03/31/06
Posts: 990
Loc: Eugene, OR
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The CBN wheels run so cool that I can sharpen or touch up my bench chisels with them, no problem. They will, by far outlast any comparable $ amount of any other wheel out there. Diamond is for carbide, CBN is for steel. I have an 80 grit CBN wheel that removes steel faster than the 40 grit wheel that came with my Baldor grinder. If you need to do serious reshaping, take it to the local saw shop for them to put on one of their belt sanders, other wise, the 80 grit CBN wheel is fine.
robo hippy
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elderbarryl
Member
Registered: 03/29/07
Posts: 295
Loc: Fort Pierce, Florida
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That $14 price is a misprint, already checked it out. Think the actual price is $49+ in the new catalog according to John when I called. Sorry!
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