rykk
spending too much on rocks
Member since September 2011
Posts: 428 
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Post by rykk on Oct 16, 2012 16:29:30 GMT -5
Hi, y'all - I have a 6" high speed grinder/buffer I got at Harbor Freight. It has a disc backer that has a velcro surface on it to hold the various discs or buffer heads. Unfortunately, the sanding discs that came with it are el-cheapo aluminum oxide for metals.
Are silicon carbide discs available anywhere that will work with this grinder/polisher? Or do I have to get some other type of disc backer for them?
Thanks,
Rick
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Post by Dicky the Rockhunter on Oct 16, 2012 18:51:58 GMT -5
that is the tool lots of countertop makers use . Go to a shop and ask .
Dicky
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itsandbits
freely admits to licking rocks
Member since March 2012
Posts: 825
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Post by itsandbits on Oct 16, 2012 18:55:51 GMT -5
do you want to use SC? I use the 5" diamond pads on mine; love them.
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Post by jakesrocks on Oct 16, 2012 18:57:34 GMT -5
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rykk
spending too much on rocks
Member since September 2011
Posts: 428
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Post by rykk on Oct 17, 2012 22:38:49 GMT -5
Thanks, Don - Seem those are all aluminum oxide, though.
Hey, itsandbits - Where do you get the 5" diamond pads? I was thinking of silicon carbide since the discs I've seen are really inexpensive. How pricey are the diamond ones?
Thanks,
Rick
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spicer m
spending too much on rocks
Member since October 2008
Posts: 337
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Post by spicer m on Oct 17, 2012 22:54:45 GMT -5
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itsandbits
freely admits to licking rocks
Member since March 2012
Posts: 825
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Post by itsandbits on Oct 17, 2012 23:13:30 GMT -5
those prices seem half decent; I paid $80 for a 9 pc set here in Canada a few months agoand the guy is only 100k away so he shipped for free, He only had up to 3000grit though plus 2 buff stages. That finishes most sstuff but I'd like to try some higher grits
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Post by jakesrocks on Oct 18, 2012 0:08:14 GMT -5
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jspencer
freely admits to licking rocks
Member since March 2011
Posts: 929
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Post by jspencer on Oct 21, 2012 11:57:20 GMT -5
Automotive body work uses SC sandpaper to do the wet sanding with. I have found 400, 600, 1000, 2000 and 3000 discs in automotive parts stores. Or go to a Sherwin Williams or any other paint store and ask there. Sheets of it is found in some grits at Home Depot. I think they only had 400 and 600. The higher grits I found at auto place.
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jamesp
Cave Dweller 
Member since October 2012
Posts: 36,602
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Post by jamesp on Oct 28, 2012 22:22:50 GMT -5
Mcgill's warehouse has em in diamond.I have 3 cheapo bench grinders with 4 inch plates i attached and then glued 4 inch diamond pads normally used on velcro rig.100,200,400,800,1600 and 3000 grits.RPM is 3600,perfect for velcro backs.I polish slabs,geodes whatever on this rig.Runs very wet as they are sprayed w/water(3600 rpm).Small slabs are done in a few minutes.Also look at Grandquartz,the counter top supply company.
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