stansknives
starting to shine!
Member since January 2013
Posts: 29
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Post by stansknives on Jan 27, 2013 12:50:47 GMT -5
Hi all, I am new here and need help on grits for tumbling. I am almost certain that they need to be silicon carbide, right?? Also, a friend GAVE me a 100 pound new bag of grit that is as follows. Mobile Abrasives Black Blast #4 , Blasting Aggregates. Says on bag , contains a low free silica material. Also has warnings about breathing dust from it. My question, is this GIFT worth using in my tumbler? If so, it will save me some cash. If not, can anyone direct me to a good supplier who is reasonable on price? I will be buying at least 25 pounds of grit at a time. Can anyone help?? Stan :help: :help:
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snuffy
Cave Dweller
Member since May 2009
Posts: 4,319
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Post by snuffy on Jan 27, 2013 13:10:58 GMT -5
I'm pretty sure what you got is ao sandblast,we all wish it would work good for tumbling,but it rounds off quickly.Silicon carbide stays sharp as it breaks down.The cheapest grit I found several weeks ago was at Miles Supply.I get it in 50 lb buckets.Kingsley North sometimes has it on sale at a fair price.
snuffy
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,564
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Post by jamesp on Jan 27, 2013 14:41:25 GMT -5
I saw it on Ebay for 1$ per pound.That is the cheapest i have ever seen Sil Car.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,564
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Post by jamesp on Jan 27, 2013 15:24:11 GMT -5
Black blast is coal slag.It is mohs hardness of 6-7.Too soft for tumbling about all materials.
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stansknives
starting to shine!
Member since January 2013
Posts: 29
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Post by stansknives on Jan 27, 2013 16:00:16 GMT -5
Thanks to all who posted. Im sorry my stuff wont work on rock, BUT, I can use it in my smaller tumbler to do antler buttons and such. Thank you ALL very much!!Also SNUFFY, I have been looking at grit from Miles Supply. Stan
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