shermlock
has rocks in the head
Member since August 2011
Posts: 612
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Post by shermlock on Jul 23, 2012 21:26:25 GMT -5
Is there any way to tell grit sizes? I bought a collection and in it there were multiple 5 lb bags of grit but nothing was identified. I can tell the course stuff and maybe the 220 but after that it gets considerably tougher for me..
Thanks, Scott
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Steve
has rocks in the head
Member since June 2005
Posts: 506
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Post by Steve on Jul 25, 2012 1:31:56 GMT -5
Just use it for tumbling. I think it will be too difficult to tell if it is a mixed or graded grit.
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rxscram
spending too much on rocks
Member since August 2011
Posts: 484
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Post by rxscram on Jul 25, 2012 10:02:14 GMT -5
I think he was asking how to differentiate between the finer grits... he can do 60/90 (assuming that's what he has) and 220, but can't tell what the smaller stuff is... 500, 1000, etc.
Is this right, Scott?
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Steve
has rocks in the head
Member since June 2005
Posts: 506
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Post by Steve on Jul 25, 2012 11:18:27 GMT -5
Yes, but I suspect that he will not be able to tell if it is 220 or 120/220 or to differentiate between 500 and 600 or between 1000 or 1200 or tell if someone mixed 500 and 600 together or some other such thing. My suggestion is to use the grit for applications where the specific size is not as mission critical. I once ended up with a collection of such bags of grit. After trying to do comparisons with my own stock I realized that I would never trust this grit for lapping and just threw it in the tumbler.
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shermlock
has rocks in the head
Member since August 2011
Posts: 612
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Post by shermlock on Jul 25, 2012 18:44:20 GMT -5
I think he was asking how to differentiate between the finer grits... he can do 60/90 (assuming that's what he has) and 220, but can't tell what the smaller stuff is... 500, 1000, etc. Is this right, Scott? That is right. I am using it just for tumbling but I just can't tell once I cross the 500 stage...They appear to be universal in sizes but I can't really tell. I've used my loupe to get through 500 but even with the loupe I can't see what grade is bigger after 500. Thanks for the replies, Scott
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Post by paulshiroma on Jul 25, 2012 19:55:51 GMT -5
Scott, do you have any lapidary or gem and mineral shops nearby? Or maybe an industrial company that could help? Maybe someone from one of those types of stores could help ID the stuff.
Paul
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