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What type of abrasive papers should a machinist have on hand

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  • MattiJ
    replied
    Originally posted by softtail View Post
    Is any cloth backed roll technically Emery?
    Not sure what you mean, like is all of the cloth backed rolls called emery cloth? or is there any makers left that still actually use emery?

    Emery is a type of mineral (non-pure aluminium oxide) mostly mined from island of Naxos (in Greek) and Turkey but nowadays most? of the "abrasive cloths" use one of the man-made abrasives like aluminium oxide or silicon carbide.
    AFAIK emery cloth is sort of colloquial name for almost any sort of coarse-ish abrasive cloth.

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  • wtrueman
    replied
    How was the cost? How would I get this packet. If in Canada, I am not confident about using Amazon. Out here in radio land, what are your comments about this? Thanks for any help, Wayne.

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  • softtail
    replied
    Is any cloth backed roll technically Emery?

    Leave a comment:


  • rolland
    replied
    I use really rough, rough, kinda rough, smoother, smooth, really smooth and really really smooth. Sorry I could not resist.

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  • RichR
    replied
    Originally posted by danlb View Post
    Thanks for that. As I looked at the chart, I realized that most of them are very close together, and that it won't matter if I pick the P80 instead of the 80. 5 microns difference is not likely to be noticed for a hack like me. If I can't find 80 I'm just as likely to attack it with 100 or 60.
    True, but if you're at the other end of the scale trying for a finer finish, moving from an 800 to a P1000 will set you back. P1000 ~= CAMI 500.

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  • danlb
    replied
    Originally posted by RichR View Post
    You don't list which country you are in, but since MattiJ is from Europe, I suspect the grits he referred to are P80 to P3000 using the FEPA P scale. If
    you are in the US, you might be accustomed to the CAMI scale. A P400 grit is not the same as a 400 grit. Here's a chart that compares the scales:
    http://www.fingerlakeswoodturners.co...Comparison.pdf
    Thanks for that. As I looked at the chart, I realized that most of them are very close together, and that it won't matter if I pick the P80 instead of the 80. 5 microns difference is not likely to be noticed for a hack like me. If I can't find 80 I'm just as likely to attack it with 100 or 60.

    Leave a comment:


  • Magicniner
    replied
    Originally posted by goose View Post
    Emory cloth is nasty.
    I have some old Emery Cloth but since the invention of Aluminium Oxide crystal manufacturing methods the mining industry, primarily on Naxos in Greece, for Corrundum has collapsed and Emery Cloth, even if that name is uses, is not the product it was until the mid 1980s

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  • cameron
    replied
    Originally posted by RichR View Post
    You don't list which country you are in, but since MattiJ is from Europe, I suspect the grits he referred to are P80 to P3000 using the FEPA P scale. If
    you are in the US, you might be accustomed to the CAMI scale. A P400 grit is not the same as a 400 grit. Here's a chart that compares the scales:
    http://www.fingerlakeswoodturners.co...Comparison.pdf
    The CAMI scale seems to have pretty much disappeared here and I expect it's the same in the US. A sleeve of 3M wetordry , for instance, is labeled 400, and only the back of the paper shows it's P400.

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  • RichR
    replied
    Originally posted by dian View Post
    on a side note there is fepa p for sandpaper and fepa f for grinding wheels.
    True, and there are many more grit scales around. Here is a Google spreadsheet that maps 17 different grit scales for your viewing pleasure:
    https://docs.google.com/spreadsheets...R-o/edit#gid=0
    The link for that was found here:
    https://www.bladeforums.com/threads/...-chart.856708/

    Leave a comment:


  • dian
    replied
    Originally posted by RichR View Post
    You don't list which country you are in, but since MattiJ is from Europe, I suspect the grits he referred to are P80 to P3000 using the FEPA P scale. If
    you are in the US, you might be accustomed to the CAMI scale. A P400 grit is not the same as a 400 grit. Here's a chart that compares the scales:
    http://www.fingerlakeswoodturners.co...Comparison.pdf
    on a side note there is fepa p for sandpaper and fepa f for grinding wheels.

    Leave a comment:


  • 3 Phase Lightbulb
    Guest replied
    Originally posted by goose View Post
    Emory cloth is nasty.
    Yes, don't put it in your mouth.

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  • goose
    replied
    Emory cloth is nasty.

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  • 3 Phase Lightbulb
    Guest replied
    I just realized I probably don't have anything finer than 220. I grabbed several of these assortments on the big A:

    https://www.amazon.com/gp/product/B01LZ6TG05

    120/220/320/400/600/800/1000/1200/1500/2000/2500/3000

    Leave a comment:


  • RichR
    replied
    Originally posted by tackit View Post
    Thanks for commenting MattiJ, I have a range now.
    You don't list which country you are in, but since MattiJ is from Europe, I suspect the grits he referred to are P80 to P3000 using the FEPA P scale. If
    you are in the US, you might be accustomed to the CAMI scale. A P400 grit is not the same as a 400 grit. Here's a chart that compares the scales:
    http://www.fingerlakeswoodturners.co...Comparison.pdf

    Leave a comment:


  • tackit
    replied
    Originally posted by MattiJ View Post
    I keep stock of wet-or-dry papers in 80 to 3000 grit and some flexible cloth backed aluminium oxide cloth in 120-320 grits.

    Never seen crocus cloth/paper around here and the dry paper is not that much cheaper compared to wetordry that I would bother to ever use it.
    Thanks for commenting MattiJ, I have a range now.

    Leave a comment:

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