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  1. #1
    Join Date
    Apr 2012
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    Healesville
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    Default Diamond cup wheel

    Hi, I would like to make the shaft for this grinding wheel before it arrives, can anyone with experience with these please tell me the
    diameter and length of the bore?
    The description says 20mm for the dia but I would like to know what it accurately is.......

    https://www.ebay.com.au/itm/Diamond-...72.m2749.l2649

    thanks, shed

  2. #2
    Join Date
    May 2011
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    Murray Bridge S Aust.
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    Default

    Sorry I can't help you as to the size, but will this be mounted permanently on a machine, or removed from time to time? Asking as normally they are mounted on a boss.
    If it's going on a boss, the whole thing could be premade, and just the final trimming of the outer shaft skimmed to suit.
    Kryn
    To grow old is mandatory, growing up is optional.

  3. #3
    BobL is offline Member: Blue and white apron brigade
    Join Date
    Feb 2006
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    Perth
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    7,182

    Default

    Quote Originally Posted by shedhappens View Post
    Hi, I would like to make the shaft for this grinding wheel before it arrives, can anyone with experience with these please tell me the
    diameter and length of the bore?
    The description says 20mm for the dia but I would like to know what it accurately is.......

    https://www.ebay.com.au/itm/Diamond-...72.m2749.l2649

    thanks, shed
    I wouldn't rely on this to get an accurate diameter. What someone else got will not necessarily be what you get
    Maybe rough it out but wait till your arrives?

    BTW what grit did you order?

  4. #4
    Join Date
    Apr 2012
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    Healesville
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    Default

    Thanks guys, understand that a measurement with ruler or vernier is not what I am after, but anyone that can take a measurement with an internal mic that has been zeroed with a standard should be close enough.

    Bob, 120 grit

  5. #5
    Join Date
    Dec 2007
    Location
    Adelaide
    Posts
    574

    Default

    The one I ordered a while back it was in fact 20mm.

  6. #6
    Join Date
    Sep 2012
    Location
    York, North Yorkshire UK
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    6,439

    Default

    Hi Guys,

    All the ones that I've bought have been exactly 20 mm bore.

    I've a piece of precision ground bar that is 20 mm diameter and its been a tight push fit in them all.
    Best Regards:
    Baron J.

  7. #7
    Join Date
    Apr 2015
    Location
    Tungkillo, South Australia
    Age
    87
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    74

    Default

    I have 3 for my D-Bit grinder and another one on its way from your ebay URL. Mine are slightly loose on a Stainless round bar that measures 20.00 mm.

    Charles

  8. #8
    Join Date
    Apr 2012
    Location
    Healesville
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    Default

    Thanks fella's, that gives me enough info for the shaft dia..
    What is the depth of the hole (the thickness of the flange)?
    Thanks

  9. #9
    Join Date
    Sep 2012
    Location
    York, North Yorkshire UK
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    6,439

    Default

    Hi John, Guys,

    Quote Originally Posted by shedhappens View Post
    Thanks fella's, that gives me enough info for the shaft dia..
    What is the depth of the hole (the thickness of the flange)?
    Thanks
    Mine vary, 6 mm to 10 mm. The cup wheel is thickest.
    Best Regards:
    Baron J.

  10. #10
    Join Date
    Apr 2015
    Location
    Tungkillo, South Australia
    Age
    87
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    74

    Default

    I ordered one of the 80 grit wheels and it arrived in 10 days. The wheel looks quite impressive, I'm not sure what metal is used for the actual wheel but is gold colour plated and weighs .527Kg. The grit is plated directly to the metal at the rim. A Mitsubishi caliper measures the hole 20.00 mm, the thickness at the hole 12.5 mm and the OD 100.5 mm. HTH.
    I won't be trying it for a while so I won't find if the plated 80 grit diamonds have a reasonable life. Cost was AU$29.89 with free postage. In my case, it is nicely (laser?) etched '80'.

    Charles

  11. #11
    Join Date
    Nov 2016
    Location
    Gulfview Heights, Adelaide
    Posts
    83

    Default

    I was thinking about getting one of these diamond wheels to sharpen carbide router bits on my tool and cutter grinder.
    What grit would be suitable for this?

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