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Thread: 400,000 revolutions per minute air grinder first use

  1. #1
    Join Date
    Feb 2011
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    939

    Default 400,000 revolutions per minute air grinder first use

    I ordered this dental grinder $25. Plus and assortment of bits are about $.60 each. More are on the way. The gear selector switch on my Polaris was full of water. I pierced two small holes in the lower portion. I blew air and contact cleaner and WD 40 into it. It works fine. I only have one style of carbide bits however I have five types of diamond burs . Here are some pictures of what it does.Edwin Dirnbeck


    Sent from my iPhone using Tapatalk

  2. #2
    Join Date
    Feb 2014
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    That picture of the tap is interesting. Where did you order the grinder from?

  3. #3
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    Jul 2015
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    S.E. MI, Metro Detroit
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    Nice work Edwin, you must have a steady hand as well.

  4. #4
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    Jan 2005
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    Buffalo NY
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    Home Shop Dentistry. Perfect.

    --Doozer
    DZER

  5. #5
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    Jan 2013
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    Michigan
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    Edwin! Can you make and fit a crown?

  6. #6
    Join Date
    Feb 2011
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    939

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    Quote Originally Posted by Yondering View Post
    That picture of the tap is interesting. Where did you order the grinder from?
    Got it from Amazon


    Sent from my iPhone using Tapatalk

  7. #7
    Join Date
    Aug 2009
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    6,664

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    WOW, 400k R's. I wonder what it has for bearings?

    JL.....

  8. #8
    Join Date
    Jan 2002
    Location
    Huntsville Ala
    Posts
    5,908

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    I'd think it'd spin in air bearings.

    (I assume it's being propelled by air.)

  9. #9
    Join Date
    Aug 2004
    Location
    Sunny So Cal
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    5,174

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    Quote Originally Posted by Edwin Dirnbeck View Post
    Got it from Amazon


    Sent from my iPhone using Tapatalk
    I want one. I have some of those inexpensive drills with the colored collars. Will it work with those? I think 1/8" dia. JR
    My old yahoo group. Bridgeport Mill Group

    https://groups.yahoo.com/neo/groups/...port_mill/info

  10. #10
    Join Date
    Nov 2011
    Location
    Salem, Oregon
    Posts
    494

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    Quote Originally Posted by JRouche View Post
    I want one. I have some of those inexpensive drills with the colored collars. Will it work with those? I think 1/8" dia. JR
    It's hard to tell from his photo, but if a 10-32 tap is 0.19", that shank appears to be less than 1/8".

    Dan
    “All political power comes from the barrel of a gun. The communist party must command all the guns, that way, no guns can ever be used to command the party.” (Problems of War and Strategy, Nov 6 1938, published in “Selected Works of Mao Zedong,” 1965)

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