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Thread: Sharpening Forstner Bits

  1. #1
    Join Date
    Aug 2007
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    Sharpening Forstner Bits

    Wow, What a difference it can make even on a cheapo Grizzly set like mine.

    A while back I picked up a forstner bit sharpening kit like this one

    Click image for larger version. 

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    Someone I know needs to borrow a bit, so I thought I would clean it up and sharpen it. What a difference that made.

    It made shavings like those that come off of a pencil sharpening, and made smooth clean cuts in cherry.

    My only problem now is that my forstner bit kit has so many bits in it...
    Programmer - An organism that turns coffee into software.
    If all your friends are exactly like you, What an un-interesting life it must be.
    "A door is what a dog is perpetually on the wrong side of" Ogden Nash


  2. #2
    Join Date
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    No, not all of SoCal is Los Angeles!
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    I stretched a high carbon set from Woodcraft for years by doing a touch up now and again. I think the set was about $15 and boy, did I get my money's worth. Several folks sell sharpening sets now and all are pretty inexpensive. As your experience shows, a little love can really bring your bits back to like new performance.
    Any sufficiently advanced technology is indistinguishable from magic.
    - Arthur C. Clarke

  3. #3
    Join Date
    Dec 2007
    Location
    Tellico Plains, Tennessee
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    I'm pretty cheap about replacing my bits... I use the large bits for pepper mills, 1 3/4, 1 9/16, 1 1/2 and a couple of others... I have a cheap HF 1" belt sander and when the bit s stop cutting well, a quick touch on the sander works wonders.... you and slip the slot in the bit over the belt and touch the flat side of the bit to sharpen... probably not as well as using the hand tiles, but works for me in a pinch.
    Chuck
    Tellico Plains, TN
    https://www.etsy.com/shop/TellicoTurnings
    My parents taught me to respect my elders, but it's getting harder and harder to find any.
    If you go looking for trouble, it will usually find you.

  4. #4
    Join Date
    Jun 2007
    Location
    Oceanside, So. Calif. 5 mi. to the ocean
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    Quote Originally Posted by glenn bradley View Post
    I stretched a high carbon set from Woodcraft for years by doing a touch up now and again. I think the set was about $15 and boy, did I get my money's worth. Several folks sell sharpening sets now and all are pretty inexpensive. As your experience shows, a little love can really bring your bits back to like new performance.
    Glenn,

    I've got plenty of love. What I need is skill.

    Enjoy,
    JimB
    First of all you have to be smarter than the machine.
    VOTING MEMBER

  5. #5
    Join Date
    Nov 2012
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    Wapakoneta, OH
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    Can't say that I've ever seen a kit like that, where does one get it?

  6. #6
    Join Date
    Aug 2007
    Location
    Reno NV
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    I got mine from peachtree, but there out there

    http://www.amazon.com/s/ref=nb_sb_no...sharpening+kit

    All you probably really need though is just one of those small diamond hone paddles.
    Programmer - An organism that turns coffee into software.
    If all your friends are exactly like you, What an un-interesting life it must be.
    "A door is what a dog is perpetually on the wrong side of" Ogden Nash


  7. #7
    Join Date
    Aug 2008
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    Reno, Nv
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    With as many bits as are floating around the shop...sounds like a good investment.
    Your Respiratory Therapist wears Combat boots

  8. #8
    Join Date
    Mar 2010
    Location
    SW MN
    Posts
    34
    Just sharpened a couple bits yesterday---used some diamond files for the two cutters--- but chucked a chainsaw sharpening stone in my dremel tool. Next used a sharpie to darken the inside of the cutting rim---proceeded to very carefully freshen the inside surface--and this old and much used bit cut like or better then new---FYO--works for me.

  9. #9
    Join Date
    Feb 2012
    Location
    St. Catharines, Ontario, Canada
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    OK, I have two of those diamond paddles, but where do I apply them in order to sharpen a Forstner bit?
    Cheers,
    Roger


    The other member of Mensa, but not the NRA

    Everyone is a self-made person.

    "The thing about quotes on the internet is that you cannot confirm their veracity" -Abraham Lincoln

  10. #10
    Join Date
    Aug 2007
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    Reno NV
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    Wood magazine has a decent little picture based step by step.

    http://www.woodmagazine.com/woodwork...forstner-bits/
    Programmer - An organism that turns coffee into software.
    If all your friends are exactly like you, What an un-interesting life it must be.
    "A door is what a dog is perpetually on the wrong side of" Ogden Nash


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