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  1. #1
    Join Date
    Nov 2006
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    Heidelberg, Victoria
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    Default Designing a drill sharpener

    I apologize if this topic has come up a million times, firstly, has anyone come up with a simple drill sharpener? It's something I'd like to have a go at.

    Question, when sharpening a drill bit, is the bit rotated and pushed in whilst rotating at the same angle to get relief, or is the bit rotated and the tail end dropped during rotation.

    Would either of these actions get the same result?

    I just can't get my head around it at the moment.

    Gentlemen, your comments please.

    Ken

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  3. #2
    Join Date
    Oct 2011
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    Adelaide
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    Default

    Personally when off hand sharpening I rotate the bit while pushing the shank end away from me.
    In a recent thread that touched on drill sharpening I posted this which may be of interest -
    Shop Made Drill Sharpening Jigs

    Michael

  4. #3
    Join Date
    Mar 2013
    Location
    Jervis Bay South Coast NSW
    Posts
    354

    Default

    What about this. Its a jig to use with a grinder https://www.youtube.com/watch?v=72sy...e_gdata_player

  5. #4
    Join Date
    Apr 2001
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    Perth
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    Default

    Try this ...

    https://www.youtube.com/watch?v=-n1RccAzxLg&app=desktop

    It seems a good one to me. (I have a Drill Doctor, so have not pursued it).

    Regards from Perth

    Derek
    Visit www.inthewoodshop.com for tutorials on constructing handtools, handtool reviews, and my trials and tribulations with furniture builds.

  6. #5
    Join Date
    May 2011
    Location
    Murray Bridge SA
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    3,339

    Default

    For the smaller bits I bought a Drill Doctor, tried bench grinder type attachments, still no good, Drill Doctor absolutely fantastic, like new bits.
    To be honest I wouldn't waste my time trying to come up with something better, unless big bucks was spent on a tool and cutter grinder.
    I'm about to start making a Bonelle T&C grinder, for my milling cutters and router bits.
    Kryn

  7. #6
    Join Date
    Sep 2012
    Location
    Yorkshire UK
    Posts
    733

    Default

    Quote Originally Posted by neksmerj View Post
    I apologize if this topic has come up a million times, firstly, has anyone come up with a simple drill sharpener? It's something I'd like to have a go at.

    Question, when sharpening a drill bit, is the bit rotated and pushed in whilst rotating at the same angle to get relief, or is the bit rotated and the tail end dropped during rotation.

    Would either of these actions get the same result?

    I just can't get my head around it at the moment.

    Gentlemen, your comments please.

    Ken
    Hello Ken,

    Maybe this will help provide some inspiration. It's something that I downloaded from somewhere, so I've no other information beyond this picture.

    Drill Sharpening Jig.jpg
    Best Regards:
    BaronJ.

  8. #7
    Join Date
    Jan 2011
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    Far West Wimmera
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    63
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    2,765

    Default

    Have a look at this recent thread. There is some useful information in there.

    https://www.woodworkforums.com/185884...-instructions/

    In case anyone is interested, I am still waiting for that email from Model Engine Maker. I guess I didn't pass muster. lol

    Dean

  9. #8
    Join Date
    Sep 2012
    Location
    Yorkshire UK
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    Default

    Quote Originally Posted by Oldneweng View Post
    Have a look at this recent thread. There is some useful information in there.

    https://www.woodworkforums.com/185884...-instructions/

    In case anyone is interested, I am still waiting for that email from Model Engine Maker. I guess I didn't pass muster. lol

    Dean
    Hi Dean,

    Don't know if this will help.
    Problems registering? for help Please e-mail
    [email protected]


    Best Regards:
    BaronJ.

  10. #9
    Join Date
    Jan 2011
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    Far West Wimmera
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    Default

    Quote Originally Posted by BaronJ View Post
    Hi Dean,

    Don't know if this will help.
    Problems registering? for help Please e-mail
    [email protected]


    Thanks Baron, but I don't think it is worth following up at this stage. I don't believe that there is anything to gain in regards to my study of the drill sharpening jig improvements, and I don't have the time to add more to my plate at this time. I would like to make model engines one day.

    Dean

  11. #10
    Join Date
    Sep 2012
    Location
    Yorkshire UK
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    Default

    Hi Dean,

    I completely understand ! I'm trying to get around to making to making an engine as well.
    Best Regards:
    BaronJ.

  12. #11
    Join Date
    Jan 2004
    Location
    Mackay Qld
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    3,466

    Default

    Quote Originally Posted by neksmerj View Post
    Question, when sharpening a drill bit, is the bit rotated and pushed in whilst rotating at the same angle to get relief, or is the bit rotated and the tail end dropped during rotation.
    Ken,
    When I am sharpening by hand all of the following happen together

    The drill bit is pushed in - very minimally-the cutting edge is cut first and rotates upward.

    The drill bit is rotated - I have never measured it but would say less than 1/4" of a turn

    The shank (tail) is dropped at the about the same rate as the rotation.

    The difference to a jig is that the cutting occurs on the front face of the wheel.

    My wheels are Alum oxide - 40# for roughing and 80# for finish.

    Hope it helps

    Grahame

  13. #12
    Join Date
    Aug 2008
    Location
    near Rockhampton
    Posts
    4,304

    Default

    I have a printed copy of the the plans for Ian Bradley twist drill grinding jig...

    It is on a massive piece of paper about 1200mm X 1200mm

    Twist Drill Grinding Jig WE19 - Workshop Equipment - Plans - Model Engineering - My Hobby Store
    Light red, the colour of choice for the discerning man.

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