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  1. 10th May 2020, 07:13 PM #1
    pedrogb
    pedrogb is offline Senior Member
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    Default Sharpen an Irwin speedbor Auger drill bit?

    Hi all
    Has anyone any experience in sharpening these bits
    Irwin 16mm Speedbor Auger Drill Bit | Bunnings Warehouse
    Just asking, have been drilling out some mortises in Ironbark, I only have one, it seems ok, but it might need a touch up.
    I had a look online but can't see any videos.
    I have a couple of mortises to go, might have a look tonight (keep the red wine monster away) and see if it something achievable.
    Pedro
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  3. 10th May 2020, 07:59 PM #2
    riverbuilder
    riverbuilder is offline GOLD MEMBER
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    Default

    I sharpened a few for my electrician mate, just used the little ozito electric chain saw chain sharpener, nothing special just made a little plywood jig to hold them, worked well. Don’t damage the drawing point or the bit won’t be much good.
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  4. 10th May 2020, 08:03 PM #3
    pedrogb
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    I just had a go with a little half round file that fits perfectly into the cutting slot. It seems pretty good. I think it will get me through. Thanks for the response.
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  5. 10th May 2020, 08:18 PM #4
    Beardy
    Beardy is offline GOLD MEMBER
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    Default

    As an aside
    I recently make a number of trusses out of F27 KD blackbutt and had to drill a couple of hundred 16mm holes 45 deep and the speedbors actually performed better in the hardwood than the auger bits
    I experimented with various brands and types and the P&N speedbors were the most efficient
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  6. 10th May 2020, 10:09 PM #5
    pedrogb
    pedrogb is offline Senior Member
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    I'll look for them. The irwin one is surprisingly good as well
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