Sharpening Auger Bits

This topic contains 13 replies, has 7 voices, and was last updated by  SeaJay 4 months ago.

Viewing 14 posts - 1 through 14 (of 14 total)
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  • #556433

    SeaJay
    Participant

    I need to sharpen my brace drill’s auger bits. I saw Paul using a common saw file in a video and I was wondering if anyone knows which type specifically, to purchase? I’ve have two files but I want to keep them for the saws I have.

    Thanks all.

    #556440

    Dave Ring
    Participant

    Ideally you would want an “auger bit file”. These are available from Lee Valley, Highland Woodworking, Tools For Working Wood and other online tool vendors–even Home Depot. Prices generally run around $17-$20. You would use a small triangular file to clean up the snail, if necessary, and could probably use one on the spurs and leading edges.

    Dave

    #556445

    SeaJay
    Participant

    Thank you Dave

    Does one file size take care of all drill bits?

    #556480

    Dave Ring
    Participant

    Auger bit files to the best of my knowledge, are only made in one size and are useable on any auger bit that you or I are ever likelyto have to sharpen. Current prices on new ones are crazy high due, I suppose, to limited availability but one should last for many years, unlike the files you use on saws.

    Waitaminit! Lie-Nielsen has them for eight bucks! Get em’while you can!

    https://www.lie-nielsen.com/product/files-auger-bit-file-

    Dave

    • This reply was modified 5 months ago by  Dave Ring.
    #556489

    SeaJay
    Participant

    Ah. Unfortunately, I’m in the UK

    #556490

    Craig
    Participant
    #556491

    Craig
    Participant

    Link no workie.
    Try searching:
    “Auger bit file UK”
    Craig

    SW Pennsylvania

    #556507

    SeaJay
    Participant
    #556601

    pnj2411
    Participant

    Fine-tools has them for Eur 9.90 https://www.fine-tools.com/schlangenbohrerfeile.html

    Manxman living in France

    #556612

    SeaJay
    Participant

    Yes I checked them out before but they charage over 9 euros for delivery so it works out the same price.

    #556660

    Larry Geib
    Participant

    Try using a diamond paddle from ezelap or DMT, if you already have one.

    I started using one when I misplaced my bit file. I’ve found it just as effective. It’s more effective if you slice away a little of the plastic around the edges of the paddle. It makes it easier to file close to the snail. The paddle is thin enough you don’t actually need a safe face to get close to the snail.

    The areas to concentrate on are the top of the cutting edge ( assuming you are drilling down) and just the leading edge of the inside of the spurs up to their apex.

    You also need to file the leading edge of the wing that holds the spur, so you maintain clearance angles for the cutter.

    With two wing cutters, remember the spur cuts the edge of the hole for the cutter 180° behind it.

    The snail cleans up with any small triangular file.

    Don’t file anywhere on the outside of the bit, or on the bottom of the cutter edge.

    Attachments:
    #558461

    Peter Gaffney
    Participant

    I’ve used the diamond paddle files that Paul recommends to great effect. Useable in other sharpening areas so it’s more bang for the buck. Three paddles are around $30 US and are available in the UK from EZE-Lap.

    #574564

    GfB
    Participant

    My son bought be an old Irwin auger bit set (in wooded box) for Christmas. He and I were playing with them last night, and were thinking they’re pretty dull. So this was a good thread to read this morning, and I’ve just purchased a pair of auger files from Lie Nielsen! Thank you.

    #574565

    SeaJay
    Participant

    Update from me, I eventually bit the bullet and bought an auger file from the above posted company in Germany.

    Thanks all for the advice.

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