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Thread: Use an impact to remove angle grinder nuts

  1. #1
    Supporting Member projectswithrich's Avatar
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    Use an impact to remove angle grinder nuts

    This impact spanner makes changing cutting wheels and grindings much quicker.

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  2. The Following 13 Users Say Thank You to projectswithrich For This Useful Post:

    Andyt (Sep 21, 2021), Home-PC (Sep 22, 2021), johncg (Sep 26, 2021), Jon (Sep 22, 2021), kboy0076 (Sep 28, 2021), lassab999 (Sep 21, 2021), Moby Duck (Sep 28, 2021), nova_robotics (Sep 24, 2021), paulzephyr (Sep 20, 2021), schuylergrace (Sep 20, 2021), Slim-123 (Sep 20, 2021), terence b (Sep 21, 2021), Tule (Sep 21, 2021)

  3. #2
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    Thanks projectswithrich! We've added your Angle Grinder Key to our Miscellaneous category,
    as well as to your builder page: projectswithrich's Homemade Tools. Your receipt:




  4. #3
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    For un-doing yes but the nut does not need to be cranked down hard for installation.

  5. #4
    Supporting Member projectswithrich's Avatar
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    Correct, snug is fine. Plus it will be difficult to get off if you really cinch it down. This isn't a very strong impact so it works great for quick disc changes.
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    Really good idea. I wonder how well the nails will hold up over time; nail steel is pretty soft; it seems they'd bend after several uses.

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    For a cheap and easy tool this is just brilliant. Strange how the easy stuff is the hardest to think up.

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    Thanks, but no thanks, it could be OK for some people. Personally I could change a lot of disks in the time it would take to get the impact, an air hose and the special tool out.
    FWIW, for convenience, I have several grinders w/different disks on them.

  9. #8
    Supporting Member projectswithrich's Avatar
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    It definitely could be an issue over time depending on how tight the nuts get after use. Mine usually don't get much tighter than the initial torque so I haven't had an issue so far. This version was the proof of concept and I do agree that the only weak point would be the pins so on future variations it would be a good idea to go with hardened pins. Mcmaster has some 5/32 dowel pins with a 4100lb breaking strength. P/N: 98381A490 Those could be a permanent solution. If anyone has any other idea feel free to post.
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  10. #9
    Jon
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    Congratulations projectswithrich - your Angle Grinder Key is the Homemade Tool of the Week!

    Clever little tool, and yes, adding a magnet is a reasonable next iteration.

    Some more good builds from this week:

    Slab Flattening Jig by Dragonhand
    Vise by orioncons36
    Trailer Neck Rebuild by Frank S
    Parting Tool Bit Holder by uv8452
    Trigger Clamp Modification by projectswithrich
    Portable Hydraulic Power Pack by warsztatOdZera
    Thread Milling Insert by bbutcher85
    Tap and Die Holder by uv8452
    Wall Chaser by fox craft
    Parallel Guide and Circle Jig by Didpoolhall
    CNC Guide by fergiomaria
    Battery Health Tester by rgsparber
    Sticker Alignment Tool by rgsparber
    Pin Spanner by Frank S
    Folding Trailer by fawabros

    projectswithrich - we've added your tool entry to our All Homemade Tool of the Week winners post. And, you'll now notice the wrench-on-pedestal award in the awards showcase in your postbit, visible beneath your username:



    You've also been granted free lifetime Supporting Member status. I've stopped your paid recurring subscription, so you won't have to pay for membership again.

    And, you'll be receiving a $25 online gift card, in your choice of Amazon (US-only), PayPal, or bitcoin. Please PM me your current email address and award choice and I'll get it sent over right away.

    Nice work!

  11. #10
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    Although the range of diameters is restricted, and I'm not sure how they weld, Concrete Nails might be a cheap source of hardened pins.
    You could also weld the original grinder spanner to the end of the socket and cut off the handle.
    Rare earth magnets shatter easily and may not handle the indirect impacts.
    Conventional iron magnets lose their magnetism with repeated impacts.
    You could try magnetising the whole socket as you have made it. To be redone if the magnitism fades.
    I have some concerns about the damage the impacts may be doing to the plastic gearbox, which is being rattled backwards during this process.
    Last edited by Moby Duck; Sep 28, 2021 at 05:15 PM.

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