Results 1 to 13 of 13
  1. #1
    Join Date
    Feb 2006
    Location
    Perth
    Posts
    1,174

    Default Sometimes it pays to remove your ear muffs

    Last night I was doing some cutting/drilling/grinding on some 12 mm plate steel.

    I was drilling a 25 mm hole using a newish MT3 twist drill in a 1HP DP at 160 RPM and, because I had just been grinding, had full face shield and ear muffs on.

    Even though I have been stepping up drill sizes from 12 mm in 2 mm steps, I was being too greedy and the 25 mm bit jammed towards the bottom of the hole. I hit the DP stop button and did not realize that I had not pushed it hard enough to stop it. I grabbed the bit with my left hand and gave it a twist - the bit unjammed it self and started rotating. Luckily the flutes, which are quite sharp, only cut two half cm long divots out of my left palm and ring finger, but it could have been a lot worse.

    If I had removed my ear muffs I would have most likely heard the motor still running. I guess the moral of the story is to really check something has stopped before sticking something into a dangerous place.

    SWMBO was most sympathetic, "f'ing idjiot" was one of the kinder terms of endearment used when she saw some blood on my towel.

  2. #2
    Join Date
    Apr 2011
    Location
    McBride BC Canada
    Posts
    0

    Default

    I wish you a speedy recovery.
    I'd like to add a simple LED (+ current limiting resistor/do I need a diode, too?)
    That sits right beside the mains switch, to show there's power to the motor.
    What's a deaf person supposed to expect?

  3. #3
    Join Date
    Sep 2002
    Location
    Minbun, FNQ, Australia
    Age
    66
    Posts
    1

    Default

    I often do this without turning off, I just make a point of grabbing the chuck rather than the bit.
    Cliff.
    If you find a post of mine that is missing a pic that you'd like to see, let me know & I'll see if I can find a copy.

  4. #4
    Join Date
    Dec 2011
    Location
    Buderim qld
    Posts
    17

    Default

    It is hard to believe that ear muffs that block out most of the sound could be a safety problem. I too have had a similiar problem where the sound of the dust extractor and the ear muffs drowned out the sound of the table saw still running with the tip of the blade spinning at 900 klm an hour. It can be scarey.
    Hope your hand is better soon.

  5. #5
    Join Date
    Aug 2006
    Location
    sunshinecoast
    Age
    60
    Posts
    8

    Default

    When you are protecting your hearing, you are disabling one of your senses, when wearing hearing protection you must pay more attention to visual.



    Regards,


    Frank.

    In trying to learn a little about everything,
    you become masters of nothing.

  6. #6
    Join Date
    Feb 2006
    Location
    Perth
    Posts
    1,174

    Default

    Quote Originally Posted by Kidbee View Post
    It is hard to believe that ear muffs that block out most of the sound could be a safety problem. I too have had a similiar problem where the sound of the dust extractor and the ear muffs drowned out the sound of the table saw still running with the tip of the blade spinning at 900 klm an hour. It can be scarey.
    Hope your hand is better soon.
    Thanks. I moved my DE outside which reduces the noise considerably so that the table saw can easily be heard. I also make it a point to watch the spinning blade until it stops. At least with

    Quote Originally Posted by Cliff Rogers View Post
    I often do this without turning off, I just make a point of grabbing the chuck rather than the bit.
    Sure, but there are no chucks with MT3 bits and the arbor is too small and smooth to get a grip on, compared to a chuck.

  7. #7
    Join Date
    Nov 2007
    Location
    Albury Well Just Outside
    Posts
    2,966

    Default

    It is so easy to get ourselves into trouble. Hope you recover quickly.

  8. #8
    Join Date
    Apr 2011
    Location
    Dandenong, Vic
    Posts
    0

    Default

    Quote Originally Posted by Cliff Rogers View Post
    I often do this without turning off, I just make a point of grabbing the chuck rather than the bit.
    How does this help? unless your just putting it away.
    Its a bit hard to get the next bit in while its going.
    Peter

  9. #9
    Join Date
    Sep 2002
    Location
    Minbun, FNQ, Australia
    Age
    66
    Posts
    1

    Default

    When it jams & stalls the motor, I just grab the chuck & give it a quick twist backwards & it frees up & keeps going.
    Cliff.
    If you find a post of mine that is missing a pic that you'd like to see, let me know & I'll see if I can find a copy.

  10. #10
    Join Date
    Apr 2011
    Location
    Dandenong, Vic
    Posts
    0

    Default

    AH, now I understand.

  11. #11
    Join Date
    Nov 2007
    Location
    Albury Well Just Outside
    Posts
    2,966

    Default

    Quote Originally Posted by Cliff Rogers View Post
    When it jams & stalls the motor, I just grab the chuck & give it a quick twist backwards & it frees up & keeps going.

    To me that is adventurous.

  12. #12
    Join Date
    Aug 2009
    Location
    East Warburton, Vic
    Posts
    457

    Default

    Quote Originally Posted by Christos View Post
    To me that is adventurous.
    You'd be surprised how easy it is to do, I have been doing it for the last 20 yrs or so, in fact once I've unjammed it, I can still hold the chuck, wouldn't try it with a geared drill though, it'd rip ya arm off
    Cheers

    DJ

  13. #13
    Join Date
    Apr 2011
    Location
    McBride BC Canada
    Posts
    0

    Default

    I'm trying to protect what little hearing I have left. Gunshots (7mm/.308 Unlimited handguns/Trap) or explosions (Movie/TV/commercial F/X work), the damage has been done. My 'muffs isolate me from the world. My point is, why NOT have a visual indicator?

Tags for this Thread

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •