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  1. #1
    Join Date
    Jun 2013
    Location
    Toronto, Ontario
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    Carrier knockouts

    Why only carrier? Knockouts that you aren’t even using end up popping out while you’re trying to punch out the ones you do want.
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  2. #2
    Join Date
    Jan 2001
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    21,439
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    Unibit a starter hole and use snips to cut it out.

    Whats scary is that it looks like an installer tried that.... dont they have enough sense to get out a unibit... or heck.. you could even use a 1/4 inch bit... just something to get the tip of the snips into... and then cut a neat hole.

    And yea... its a shame there is no consistency to those knockouts... and its not just carrier.
    The bible is my constitution and the constitution is my bible.

    WE THE PEOPLE refers to THEM and not YOU.

    Chewbacca Mom 2016

  3. #3
    Join Date
    Aug 2018
    Location
    Piedmont Triad, NC
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    I honestly just laughed out loud when I saw that. I can just hear the cursing and swearing coming from that situation. I’ve had small knockouts piss me off but on large ones like that I bought a 2 1/2 inch hole saw to avoid losing my $&@# trying to beat a hole through that casing.

  4. #4
    Join Date
    Dec 2007
    Posts
    9,404
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    They are HORRIBLE!!!!!!!!!!

    Knockout my a$$.
    The Food Stamp Program, administered by the U.S. Department of Agriculture, is proud to be distributing the greatest amount of free meals and stamps EVER.
    Meanwhile, the National Park Service, administered by the U.S. Department of the Interior, asks us to "Please Do Not Feed the Animals". Their stated reason for this policy "... the animals become dependent on handouts and will not learn to take care of themselves."
    from an excerpt by Paul Jacob in Sun City, AZ

  5. #5
    Join Date
    Jan 2010
    Location
    Sea to Sky
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    The worst one I had was a knockout for a Trane air handler electric heat kit. It was punched so poorly that all it was good for was a line for my sawzall to follow.

    Sent from my SM-G965W using Tapatalk

  6. #6
    Join Date
    Sep 2002
    Location
    Virginia
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    6,786
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    knockouts in disconnects are a pain !!

    Your trying to pull the metal disc , when suddenly the metal ring wants to come too making the hole too big ! Now you have to get reducers

    or the disc comes out leaving that little metal tit

  7. #7
    Join Date
    Nov 2016
    Location
    Ardmore, PA
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    84
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    It is a function of the punches being worn out.

  8. #8
    Join Date
    Jan 2005
    Location
    St. Lucie West, FL.
    Posts
    137
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    I know the feeling. Like said, unibit and tin snips. LOL

  9. #9
    Join Date
    Dec 2002
    Location
    in a house, Appomattox, Va.
    Posts
    4,754
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    Trane used to be so aggressive with punching, all the concentric rings would pop out with little force, then they went to opposite end spectrum, concentrics were just a suggestion embossed into the metal.

    that furnace looks like it may have some blue stains from the sheet metal fighting you.


    last week found a pile of reducer rings for 1/2 to 3/4", like what you need when discos don't break out clean. Asked a coworker if he needed any, yes, yes , please.
    Col 3:23


    questions asked, answers received, ignorance abated

  10. #10
    Join Date
    Mar 2004
    Location
    Austin, Texas
    Posts
    2,145
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    Carrier knockouts - don't.

    That is my experience with Carrier knockouts. I now carry a hole saw to solve this problem. And I make sure to create all the holes I need for the entire installation while the unit is at the truck. Not in the attic or the mechanical room where space is limited.
    If "I have always done it this way" is a good reason to do it again, how many times do I have to do something wrong - before it becomes right?

  11. #11
    Join Date
    Mar 2007
    Location
    Where the grass is green and the girls are pretty
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    I'm sure they suck but why would you bang in the middle and not a edge?

  12. #12
    Join Date
    Sep 2007
    Location
    State College, PA
    Posts
    2,970
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    Quote Originally Posted by Snapperhead View Post
    knockouts in disconnects are a pain !!

    Your trying to pull the metal disc , when suddenly the metal ring wants to come too making the hole too big ! Now you have to get reducers

    or the disc comes out leaving that little metal tit
    When I do 1/2" knockouts, I have the reducers at the ready 'cause I know what to expect.

    But as time go by, I actually seem to be getting better at getting that disk out without further damage.

    It is actually good to hear that you other guys have had similar issues to what I have experienced. I don't feel so dumb now.
    Can someone please explain to me -
    Why is there never enough time to do it right the first time, but plenty of time to do it twice?


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