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  1. #21
    Silver Member
    Join Date
    Jun 2011
    Posts
    144
    Location
    central,wi.
    Tractor
    TYM 350

    Default Re: How To Cut Half Inch Steel?

    A 4 1/2" grinder with a .045 disc will do the job. The trick is to score a line acrose then use a back and forth movement. If you try to cut straight thru in one pass the disc gets too much contact area and doesn't cut as well.

  2. #22
    Gold Member
    Join Date
    Nov 2005
    Posts
    484
    Location
    Colebrook, N.H.
    Tractor
    Kubota L3830HST

    Default Re: How To Cut Half Inch Steel?

    Just wanted to report that I got the cutting edge cut down this afternoon. I used an .045" cutoff disk in my 4.5" grinder, and it worked great. I had managed to get a nice straight groove across before the Sawzall blade pooped out, and I just kept making passes back and forth as it went down. As the blade got way down in the cut, it started to get grabby and hard to hold steady. I had the handle screwed onto the right side, I guess because I'm left-handed. I switched the handle to the left side and that made it easy to control, all the way through, untill the end flopped off. Then I switched to a regular grinding wheel and took the sharp edges off. Didn't take long at all. I set it on a couple of sawhorses outside the garage, and with a stiff breeze I didn't need a mask. Used goggles, though. Those sparks are rough on the eyeglasses. I compared the used disk to an unused one, and it had only lost 1/8" of it's diameter. It was a number 27 disk. Still don't know what the difference is between type 1 and type 27. They're both metal cutting blades.
    Thanks again to everybody that responded with suggestions, you guys are great!
    -Jim

  3. #23
    Veteran Member
    Join Date
    Sep 2012
    Posts
    1,205
    Location
    north shore MA.

    Default

    type 1 is just a flat disc.
    type 27 has a depressed center.
    Dan H.

  4. #24
    Platinum Member Reyer Farms's Avatar
    Join Date
    Sep 2012
    Posts
    655
    Location
    Lena, ms
    Tractor
    Mahindra 5010

    Default

    Sorry to be late, a Lennox brand reciprocating saw blade is awesome for your application. I have not used any that cut better or faster. Glad you got it cut.

  5. #25
    Bronze Member
    Join Date
    May 2004
    Posts
    92

    Default Re: How To Cut Half Inch Steel?

    you people have something against a torch? or you like doing things the hard way?

  6. #26
    Platinum Member
    Join Date
    Jan 2011
    Posts
    607
    Location
    Westmoreland County PA
    Tractor
    Fords

    Default Re: How To Cut Half Inch Steel?

    Quote Originally Posted by jimainiac View Post
    \I don't have a cutting torch, and I'd like a smooth cut anyway.
    this is why

  7. #27
    Platinum Member Reyer Farms's Avatar
    Join Date
    Sep 2012
    Posts
    655
    Location
    Lena, ms
    Tractor
    Mahindra 5010

    Default

    Quote Originally Posted by notme View Post
    you people have something against a torch? or you like doing things the hard way?
    The torch happens to be my favorite way to cut steel.

    How To Cut Half Inch Steel?-image-3243928742-jpg

    Not my cleanest cut ever but it gets cut again for elevation. 1"

  8. #28
    Super Member /pine's Avatar
    Join Date
    Mar 2009
    Posts
    5,893

    Default Re: How To Cut Half Inch Steel?

    Even though I have a cutting torch I would have used the same method as the OP...merely because it would be EASIER than running out hoses and bottles and then putting them away again...for such a small task...

    And BTW...not everyone has a torch but most do have electric grinders
    Slash Pine
    blunt and succinct yet sincere...in the immortal words of Popeye..."I yam what I yam"

  9. #29
    Super Member Kyle_in_Tex's Avatar
    Join Date
    Oct 2002
    Posts
    7,983
    Location
    Giddings, Texas
    Tractor
    JD 4310,JD5420

    Default Re: How To Cut Half Inch Steel?

    Hate to say it, but if you have sparks actually hitting your goggles, you are getting plenty of metal dust. Dirty sooty boogers.
    Over-worrying about something is like putting a down payment on trouble.

  10. #30
    Super Member crazyal's Avatar
    Join Date
    Dec 2003
    Posts
    6,414
    Location
    Northern Vermont

    Default Re: How To Cut Half Inch Steel?

    The reason why a torch wasn't used was because the cut would have required a 4 1/2" grinder to smooth it out. If anything it would have taken longer because of how jagged the cut would have been.
    Kubota L4240,Case 580K backhoe, Case 450 Dozer

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