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  • #16
    Originally posted by Sberry View Post
    Here is a common one, the hookup here is 3/4 and a bushing and special pin is always needed so I re-cut the hole to 1" so we use our common typical setup. I rarely use a drill bit or even a press on holes larger than 3/4, I clamp things to the bench so I can push or most often doing it in place on the machine such as this one. Super fast, easy and leaves a nice looking hole.
    What do you use as a pilot when enlarging a hole like that? Or do you use a mag drill?
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    • #17
      Sberry,
      yeah, good question for us new guys. If you have an old hole, and no plug to weld it back in, how do you make a bigger hole, since you can't use the pilot bit?
      thanks
      I'm not late...
      I'm just on Hawaiian Time

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      • #18
        Thats one tuff cordless drill
        Scott
        HMW [Heavy Metal welding]

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        • #19
          Originally posted by Bert View Post
          Sberry,
          yeah, good question for us new guys. If you have an old hole, and no plug to weld it back in, how do you make a bigger hole, since you can't use the pilot bit?
          thanks
          Drill a hole in some wood or plate metal and clamp it on the spot where you want to drill the new hole. The wood or plate acts as a guide. I use this method a lot as it makes it easy to eyeball where the edges of the hole will be, you dont have to spend any time making the pilot hole in thick metal and I tend to wear the pilot bits out before I run out of hole saw bits. You can cut larger and 1/2 moons

          Only a welder can "move" a misplaced hole!
          Weekend wannab racer with some welders.

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          • #20
            Vicegrip

            ok, stupid here....won't the vice or clamp be in the way???
            I'm not late...
            I'm just on Hawaiian Time

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            • #21
              Break down and buy a bit!

              http://www.acetoolonline.com/product-p/irw-90188.htm

              You can get a 1-3/8" high speed steel Silver and Deming drill bit for around 30 bucks. Or you could probably borrow one from a machine shop with a few bucks to cover wear. The job will be done in less time than it would have taken to get halfway through the first hole with the wrong tool for the job.

              80% of failures are from 20% of causes
              Never compromise your principles today in the name of furthering them in the future.
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              • #22
                Originally posted by Bert View Post
                ok, stupid here....won't the vice or clamp be in the way???
                I just noticed this image. Check out the image in post #13. He is using a plate with a guide hole. My discription not nearly as clear as a single image.
                Weekend wannab racer with some welders.

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                • #23
                  Originally posted by Bodybagger View Post
                  http://www.acetoolonline.com/product-p/irw-90188.htm

                  You can get a 1-3/8" high speed steel Silver and Deming drill bit for around 30 bucks. Or you could probably borrow one from a machine shop with a few bucks to cover wear. The job will be done in less time than it would have taken to get halfway through the first hole with the wrong tool for the job.
                  why is a hole saw a wrong tool? (Just my opinion and YMMV) I have both types and still use hole saws when doing any large dia metal drilling free hand and sometimes even on clamped stock in the press. Hole saws are the go to when drilling large holes in thin sheet stock or through a stack of thin metal when making something in bulk. For me, when drilling metal, a bit of that size is drill press with worked well clamped only. It will turn your drill (and perhaps a thumb) around the first time it grabs and the break out at the end of the cut is a bear unless you clamp some more stock to the back to drill into. A hole saw takes a lot less HP to make a large dia cut as it is removing a thin ring of materal rather than removing all the materal in the "hole".
                  Weekend wannab racer with some welders.

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                  • #24
                    Vicegrip,
                    thanks, saw the pic. Looks like he just clamped a backing plate over the old hole using metal or wood to guide the hole. Yes, now I feel like....duh!

                    bert
                    I'm not late...
                    I'm just on Hawaiian Time

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                    • #25
                      Hole saw info

                      For what its worth I recently found out that MK Morse makes Ace Hardware brand Bi-metal holesaws. MK Morse brand bandsaw blades have outlasted anything I have tried in the past on my Wellsaw bandsaw. Their products seem to be very durable, pricey, but you get what you pay for these days...

                      Wrench

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