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  • Cutoff Wheels

    Rocky D,

    Thanks!

    It's like I've discovered a new tool!

    I have numerous ways to cut things and have been using angle grinders for many years to grind and wire brush, but you can't really do a very good job of "cutting" with 3/16" or 1/4" abrasive wheels.

    Your post on 10-04-02 got me to thinking. For certain things the thin disks really work and FAST!

    Thanks.

    Dave
    "Some days you're the dog, some days you're the fire hydrant"

  • #2
    I use mine more than my torch, now.

    Comment


    • #3
      Is it time to shift those worn cutoff wheels to 4" grinder?

      Comment


      • #4
        Originally posted by Roger
        Is it time to shift those worn cutoff wheels to 4" grinder?
        It's strange, but they don't work as good on a 4" grinder. They wear too fast, but on a 5" grinder, they do just fine.... and I speak of the .040" wheels not the 1/8".

        Comment


        • #5
          What RPM does your 5" grinder spin the disc? My 4.5" rt-angle grinder rotates disc at 10,000 RPM.

          Comment


          • #6
            Originally posted by Roger
            What RPM does your 5" grinder spin the disc? My 4.5" rt-angle grinder rotates disc at 10,000 RPM.
            Mine turns at 11, 000...seems to make a difference.

            Comment


            • #7
              Originally posted by russell
              Edge speed increases with diameter,so that at the same rpm the 5" would still be traveling faster at the edge than the 4" or 4 1/2".......and I would think that the extra velocity would add to the beam strength and aggressiveness of the disc....which I think should make it cut faster with more metal removed per disc.....of course I have been wrong before......

              russell
              Let me pose a question....First off, Russell, let me say I think you're right...Now...a 5" disk traveling at 11,000RPM at the parimeter, is traveling at how many RPMs at the center?

              Comment


              • #8
                14399 ft per minute or 163mph @ the edge on a 5" disk @ 11k rpm and 10742 ft per minute or 122 mph @ the edge for a 4" wheel on a 10k rpm grinder for a difference of 3926 ft per minute or 41 [email protected] the cutting edge.

                ~Nate~
                NCLS LLC.~ Big Nate's Plowing
                ~~~~~~ I like a nice piece of SCRAP~~~~~~
                NCLS LLC- SMR Division (Scrap Metal Recycling)
                I FOUND A CHEAP TIG :~D

                Comment


                • #9
                  I'm with Dave, I discovered a new tool. A friend told me about those .045 wheels about a year or more ago. And I bet I've used 2-3 dozen since then. I love them. Thick/thin/big/small ... nothing I can't tear up quickly now It's quick, precise, doesn't get stuff all HOT like using the torch and incredibly versatile. can't say enough good things about them.

                  - jack

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                  • #10
                    any body use the 1 mm thick metabo 4 1/2" discs? those are quicker then a torch on 1/8" and 1/4"

                    and yes the numbers are pretty impressive considering a 21" lawnmower blade @ 3000 rpm travels @ 187 mph

                    ~Nate~
                    NCLS LLC.~ Big Nate's Plowing
                    ~~~~~~ I like a nice piece of SCRAP~~~~~~
                    NCLS LLC- SMR Division (Scrap Metal Recycling)
                    I FOUND A CHEAP TIG :~D

                    Comment


                    • #11
                      Originally posted by aweaver
                      Rocky D's trick question: "Let me pose a question....First off, Russell, let me say I think you're right...Now...a 5" disk traveling at 11,000RPM at the parimeter, is traveling at how many RPMs at the center? "

                      Answer: 11,000RPM. RPMs are the same regardless of where on the rotating object they are measured.

                      Don't know if he meant it to be a trick question......

                      Big Nate's numbers check out, otherwise.
                      Yeah, you got it...it was a trick question. RPM's are the same...IPM's are different.

                      I discovered that when I had to program an Orbital Tube Welder.

                      Comment


                      • #12
                        IPM?

                        Originally posted by Rocky D


                        Yeah, you got it...it was a trick question. RPM's are the same...IPM's are different.

                        I discovered that when I had to program an Orbital Tube Welder.
                        Ok Rocky D,how many IPM at the exact center.That should keep you busy for a while.

                        Comment


                        • #13
                          Re: IPM?

                          Originally posted by Scott V


                          Ok Rocky D,how many IPM at the exact center.That should keep you busy for a while.
                          Yeah....right

                          Comment


                          • #14
                            a 5/8" shaft spinning @ 10000 rpm makes for 19635 ipm @ the edge or 18 mph
                            Last edited by Big Nate; 02-07-2003, 05:33 PM.
                            NCLS LLC.~ Big Nate's Plowing
                            ~~~~~~ I like a nice piece of SCRAP~~~~~~
                            NCLS LLC- SMR Division (Scrap Metal Recycling)
                            I FOUND A CHEAP TIG :~D

                            Comment

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