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balancing bench grinder wheels

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  • balancing bench grinder wheels

    I think this has been addressed before but I can't find how to search
    the archives. Soninlaw just got a bench grinder with 8 by 1 inch
    aluminium oxide wheels and one or both are out of balance. (also a
    little out of round) So am going to dress first but if still shakes would
    like to balance the wheels. So where and how should the material be
    removed? I've looked at the washers and they seen to be good, at
    least no sign of dings etc. I could make a pair (2 sets :-) ) of
    machined ones but not till I get home in a month. Also without a pair
    of parallel, level knife edges to set a shaft on how good a balance
    could I expect to get just depending on the wheel rolling on a shaft?
    Or any other suggestions would be apprecaited.
    Thanks.
    ...lew...

  • #2
    Lew
    A back woods get it done - -
    You can fill in the thought behind the rough idea.
    Don't have time, at moment, to cover all details.

    IF the shaft is turning true enough - - -
    Put the grinder base on some soft sponge.
    Then torsionally wiggle the grinder frame by hand.

    The wheels (and shaft) will seek the heavy side down.

    If you whittle some sheet metal squares with hole in center. Place those under the wheel flanges and whack off the corners to lighten the heavy side.
    Watch your index marks.

    Hth Ag

    Comment


    • #3
      So where and how should the material be
      removed?
      Start by loosening the nut that holds the wheel on the arbor. Remove wheel and carefully smash with big hammer. Then buy some good wheels.
      Free software for calculating bolt circles and similar: Click Here

      Comment


      • #4
        I recently received a gift coupon for Lee Valley Tools and decided to get the Oneway balancing system for grinding wheels http://www.leevalley.com/wood/page.a...26&cat=1,43072

        Sure one could make a set but I am glad I bought it. It can accomodate wheels with up to a 1 1/4" arbor (mine is a 1/2"). It does two wheels and they stay with the wheel so swapping out is a breeze.

        The flanges are substantial, it is easy to set up and the sytems is well finished.

        I am a happy camper.

        Geoff

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        • #5
          Quality grinding wheels will be both balanced and round.
          Free software for calculating bolt circles and similar: Click Here

          Comment


          • #6
            Somebody should tell the good folks at Norton about that new idea that grinding wheels should be balanced and round. Apparently they have forgotten it.
            1601

            Keep eye on ball.
            Hashim Khan

            Comment


            • #7
              The wheels my wife sells are both balanced and round. If not they are defective and replaced.

              [added] They are also made in USA, unlike Norton.
              Last edited by Evan; 07-04-2007, 10:14 AM.
              Free software for calculating bolt circles and similar: Click Here

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              • #8
                Originally posted by Evan
                The wheels my wife sells are both balanced and round. If not they are defective and replaced.[added] They are also made in USA, unlike Norton.
                Are they available down this way Evan??
                Ken.

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                • #9
                  True them up first, if that doesnt bring them around it means there is deviation in the wheel material itself, if thats the case then pitch em.

                  Comment


                  • #10
                    Quality grinding wheels

                    About 5 years ago, switched to Walter Abrasives, for all of my grinding wheels and flap disks, so far everything I bought was made in Canada, never had a problem. Good pricing and excellent quality, two features today that seem some what unrelated.

                    jack
                    jack

                    Comment


                    • #11
                      There is a wheel balancing method described here that might be helpful:

                      http://www.homemetalshopclub.org/news/sep04/sep04.html

                      John
                      Location: Newtown, CT USA

                      Comment


                      • #12
                        Originally posted by Evan
                        They are also made in USA, unlike Norton.
                        Norton's cheap consumer-grade ("Gemini") wheels are made in China, but the good toolroom wheels are still made in the USA.

                        I just bought a Norton TG (Seeded Gel) wheel and it's Made in the USA.
                        I just checked a "conventional" (aluminum oxide) Norton 32AA I bought on the same order (from J&L), and that's Made in the USA also.
                        Last edited by lazlo; 07-04-2007, 01:02 PM.
                        "Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did."

                        Comment


                        • #13
                          I'm not trying to advertise for my wife but trying to make a point. The fact that wheel balancers exist is a commentary on the state of the industry. There are only three manufacturers of grinding wheels left in North America. Very recently she had a customer complaint about out of round wheels. I check these sorts of things for her and in this case couldn't chuck them up in the lathe. I made a special arbor for my mill and checked them that way. Two of the wheels had a run out of around .025" and another was .080". They were replaced. The manufacturer apologized and explained that they had a bad batch but though they had caught them all before shipping.

                          An out of balance condition with no runout (after dressing) indicates a density problem. This is a possibly hazardous situation as it indicates improper packing of the grit.
                          Free software for calculating bolt circles and similar: Click Here

                          Comment


                          • #14
                            Dodgy grinding wheels

                            I agree with Evan. Get rid of those wheels and buy some new ones. I could introduce you to a woman who is a widow because her late husband saved a few pounds on grinding wheels and ended up with a chunk of carborundum through his skull.
                            Welcome to Rustmart, "What we make will never break"

                            Comment


                            • #15
                              whether it's balanced or not is a matter of degree isn't it? what might be fine for a bench grinder is out of balance for a surface or t&c grinder etc. also has to do with the weight of the machine. large heavy stuff will absorb a level of out of balance that my light t&c wont' for example. imo workmanship can be improved by balancing but its overkill on a bench grinder...asuming a decent wheel to start with

                              here's some pics i put up on the process, basically following Jan's example

                              http://bbs.homeshopmachinist.net/sho...ight=balancing
                              .

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