Runout and spacers

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  • Bill Stock
    Established Member
    • Nov 2006
    • 186
    • Canada, Eh!
    • BT3100
    #1

    Runout and spacers

    I was getting some poor quality rips, so after some investigation I replaced the gripper on the back of my rip fence. The rips were still less than stellar, so I invested in a couple of new blades and a dial indicator to check for runout. I don't have a fixture block (yet), so I can't check the actual arbor runout. But both blades are reading about .025 of runout.

    Do the spacers contribute to the runout? There's also a good chance I've overtightened the arbor nut (bent the wrench once); whats the cure, new arbor washers?
    Tags: None
    • LCHIEN
      Super Moderator
      • Dec 2002
      • 21971
      • Katy, TX, USA.
      • BT3000 vintage 1999
      #2
      spacers are not soft material I don't think you can bend them.
      Tightening the arbor - its been stated here may times you just need a bit more than snug. If you lean on them like a gorilla you will distort the blade, washers, etc.

      what kind of blades, cheapies or good ones?
      Loring in Katy, TX USA
      If your only tool is a hammer, you tend to treat all problems as if they were nails.
      BT3 FAQ - https://www.sawdustzone.org/forum/di...sked-questions

        Comment

        • cgallery
          Veteran Member
          • Sep 2004
          • 4503
          • Milwaukee, WI
          • BT3K
          #3
          I have had to replace arbor washers in the past for this exact same reason.

          I would suggest cleaning the ones you have thoroughly and trying them again. If you still see lots of runout...

          Put a mark on each washer. Align the marks with a mark on the blade. Measure blade runout and mark the blade for high and low readings.

          Now loosen the nut, and spin the washers 180-degrees in relation to the blade and tighten the nut again. Now measure blade runout. If the high and low readings have reversed 180-degrees, then you probably do have a problem with one or both arbor washers.

            Comment

            • Bill Stock
              Established Member
              • Nov 2006
              • 186
              • Canada, Eh!
              • BT3100
              #4
              Originally posted by LCHIEN
              what kind of blades, cheapies or good ones?
              Both blades are Dimar, not Forrest, but SNB crap either.

                Comment

                • Bill Stock
                  Established Member
                  • Nov 2006
                  • 186
                  • Canada, Eh!
                  • BT3100
                  #5
                  Originally posted by cgallery
                  I have had to replace arbor washers in the past for this exact same reason.

                  I would suggest cleaning the ones you have thoroughly and trying them again. If you still see lots of runout...

                  Put a mark on each washer. Align the marks with a mark on the blade. Measure blade runout and mark the blade for high and low readings.

                  Now loosen the nut, and spin the washers 180-degrees in relation to the blade and tighten the nut again. Now measure blade runout. If the high and low readings have reversed 180-degrees, then you probably do have a problem with one or both arbor washers.
                  Thanks, that's a good tip. Once I rule out the arbor I might just replace the spacers and washers.

                    Comment

                    • cdub101
                      Forum Newbie
                      • Jul 2007
                      • 49
                      #6
                      Similar issue

                      I have had a similar issue. Do you need to go through the manufaturer to get new arbors and spacers?

                        Comment

                        • cgallery
                          Veteran Member
                          • Sep 2004
                          • 4503
                          • Milwaukee, WI
                          • BT3K
                          #7
                          Originally posted by cdub101
                          I have had a similar issue. Do you need to go through the manufaturer to get new arbors and spacers?
                          You can try contacting the manufacturer and see if they will provide anything for free. But seeing as most of these saws should no longer be under warranty, your best bet is ordering them from m-and-d.com or sears parts website.

                          BTW, the most likely point of failure would be the arbor spacers. A bent arbor is pretty unlikely.

                            Comment

                            • Bill Stock
                              Established Member
                              • Nov 2006
                              • 186
                              • Canada, Eh!
                              • BT3100
                              #8
                              Originally posted by cgallery
                              You can try contacting the manufacturer and see if they will provide anything for free. But seeing as most of these saws should no longer be under warranty, your best bet is ordering them from m-and-d.com or sears parts website.
                              M-and-D don't seem to sell the Arbor washers (TTI-69401030) and Mowtown won't ship to Canada.


                              969205001 no longer seems to be available.

                                Comment

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