Cut in direction of grain!!!

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  • newood2
    Senior Member
    • Aug 2004
    • 600
    • Brooklyn, NY.
    • BT3100-1

    #1

    Cut in direction of grain!!!

    I've heard this said many times by some of our more knowledgable partners on here. I've also found some articles on the web.
    But I still run into problems when making final router cuts especially in edge profiles, stiles and raise panel. This is mainly with maple. With pine and oak it's easier to determine the direction of the grain.
    With stile routing for example, it's after you start to cut you notice that it's going against the grain and your left with two options, sanding or discarding. You can't flip it around to cut in the opposite direction.
    One other consideration I imagine would be to make the final cut about a 1/64" shave. I'm not sure this would help.
    Test cutting sample on maple to determine grain direction can be a costly sacrifice.
    So what am I doing wrong? How do you get around this?
    Howie
  • poolhound
    Veteran Member
    • Mar 2006
    • 3196
    • Phoenix, AZ
    • BT3100

    #2
    Originally posted by newood2
    One other consideration I imagine would be to make the final cut about a 1/64" shave. I'm not sure this would help.

    Howie
    Taking off too much with each pass can cause problems with or against the grain. How much are you taking off with each pass? try more passes at less depth and yes a final "shave" cut can help.

    Do make sure you are using good quality bits and that they are clean and sharp. 1/2" bits will be more stable than 1/4" (I would guess you already have 1/2" for raised panels). Hold the workpiece firmly, use featherboards to keep it snug against the fence and table.

    Is your router firmly mounted in the table, likewise the plate and set SQ to table.

    If you try and cut against the grain with some woods tearout is tough to avoid. Running a sample through to figure it out may sound expensive but less so than ruining a workpiece.
    Jon

    Phoenix AZ - It's a dry heat
    ________________________________

    We all make mistakes and I should know I've made enough of them
    techzibits.com

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    • Russianwolf
      Veteran Member
      • Jan 2004
      • 3152
      • Martinsburg, WV, USA.
      • One of them there Toy saws

      #3
      You pretty much hit the answer that I use.

      If I'm routing edges that I want to be perfect in the end, I make multiple passes. At least three with the final cut being a very shallow one. By making the multiple shallow passes, you are reducing the amount of leverage the cutter can put on the grain, so tearout is minimized.
      Mike
      Lakota's Dad

      If at first you don't succeed, deny you were trying in the first place.

      Comment

      • pecker
        Established Member
        • Jun 2003
        • 388
        • .

        #4
        Originally posted by Russianwolf
        You pretty much hit the answer that I use.

        If I'm routing edges that I want to be perfect in the end, I make multiple passes. At least three with the final cut being a very shallow one. By making the multiple shallow passes, you are reducing the amount of leverage the cutter can put on the grain, so tearout is minimized.
        I've never tried this with router bits, but when using a thickness planer on woods prone to tearout, brushing some water on the board and then taking a shallow cut definitely helps.

        I wonder if wetting the board edge just prior to making that final, shallow pass might help in this case, too.

        Comment

        • Black wallnut
          cycling to health
          • Jan 2003
          • 5513
          • Ellensburg, Wa, USA.
          • BT3k 1999

          #5
          I've been able to lessen chip out by creating a zero clearance fence opening.
          Donate to my Tour de Cure


          marK in WA and Ryobi Fanatic Association State President ©

          Head servant of the forum

          ©

          Comment

          • drumpriest
            Veteran Member
            • Feb 2004
            • 3338
            • Pittsburgh, Pa, USA.
            • Powermatic PM 2000

            #6
            It's not really chip out with maple, so much, as just rough fibers left on the curly material. I feel your pain. I have not tried wetting the wood either, but I'd be interested in hearing any results. I think you'd really need to do that just before the final pass, as in planing, only the surface needs raising. Small cuts is the best advise I can give, or avoid doing fancy profiles on wood prone to these issues.
            Keith Z. Leonard
            Go Steelers!

            Comment

            • newood2
              Senior Member
              • Aug 2004
              • 600
              • Brooklyn, NY.
              • BT3100-1

              #7
              Originally posted by drumpriest
              It's not really chip out with maple, so much, as just rough fibers left on the curly material. I feel your pain. I have not tried wetting the wood either,
              Yep, those rough fibers, I'll try the water damping before final pass.
              Howie

              Comment

              • rnelson0
                Established Member
                • Feb 2008
                • 424
                • Midlothian, VA (Richmond)
                • Firestorm FS2500TS

                #8
                The Freud QuadraCut bits are supposed to help with this. They have two up- and two down-cut blades which are designed to eliminate tearout and fiber fuzzies. I've read reviews that mark them highly, even considering their additional cost, but I have never used them myself.

                I assume you're also, especially on a stile, cutting with a piece of scrap behind it just to prevent tearout in general?

                Comment

                • pecker
                  Established Member
                  • Jun 2003
                  • 388
                  • .

                  #9
                  One thing I did recently on some stiles, was to cut the full profile in one pass, then run that edge on the jointer to remove 1/32". Then back to the router table, where the stile bit re-milled the profile again. This is the equivalent of taking one last shallow cut without having to reset the router table fence.

                  Comment

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