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R4511 Low Profile Riving Knife - homemade

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  • R4511 Low Profile Riving Knife - homemade

    Finally nailed that one down, just took a while to find the material.

    I ended up getting 1/8" 6063 aluminum plate 6"x12" (make 2 knives) and after making several templates out of masonite and making sure I got the right shape/height, and dimensions, I transfered that to the aluminum plate using a dremel type tool and some file/sandpaper for finishing the edges.

    fits PERFECTLY! I made it a bit closer to the blade than the original splitter, and it's 1 tooth lower than the blade's height.
    Attached Files

  • #2
    Re: R4511 Low Profile Riving Knife - homemade

    really, really nice execution of a very important piece of safety equipment. looks almost factory original. hope you enjoy many hours of trouble free, safe woodworking.
    there's a solution to every problem.....you just have to be willing to find it.

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    • #3
      Re: R4511 Low Profile Riving Knife - homemade

      Nicely done!

      Comment


      • #4
        Re: R4511 Low Profile Riving Knife - homemade

        Any chance you could trace the knife and then scan the trace to a pdf so others could use it as a pattern? I'm waiting on my 4511 to be delivered, and would love to put this riving knife on. Thanks a bunch.

        Joe

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        • #5
          Re: R4511 Low Profile Riving Knife - homemade

          thats a good idea!

          I'll scan the pattern, and upload the PDF tomorrow for anyone that might be interested.

          Comment


          • #6
            Re: R4511 Low Profile Riving Knife - homemade

            here are a PDF, and a smaller JPEG version (jpeg not to scale, just for viewing purposes) of the riving knife I have made.

            notice there are 2 cut lines on the top edge of the knife. the upper one is the blade height (~) and the lower one is ~1/8" lower than the blade height which is MY final height of the knife.

            Also I marked the lower part of the knife where I have it slightly beveled to make it easier to slide it in and out of the saw.

            for scale purposes - the lower part of the knife should be 1 7/16" wide (also marked on the template.

            hope this helps.

            If anybody doesn't have the means to get the material and make it yourself. I put mine (I made 2) on eBay:Low Profile Knife for Ridgid R4511
            Attached Files

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            • #7
              Re: R4511 Low Profile Riving Knife - homemade

              Thanks for going to the trouble to help. Nice job!

              Comment


              • #8
                Re: R4511 Low Profile Riving Knife - homemade

                I'm glad I could help. I know I could use any ideas for improvements myself, so I'm glad I have something to share with everyone else.

                Comment


                • #9
                  Re: R4511 Low Profile Riving Knife - homemade

                  Originally posted by PurpLev View Post
                  Finally nailed that one down, just took a while to find the material.

                  I ended up getting 1/8" 6063 aluminum plate 6"x12" (make 2 knives) and after making several templates out of masonite and making sure I got the right shape/height, and dimensions, I transfered that to the aluminum plate using a dremel type tool and some file/sandpaper for finishing the edges.

                  fits PERFECTLY! I made it a bit closer to the blade than the original splitter, and it's 1 tooth lower than the blade's height.
                  PurpLev

                  I took your drawing and made a digital copy which I took to a friend with a CNC router to make one for me. The OEM riving knife is .09" or 2.3mm thick and I used the 1/8" (.125") aluminum like you did. I couldn't get my knife to fit in the clamp with the quick release but I could get it to fit if I loosened the four allen screws holding the quick release clamp in place. I made a cut but found that the increased thickness of my knife caused the wood to bind between the fence and my new riving knife. I can file down the knife to fit in the quick release clamp but I am concerned about safety of the increased thickness of my 1/8" knife over the OEM one even if I can get it centered behind the blade. Have you had any issues with this?

                  Comment


                  • #10
                    Re: R4511 Low Profile Riving Knife - homemade

                    Originally posted by Sprocketeer View Post
                    PurpLev

                    I took your drawing and made a digital copy which I took to a friend with a CNC router to make one for me. The OEM riving knife is .09" or 2.3mm thick and I used the 1/8" (.125") aluminum like you did. I couldn't get my knife to fit in the clamp with the quick release but I could get it to fit if I loosened the four allen screws holding the quick release clamp in place. I made a cut but found that the increased thickness of my knife caused the wood to bind between the fence and my new riving knife. I can file down the knife to fit in the quick release clamp but I am concerned about safety of the increased thickness of my 1/8" knife over the OEM one even if I can get it centered behind the blade. Have you had any issues with this?
                    Most Certainly this is a concern!

                    I haven't had that issue at all, I use a Forrest WWII blade, and my 1/8" aluminum knife fits without the need to loosen the bolts in the mount. the 2 options you referred to (loosening bolts, and filing the knife) are the 2 ways to handle this each with it's own results. ultimately what you want to have is a knife that aligns with the blade you're using - lower your stance, and look at the blade from the front- you should NOT see the riving knife extruding either to it's left, nor right - if you do, your material and blade have different thicknesses - and are NOT SAFE TO USE in that way! are you using a thin keft blade? you should match the thickness of your knife to the blade you're using.

                    I'm able to use the 1/8" material for both my WWII blade, and also the factory supplied (RIDGID) blade that came with the saw (I use that one for plastics, and other things that I don't care to run by my WWII blade).

                    Comment


                    • #11
                      Re: R4511 Low Profile Riving Knife - homemade

                      I would not recommned the use of 1/8" material to make a Riving knife for use with the blade supplied with the R4511.

                      In my opinion that would be too wide for the supplied blade, which is a thin kerf, .100 width blade. This is why the R4511 supplied splitter is .090 thick...to allow a little clearance so that the splitter doesn't act as a "spreader".

                      Comment


                      • #12
                        Re: R4511 Low Profile Riving Knife - homemade

                        Thanks Tom for the info, as this splitter is all about safety. proper material, and usage is also crucial.

                        I have been using this with a forrest WWII blade originally, but I am also using this with the factory supplied blade (ridgid). and when sighting at the blade from the front, it DOES seem to be completely covering the 1/8" material on both sides. maybe I'm lucky? - point is- make sure that whatever material you choose to use, that it's thinner than the saw blade you're using it with.

                        to repeat myself -this is a full kerf 1/8" riving knife, not a thin-kerf. If you'll see in my template, the front of the knife is beveled to make the leading edge even narrower than the 1/8" kerf (in case the wood binds in)

                        Comment


                        • #13
                          Re: R4511 Low Profile Riving Knife - homemade

                          The Riving knifes supplied by Steel City are 2.5mm (.098"") and 3mm (0.118") thick. See Product Manual at this web site:

                          http://www.steelcitytoolworks.com/pr...12&tool=35900G

                          This Manual also has some very helpfull setup & calibration information. The Ridgid and Steel City Saws are indentical in the inside.

                          Comment


                          • #14
                            Re: R4511 Low Profile Riving Knife - homemade

                            Thanks! There's some great stuff there. I've downloaded a copy, and I'll be hunting that #SC10150 2.5 mm riving knife.
                            De Colores,
                            Dow
                            Boerne, TX

                            Comment


                            • #15
                              Re: R4511 Low Profile Riving Knife - homemade

                              Didn't somebody try the Steel City riving knives? Do you recall what results they had?
                              De Colores,
                              Dow
                              Boerne, TX

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