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Knurling tools

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  • Knurling tools

    I have been doing some knurling on my SB 10K I notice the gibs on my carriage croos slide and compound rest get loose when I am finished. The knurling operation seems to put more strain on my machine than I like.

    Have any of you used the knurling tools with the clamp or scissor type action. I have priced them the cheapest ones I have seen start around $100. I don't want to spend the money unless they are a real good tool.
    Thanks Mike

  • #2
    Mike: There are a couple on sale in the Enco sale flyer that arrived here today. Your choice of USA or import.

    I built a knurling tool that was in HSM a few years ago. It was one of Rudy's projects, and it worked out fine on my 12" Atlas. Now that I've upgraded to a bigger lathe I need to make a larger tool, or spring for a commercial one.

    If you do wind up getting one of the "Eagle Rock" type, let us know what you think of it.

    Regards, Tim
    I cut it off twice; it's still too short
    Oregon, USA


    • #3
      Spend the bread. You definitely want a scissor type of knurling tool. It puts a LOT less strain on the machine as compared to a single point type tool, which puts one way pressure on the spindle bearings and everything else. That's why your gibs are coming loose. The scissor type is a balanced knurling tool, pressure is only between the 2 rollers, not the tool post and bearings.


      • #4
        I have an American made scissor type and it works great. Doesn't take much pressure to work.


        • #5
          I made a scissor type for my mini-lathe, works pretty good.
          Also, one of the Bedside Readers has drawings for one.
          I'm not brave enough to try the "push" type one a itty-bitty lathe.


          • #6
            Thanks for a timely topic. I was considering buying one of the cheaper type. Now I know I need to spend a little more.
            I already have problems with my cross slide shaft staying adjusted. I am planning on an upgrade for that already, but I certainly can appreciate not exerting too much undue pressure on a 7x12.


            • #7
              I made one of the 'pinch' type, described by Rudy Kouhoupt. Made it very tight..any tighter and I wouldn't have been able to move it. Nevertheless, on about the 3rd or 4th use the arms were deflecting quite a bit.
              I used aluminum for the body, maybe shoulda used steel.

              I got a tool catalog from Victor a couple of days ago that had the scissor type for 47.90 (2 1/4" capacity) or 69.50 for capacity of 2 1/4 to 4 1/2". ...said to fit Dorian and similar QC tool systems. Those are the lowest prices I've seen.
              Lynn (Huntsville, AL)


              • #8
                Can you send me a link to Victor I have not heard of them before thanks guys for the reapplies I wanted to make sure these type of knurling tools worked good by the comments it sounds like they do. I had thought about making one but I was not sure what type of material to use.

                I have been making a lot of adjustment knobs for my gun rests. I use barrel blanks that were culled by the barrel shop for one reason or another 1.25". I knurl about 10" at a time then part off small segments for my knobs. I use my steady rest to keep the tension off of the spindle. I noticed after each time I knurled I would need to tighten my gib screws to remove the excess play out of the cross slide and compound rest. I feed the knurling tool in about .005" each pass and make about 8 passes. Is that too aggressive for my SB 10K? Barrel material is fairly soft and machines real good. I am not sure exactly what the hardness rating of the material is I use both chromoly and SS barrels. Thanks again for all the help.


                • #9
                  Great tool, the imported ones are made in India, and they do not included the coarser knurling wheels which you use most. The material of the tool itself is very soft and the setscrews of the tool holder do a number on the part, which fits in you holder. Spent a little more and buy the better quality ones.


                  • #10
                    I bought one of the knurling tools made in India. I added a piece of 1/2" square stock on the right side of the tool.The square stock fits in my tool holder. I use
                    plenty of cutting oil and start out with
                    light cuts.Make sure that the diameter of
                    your stock is divisable by the number of teeth on the knurl so that the knurls cut in the same groove. I have 52 teeth on my
                    3/4" diameter knurls, so .750/52=.014423"
                    So the diameter of your stock has to have
                    .014423" divide into it evenly. Or to put
                    it another way be a multiple of .014423"
                    I am satisfied with the way my scissor type
                    knurler works.


                    • #11
                      Victor is at:
                      email: [email protected]
                      toll free: 1-800-723-5359
                      They're in NY,NY.

                      I don't specifically remember buying anything from them (must have since they send me a catalog every few months), so I have no comments about their goods or service.

                      Their knurling tool ad says a pair of 3/4" medium diamond knurls are included BTW.
                      Lynn (Huntsville, AL)


                      • #12
                        I bought some stuff from Victor once or twice before. Their service was prompt and I got everything as ordered. You can sign up for their monthly sales via email or they'll keep sending you the flyers if you order. No connection - just a satisfied customer.

                        Tom B


                        • #13
                          Yankee 1

                          Been thinking about doing something similar to your method.
                          Did you weld 1/2" pc on or fasten some other way?

                          How hard is the shank on these tools?

                          [This message has been edited by Russ H (edited 07-26-2004).]


                          • #14
                            I have an Eagle Rock tool. It is a well made tool that does good work. I ordered it from Enco and went ahead and spent the extra money for the Eagle Rock I've been pleased with the purchase.


                            • #15
                              Thanks for all the advise ENCO has the knurling tool on sale (import) for $28.99 and extra wheels for $4.99. I just ordered a tool and coarse set of wheels.

                              [This message has been edited by gundog (edited 07-27-2004).]