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Shell mills for 40 taper?

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  • Shell mills for 40 taper?

    Hey guys! Just wondering...what is the limit on size for shell mills/face mills for 40 taper verticle (turret)mills?
    I'd really like to have another 50 taper horizontal but a verticle would be handier overall. I have some of my 50 taper tooling left and a couple of 6" shell mills that I really like. I'm bettin they'd be too big for a 40 taper setup tho??????
    Thanks!
    Russ
    I have tools I don't even know I own...

  • #2
    The size you use isn't as much a factor as is how much LOAD you put on it. How much HP does the 40 taper spindle have at hand?

    On a typical 15 or 20HP CAT40 spindle, I usually see nothing bigger than a 4" cutter, sometimes only 3". That may have as much to do with the distance between toolchanger pockets as it does cutter efficiency and diameter.

    What machine and how much torque/HP is there? Does it have a toolchanger to be concerned about?

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    • #3
      I realize that I can put a 2 foot diameter cutter on any mill...and not cut with it. I'm just asking what would be typical on a turret mill...guess I shoulda said...in the 2 to 3 hp range. BTW..I ran these shell mills on an old horizontal with 3 hp and they worked great. And no...there is no tool changer...just a plain old manual turret mill I'm thinkin of buying.
      Thanks!
      Russ
      I have tools I don't even know I own...

      Comment


      • #4
        Russ,on our old Polamco mill at work I have a 4" and a 6" and seldom ever run the 6"
        The machine is NT40 taper both vertical and horizonal with the vertical spindle being 3-1/2hp IIRC.

        These shell mills are nice-

        http://www.glacern.com/fm45
        I just need one more tool,just one!

        Comment


        • #5
          What is the difference between a shell mill and a face mill?
          Location: The Black Forest in Germany

          How to become a millionaire: Start out with 10 million and take up machining as a hobby!

          Comment


          • #6
            Originally posted by Black Forest
            What is the difference between a shell mill and a face mill?
            IIRC a Shell mill is one where the shank is a seprate piece from the cutter itself and a Face mill is one type of Shell mill.

            There are also Shell Reamers where the shank is a seperate piece from the Reamer itself.
            I just need one more tool,just one!

            Comment


            • #7
              Shell mills are usually high speed steel cutters which have a precision ground bore and counterbore to mate with the pilot diameter and cap screw of a shell mill holder. I found lots of HSS shell mill images using Google Images, but wasn't inclined to copy and paste them.

              Face mills are now usually carbide insert cutters that use shell mill arbors for mounting, and the term is most-often used when referring to a 75؛, 45؛ or other lead angle type of mill rather than a 90؛ shoulder mill. You can mill a face with a shoulder mill, but you can't mill a shoulder with a face mill!

              BTW, those FM45 face mills are OK for sub-5HP machines, but I have two friends (who both own small job shops) who have stopped using theirs on there 7.5 and 10HP CAT40 spindles. The cutters seem to be a little weak in the insert pocket. Note the close-up of cutter where it shows the insert nested in the pocket with just a thin strip of metal to register the insert edge, but a relatively large diameter hole drilled as a corner relief. I'd shop for a good (if used) Coromant R245, Kennametal KSSR, Valenite VSR or Walter F2334 if I wanted something that could take an accidental hit or insert failure.
              Last edited by PixMan; 02-05-2012, 12:19 PM.

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              • #8
                Apparently the terms get used fairly loosely-

                Insert Shell Mill-

                http://news.thomasnet.com/fullstory/...removal-584989
                I just need one more tool,just one!

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                • #9
                  Regular HSS shell mills and shop made holders


                  1601

                  Keep eye on ball.
                  Hashim Khan

                  Comment


                  • #10
                    Originally posted by J Tiers
                    Regular HSS shell mills and shop made holders



                    OK now I know what you mean. A Walzenfrنser!
                    Location: The Black Forest in Germany

                    How to become a millionaire: Start out with 10 million and take up machining as a hobby!

                    Comment


                    • #11
                      My favourite one is a Kennametal 6". It is listed in their catalog as a shell mill. I really don't care that it was meant for a 25 hp machine or whatever...it worked fantastic on my ol Ohio...top rpm 484. I kept it as I was hoping for another heavy horizontal one day.
                      I've never ran or owned a 40T vertical turret so I'm wondering if it would handle the cutter size ok with light cuts? Say .050 or so...
                      My Ohio could take .150 doc with ease but I'm not fooling myself when it comes to turret machines. I'm just trying to avoid another wimpy R-8. I kept a bunch of R-8 tooling as well but would like a heavier taper.
                      I have tools I don't even know I own...

                      Comment


                      • #12
                        Hey Torker, I have a horizontal mill I will give you. You just have to come get it. 7.5 hp MT5 tooling. I have lots of tooling for it. Power feeds and rapid traverse on XYZ. Only weighs around 4500 lbs. Then you can use your shell mill with confidence.
                        Location: The Black Forest in Germany

                        How to become a millionaire: Start out with 10 million and take up machining as a hobby!

                        Comment


                        • #13
                          Originally posted by Black Forest
                          Hey Torker, I have a horizontal mill I will give you. You just have to come get it. 7.5 hp MT5 tooling. I have lots of tooling for it. Power feeds and rapid traverse on XYZ. Only weighs around 4500 lbs. Then you can use your shell mill with confidence.
                          He he...thanks! I just sold one awile back...weighed almost 7000 pounds....nice big 50T van Norman. I'd prolly need a boat to come get yours huh? LOL!
                          I have tools I don't even know I own...

                          Comment


                          • #14
                            NO a Ford dually would work.
                            Location: The Black Forest in Germany

                            How to become a millionaire: Start out with 10 million and take up machining as a hobby!

                            Comment


                            • #15
                              Originally posted by Black Forest
                              NO a Ford dually would work.
                              Yabut...they get wet...
                              I have tools I don't even know I own...

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