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  • Small Clutches / AMFDOCTOR

    Once again it's time to bring up an old subject and stir the pot, only
    this time with the help of Pin Feed, the problem just might finally be
    solved.
    For those of us who have been on BT for awhile, my apoligies to the
    newer members since this subject has not been around for a long time,
    we all can remember the threads about both AMF's and Vantages's small
    clutches. Overheating, causing direct drive and all kinds of other dist
    trouble. Just about everyone that had them at sometime or other had to
    pull them. I'll bet that there are a few die hards that still have them
    going though. This past summer I went to Omaha to visit our sister
    center, and to see Pin Feed's front roller guards. While looking at the
    guards, I saw nothing but small clutches on all his machines. After
    talking awhile he explained and gave me one of his setups. By his
    request I'm going to try and relate his ideas to all of you along with
    some pictures of one of his clutches on my machine along with other
    ones that I have made. The problem as we know is that after awhile the
    clutch gets so hot that it puts so much tension on it that it runs in a
    direct drive mode. To make a long story short, the outer plate is fixed
    to the shaft and the spring and nut are turning at the speed of the
    shaft. If you look at the outer plate you'll see a ring around the
    square hole, the spring is dragging on the plate and nut. This causes
    friction and the spring starts to get hot and hoter till one to one
    drive. The solution to this is to have the outer plate float on the
    shaft and lock the spring to the plate and nut. Once this happens there
    is no spring movement to cause overheating. Pin Feed had stainless
    steel washers made up for his new outer plates, about thre times as
    thick as the original plate. He then used a spring from the hardware
    store, same coil and wire size and cut a tapered slot in the washer to
    accept the spring. Next he took a 5/8-18 nut and cut a tapered slot in
    it and also drilled and taped a 1/4-20 hole on the side of the nut to
    secure it to one of the flats on the shaft. Put it together, tighten it
    down and you're off to the races. Some might say thta it's a lot of
    trouble to do it, maybe, but the more I watch it run, it just looks and
    runs better to me.As you look at the pics you'll notice that all my
    clutches are home made roller clutches. The current setup is running
    just fine and the bearings are repackable.

    Pictures #1 and #2 show the clutch using the rear AMF plate.
    Pictures #3, #4, and #5 show the clutch using the present day rear
    plate and Pin Feed's setup. See how the spring is turned into the outer
    plate.
    Pictures #6, #7, and #8 show a brake roller clutch with no brake lining
    in it - using a leather strap.
    Picture #9 has all the different parts used in making both setups.
    Picture #10 shows both inner plates. Make sure that you polish them up
    before using, the shinier the better.
    Pictures #11 shows the washer and one with the spring welded to it. I
    opted to weld rather than grind. Once the spring is welded to the
    washer I cut the spring 180 degrees from the end. This is to lock it
    into the nut..
    Pictures #13 and #14 show how I cut the nut to accept the spring. I
    drilled and tapped the nut for a10-24 set screw.
    Picture #15 shows the clutch disks, Enviro, AMF, Vantage. Have all
    three running and no trouble.

    The setup that Pin Feed gave me has been in a machine since August and
    has not acted up. I would allow a few days once you install one foir
    everything to seat itself. There maybe some adj here and there also.
    Once dialed in, that's it.
    I'd like to thank Pin Feed for sharing this info with me and I hope
    that if you try it you'll have the same good luck.

    As always questions and comments are wecome,

    AMF DOCTOR
    The doctor makes house calls.

    ***To things that I forgot to put in the main body:

    The first is that you'll have to use a sleeveless pinion bushing in the
    gear. Either the AMF plastic or I prefer Enviro.
    Second, if you use the current inner plate make sure and grind down the
    tabs that are on the gear so that the clutch disk can pass over them
    without dragging on them.


    AMF DOCTOR
    The doctor makes house calls.
    If at first you don't succeed, try, try, again. Then quit. There's no use being a damn fool about it." -W.C.Fields

  • #2
    If at first you don't succeed, try, try, again. Then quit. There's no use being a damn fool about it." -W.C.Fields

    Comment


    • #3
      If at first you don't succeed, try, try, again. Then quit. There's no use being a damn fool about it." -W.C.Fields

      Comment


      • #4
        If at first you don't succeed, try, try, again. Then quit. There's no use being a damn fool about it." -W.C.Fields

        Comment


        • #5
          If at first you don't succeed, try, try, again. Then quit. There's no use being a damn fool about it." -W.C.Fields

          Comment


          • #6
            If at first you don't succeed, try, try, again. Then quit. There's no use being a damn fool about it." -W.C.Fields

            Comment


            • #7
              If at first you don't succeed, try, try, again. Then quit. There's no use being a damn fool about it." -W.C.Fields

              Comment


              • #8
                If at first you don't succeed, try, try, again. Then quit. There's no use being a damn fool about it." -W.C.Fields

                Comment


                • #9
                  If at first you don't succeed, try, try, again. Then quit. There's no use being a damn fool about it." -W.C.Fields

                  Comment


                  • #10
                    If at first you don't succeed, try, try, again. Then quit. There's no use being a damn fool about it." -W.C.Fields

                    Comment


                    • #11
                      If at first you don't succeed, try, try, again. Then quit. There's no use being a damn fool about it." -W.C.Fields

                      Comment


                      • #12
                        If at first you don't succeed, try, try, again. Then quit. There's no use being a damn fool about it." -W.C.Fields

                        Comment


                        • #13
                          If at first you don't succeed, try, try, again. Then quit. There's no use being a damn fool about it." -W.C.Fields

                          Comment


                          • #14
                            If at first you don't succeed, try, try, again. Then quit. There's no use being a damn fool about it." -W.C.Fields

                            Comment


                            • #15
                              If at first you don't succeed, try, try, again. Then quit. There's no use being a damn fool about it." -W.C.Fields

                              Comment

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