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K72-80 Chuck Disassembly

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K72-80 Chuck Disassembly

Home › Forums › Beginners questions › K72-80 Chuck Disassembly

Viewing 5 posts - 1 through 5 (of 5 total)
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  • 13 June 2020 at 20:15 #479667
    woody1
    Participant
      @woody1

      Evening all, hope well and safe,

      I have the 80mm 4jaw and have buggered one of the t-slots for want of a better word. It's just a couple of burrs toward the centre. I'm struggling to explain. I think where I have been ham fisted the leading edge of the screw (for want of a better word) has caught on top of the t-slot due to the load and cased three burrs.

      Would any of you kind gents know how I get the screws (scrolls perhaps) out. I can se there are threaded plugs in the rear which will be the way to go. However I'm not sure if threaded (right or left) or just pushed in which I highly doubt.

      Excuse my rubbish explanation.

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      13 June 2020 at 20:15 #10295
      woody1
      Participant
        @woody1

        Buggered my chuck a little

        13 June 2020 at 20:33 #479673
        Alexander Smith 1
        Participant
          @alexandersmith1

          Hi Woody, if it's like a standard 4-jaw chuck, the screws are retained by the plug you can see from the back. The plug has a u- shaped end which locks into a groove about half way along the screw. If you look from the top you should see the groove and the ends of the U at either side. I think there is probably a special tool for getting the u- shaped key out but I've done it in the past with a thin punch- work both sides alternately a little at a time and you should see the plug starting to emerge. To get it out fully you might need to make a punch with a slight bend to get round the corner. I'm not describing this at all well and a picture would be a lot better but all will become clear as the plug emerges.Good luck. Sandy

          13 June 2020 at 20:36 #479674
          old mart
          Participant
            @oldmart

            Photos of both sides of the chuck would help. The  common type are just pushed in with an interference fit. You will probably have to make, or modify a thin punch to knock the offending one out. Before you do that, scratch a line across the plug and the chuck body to help line it up when you refit it. I have removed the plugs from three chucks successfully. Also number them if taking more than one out.

            Edited By old mart on 13/06/2020 20:43:07

            14 June 2020 at 20:05 #479872
            woody1
            Participant
              @woody1

              Thanks guys, I used a bent punch, didn't have to completely remove the yolks, dressed everything up and the chuck is a lot more smooth. All I have to do now is learn how not to tread chucks like a vice!

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