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Anyone done this with a QCTP ?

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  • Anyone done this with a QCTP ?

    Hmmm... Click image for larger version

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  • #2
    Yep, about fifteen years ago. I needed to turn some rotors for a truck and didn't have quite enough room on my 15" lathe. Almost identical to yours.

    Sarge41

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    • #3
      I did the L shape to get around the back like that. But I did it as a direct mount that went on instead of the tool post. And it was about two hours to build it while the car was up on jacks outside. The setup shown is to the best of my 18 to 20 year old memory of the day.

      1/2" for the L, some 1/4" for the quickie T slot nut and a piece of 1" sq for the tool holder. Hidden by the one C clamp is the first HSS cutter that due to the speed and nature of the rotor would not hold an edge for more than about 1/3 of a pass. Shown ready for cutting is some oddball parallelogram carbide insert with about a .8" IC held in quickly milled seat and with a suitably scaled finger clamp.

      You'll have to supply the image of the rotor disc sitting between the compound turned as shown to get the most reach and the cutter.

      It worked so well that I've kept it all this time thinking I might need it again at some point.... Not so far.... Oh, and thankyou for this little trip down memory lane

      Click image for larger version  Name:	P1040227.JPG Views:	0 Size:	251.9 KB ID:	1947586
      Chilliwack BC, Canada

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      • #4
        Ha- yeah, those 'duallie' rotors... $$$$$

        t
        rusting in Seattle

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        • #5
          Never done it, but seen a similar setup somewhere where there was a tool on BOTH sides, and one had an adjustment screw to dial in thickness.

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          • #6
            I made a tool for both sides for bike rotors....never tried it out though...

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            • #7
              I set up an extra spindle vertically on my mill table to hold the rotor. Spin the rotor on the spindle with it's own bearings with a vee belt around the rotor and a motor. Stationary cutter mounted in the locked mill quill. Move the mill table under the cutter to make the skim cut on the rotor. My rotors were 11 inches and my lathe would only swing 10 inches so this is how I did it. I don't remember how I reached around to do the bottom side but it must have been an L shape as shown above. Replacement rotors are unobtainable and even if I did find them I'd still have to turn them and I don't trust others lol...

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              • #8
                This is how I did it. https://www.youtube.com/watch?v=riDgelmyGTY

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                • #9
                  Well, I have not done a rotor yet, but special tools for an Aloris are whatever you can make
                  Here is one I did when I needed a heavy duty insert, and as you can see, the tail of the tool holder is available for another special modification, like a boring tool holder or whatever
                  The insert "Clamp" is one of two I made so I can mount either left or right 'grooved" inserts in this holder

                  Rich
                  Click image for larger version

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                  Green Bay, WI

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                  • #10
                    So long ago, I don't think I can find any pictures, but I needed to skim my bike's front wheel brake drum. The drum was only 8", but I didn't want to relace the wheel, so I had to devise a way to spin the whole wheel.

                    Picture my 6ft x 2ft bench, with angle for a frame round one end, with two 2ft I-beams overhung at the end. Wheel axle mounted between the I beams, and a cross slide and top slide mounted on the end of the bench, with the wheel spun from a motor and belt.

                    I had a Lorch plain lathe then, and I just lifted the whole cross slide and top slide to use. The bike stopped on a sixpence after that, and there's a corner of the attic with all the kit waiting for its next turn.

                    I like it when enthusiasm for an outrageous project actually works for once.
                    Richard - SW London, UK, EU.

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                    • #11
                      I'm curious why QCTP was brought up other than to rile up the dead argument. It's no different, just turn it 90°.
                      21" Royersford Excelsior CamelBack Drillpress Restoration
                      1943 Sidney 16x54 Lathe Restoration

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                      • #12
                        Doesn't that inside cutter chatter ?? That's a lot hanging out there plus going around the rotor. Looks like one big torsion bar setup to me.

                        Are you turning both sides at the same time ? if so how are you adjusting it ? Or are you doing one side at a time ?



                        JL................

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                        • #13
                          Mechanic at my old job was showing me how they don't even have to take the rotors off to turn them any more. The brake lathe uses the vehicle's own wheel bearings fro a spindle bearing, spins it with the lug studs and feeds the tool after you bolt the brake lathe onto the vehicle. Entire operation only takes minutes, but the machine ain't cheap.
                          25 miles north of Buffalo NY, USA

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                          • #14
                            Originally posted by nickel-city-fab View Post
                            Mechanic at my old job was showing me how they don't even have to take the rotors off to turn them any more. The brake lathe uses the vehicle's own wheel bearings fro a spindle bearing, spins it with the lug studs and feeds the tool after you bolt the brake lathe onto the vehicle. Entire operation only takes minutes, but the machine ain't cheap.
                            The standard thing now for any later model seems to be to just change out the rotors. The ones for my two vehicles at present are about $70.
                            Chilliwack BC, Canada

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                            • #15
                              Originally posted by BCRider View Post

                              The standard thing now for any later model seems to be to just change out the rotors. The ones for my two vehicles at present are about $70.
                              They are pretty cheap these days for many cars, but if the OP's' are one piece. They don't look all that cheat. But I will keep this setup in mind should the opportunity to use it arise.

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