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  • lathe spindle repair options

    Hi,

    I have Rockwell 46-201 wood lathe that I picked up a few years ago. Sandblasted and painted it, replaced a few missing pieces, and installed new bearings. The threads on the spindle (1" 8tpi) are pretty rough. The spindle is not available for purchase new anymore. I have attached a few pictures. Anyone have any idea if the threads can be repaired, suggestions, or leads on any used spindles. The lathe came out of a high school.

    Thank you.

    Jason


    IMG_4319.jpgIMG_4317.jpgIMG_4320.jpg

  • #2

    Re: lathe spindle repair options

    Re: lathe spindle repair options

    thats a lot of wear!!

    you have a couple of options that i know of, have a spindle made or find another spindle(less used)

    try over on owwm.org, should be some one over there who could have suggestions or even a spindle

    is the wear on the outboard side?
    my shop is a beaver lodge
    steve, sarnia, ont

    sigpic

    1940's Beaver Jointer

    Comment


    • #3

      Re: lathe spindle repair options

      Re: lathe spindle repair options

      I don't know if there is anything you can do to repair the threads..or where to get a new spindle, but I would question whether it's nescesary. There are no cracks or breaks, so I think any loss of strength would be miniscule. Guess it depends on the turning you plan to do.
      Maybe there is an issue with the top of the threads being ground down and there are some good turners here who can comment on that

      Comment


      • #4

        Re: lathe spindle repair options

        Re: lathe spindle repair options

        A machine shop could tig weld it up and re-thread, or turn it down, and make a new threaded pc to go over the turned down portion (either tig welded on or threaded on).

        Saw this on ebay. not sure if you could make it work (maybe have the other end threaded?)
        http://cgi.ebay.com/Ornamental-wood-...item53da28bc1b

        scott

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        • #5

          Re: lathe spindle repair options

          Re: lathe spindle repair options

          Originally posted by jasong View Post
          Hi,

          I have Rockwell 46-201 wood lathe that I picked up a few years ago. Sandblasted and painted it, replaced a few missing pieces, and installed new bearings. The threads on the spindle (1" 8tpi) are pretty rough. The spindle is not available for purchase new anymore. I have attached a few pictures. Anyone have any idea if the threads can be repaired, suggestions, or leads on any used spindles. The lathe came out of a high school.

          Thank you.

          Jason


          [ATTACH=CONFIG]34292[/ATTACH][ATTACH=CONFIG]34291[/ATTACH][ATTACH=CONFIG]34290[/ATTACH]
          Hi Jason
          I am not familiar with that brand of lathe but most lathes rely on the back register to mount things.So as long as the threads are engaged it is the registration of the machined surface of the faceplate or chuck to the shoulder on the mandrel the makes the alignment and drive.Damage to the top of the threads is not that important as long as they engage properly

          Comment


          • #6

            Re: lathe spindle repair options

            Re: lathe spindle repair options

            Forget about building up the threats by welding or brazing, as you would end up with a warped spindle, also the MT would be off as the shrinking of the welds would do that.
            The outboard thread does look rough and was probably held with pliers to unscrew the face plate or chuck on the inboard side.
            Why do you want to repair the outboard thread ??, is it used for more than the retainer nut ?? do you want to use a hand wheel on there ?? or something else ??

            I would look in Ebay and Kijiji etc, to have a new spindle made is going to pretty costly in my estimation, as with the MT in it and left and right treads to be machined on it, unless you have a good machinist friend.
            sigpic
            Have fun and take care
            Leo Van Der Loo

            Comment


            • #7

              Re: lathe spindle repair options

              Re: lathe spindle repair options

              Leo, a GOOD TIG welder could probably weld each thread so well that you could thread a nut in it! It is very doable without warping the shaft. I would not use any other welding process than TIG if you go that route.

              Comment


              • #8

                Re: lathe spindle repair options

                Re: lathe spindle repair options

                Scott I have welded a lot in my life, even made my living for some time as a welder here in Canada, what you don't seem to take into account, is that welding (any kind) deposits liquid metal on to the workpiece and melts the surface were it is deposited, that metal shrinks immediately and starts to deform the still hot workpiece as the welding is going from one side to the other, in this case where the shaft being welded is hollow, it will for certain deform the MT and very probably also warp the shaft, even a little change in the MT opening and it would have to be re-machined, anyway it isn't just as easy as welding up dozer tracks etc where shape doesn't have to be within close tolerances, or welding even ridges on a solid bold that only needs a nut to be able to thread onto.
                You just can't have water run uphill or liquify metal and then let it cool without shrinkage.
                sigpic
                Have fun and take care
                Leo Van Der Loo

                Comment


                • #9

                  Re: lathe spindle repair options

                  Re: lathe spindle repair options

                  This is a type of repair I do quite often on worn and broken shafts usually in gearboxes. Like Leo states there is going to be a problem with the MT. You'll need it done by some one with an MT2 reamer. If they have the reamer it is just as easy the build a new shaft. I don't have the reamer and that's why neither does the spindle in my 3400 lol. They are about $80. I should just get one I guess. I could turn that shaft out in about an hour if I had the reamer

                  Comment


                  • #10

                    Re: lathe spindle repair options

                    Re: lathe spindle repair options

                    if it makes a difference, the outboard thread is a lefthand, does it even have a morse taper in it?, maybe not on the outboard side, it will be bored for a knock out rod
                    my shop is a beaver lodge
                    steve, sarnia, ont

                    sigpic

                    1940's Beaver Jointer

                    Comment


                    • #11

                      Re: lathe spindle repair options

                      Re: lathe spindle repair options

                      not much of a wood lathe guy, but is there another smaller thread that is standard to the woodturning trade, that you could have the worn out thread turned down too. It would just have to be larger than the root of the 1" thread.

                      Comment


                      • #12

                        Re: lathe spindle repair options

                        Re: lathe spindle repair options

                        You are only showing the outboard thread and the other doesn't look that bad from the view shown. Why not put a faceplate on it and see what it will run like? It's not like it will slip on the thread or be dangerous in some way.

                        Comment


                        • #13

                          Re: lathe spindle repair options

                          Re: lathe spindle repair options

                          Originally posted by BRIEN View Post
                          not much of a wood lathe guy, but is there another smaller thread that is standard to the woodturning trade, that you could have the worn out thread turned down too. It would just have to be larger than the root of the 1" thread.
                          that could be done with say a 7/8 by 14 or 3/4 by 18?, the only problem is the reatiner nut sitting on the bed in the first photo, it holds the shaft in the bearings. of course a new one could be made too!!
                          my shop is a beaver lodge
                          steve, sarnia, ont

                          sigpic

                          1940's Beaver Jointer

                          Comment


                          • #14

                            Re: lathe spindle repair options

                            Re: lathe spindle repair options

                            Originally posted by Phred View Post
                            You are only showing the outboard thread and the other doesn't look that bad from the view shown. Why not put a faceplate on it and see what it will run like? It's not like it will slip on the thread or be dangerous in some way.
                            see my previous thread, re the retainer nut. a faceplate would be screwed on after that nut
                            my shop is a beaver lodge
                            steve, sarnia, ont

                            sigpic

                            1940's Beaver Jointer

                            Comment


                            • #15

                              Re: lathe spindle repair options

                              Re: lathe spindle repair options

                              Originally posted by Aylmer Tom View Post
                              This is a type of repair I do quite often on worn and broken shafts usually in gearboxes. Like Leo states there is going to be a problem with the MT. You'll need it done by some one with an MT2 reamer. If they have the reamer it is just as easy the build a new shaft. I don't have the reamer and that's why neither does the spindle in my 3400 lol. They are about $80. I should just get one I guess. I could turn that shaft out in about an hour if I had the reamer
                              The OP should buy it for you in exchange for a new shaft.

                              Just a thought?
                              Andrew

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