Myford saddle

Myford saddle

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  • #100182
    Kevin F
    Participant
      @kevinf

      Hi all, I'm a newbie too the forum , I've recently purchased a Myford ml 4 , I have a few queries that I hope you chaps can help me with.

      Firstly when turning the handle on the saddle ,it moves a large amount with very little input ,it's difficult to explain its not back lash, its the distance the saddle moves to one revolution of the handle ,I'd like to have a better ' feel ' when doing precise work ,I'd prefer to work the saddle instead of the compound slide.

      sorry for the poor explanation but its difficult to put into words, my second question is, will a screw cutting gearbox of a Myford ml7 fit the ml4 ?

      Thanks in advance Kev

      #22249
      Kevin F
      Participant
        @kevinf
        #100307
        pierre ehly 2
        Participant
          @pierreehly2

          hi kevin,

          Have a look here: (ML7 apron IPC, similar to ML4)

          http://www.myford.co.uk/acatalog/Myford_ML7_Apron_Assembly.html

          The play is the play from the gears & rack assy, for precise move, use

          top slide or lead screw & graduated hand wheel.

          No idea for the gearbox installation (depend on your skill)

          Hemingway kit is selling plans & kit for a ML7/S7/ML10 Gbx,

          this plans contain certainly installation instructions

          pierre

          (owner of ML7 sn K37512)

          #100310
          KWIL
          Participant
            @kwil

            ML7 gearbox unsuitable for the ML4, the use of the saddle is possible but limited without an accurate measuring system or leadscrew dial.

            #100311
            David Littlewood
            Participant
              @davidlittlewood51847

              Kevin,

              I agree with you that it is better not to rely on the saddle handwheel for applying accurate feeds; it is just too coarse. I also avoid using the topslide for parallel turning where possible; it is much too restricting to have to keep it parallel to the bed at all times. The best solution is to use power feed where possible, and where you need precise controllability a graduated handwheel on the leadscrew is ideal (see the one on the Super 7). I'm not sure whether it is feasible to put one on an ML4 as I've never seen one close-up.

              If it isn't possible, then consider fitting a DRO to that axis, then the coarseness of feel of the saddle handwheel may become easier to live with.

              David

              Edited By David Littlewood on 08/10/2012 11:46:06

              #100312
              Ady1
              Participant
                @ady1

                An ML4 is an entry level unit not worth any serious upgrading work

                Good enough to learn on though, and you can fix any wobbly bits

                After a year or two if you get serious you'll realise this

                Spareys book is the bible for newbies, all newcomers should get this book

                **LINK**

                #100314
                Ady1
                Participant
                  @ady1

                  There are a number of modifications which should be made (mods)

                  A leadscew handle would be my first one

                  **LINK**

                  gl

                  #100343
                  NJH
                  Participant
                    @njh

                    Hi Kevin

                    I've had an ML4 and ML S7. I doubt that any parts are interchangeable. For a start the sides of the bed for the ML4 are trangular and the bed width is less than the 7 hence there is no chance of the saddle parts being interchangeable, The leadscrew handwheel is the way for a fine feed. I see from Ady's pic that he has one fitted. There wasn't one with mine but there was a nut on the RH end of the leadscrew which I was able to replace with a piece of tapped rod on which to mount a handwheel. I remember leaving the gear off the other end of the lead screw to enable use of the handwheel. I don't think the idea of adapting a 7 gearbox is worth considering and I doubt anyway that it could be made to fit.. The cost of even a S/H gearbox  from a scrap machine via ebay is likely to be more than a small, brand new, eastern manufactured lathe.

                    Set up the handwheel as mentioned and enjoy learning to use your machine. You will learn a lot and, if you are carefull with it, in time if you have ambitions to trade up, you will be able to sell it again to help fund your next lathe.

                    * I seem to remember that the saddle traverse pinion operated directly on the rack hence the handwheel had to be turned in the opposite direction to normal – am I remembering correctly?

                    Regards

                     

                    Norman

                    Edited By NJH on 08/10/2012 18:55:45

                    Edited By NJH on 08/10/2012 18:59:24

                    #100347
                    Kevin F
                    Participant
                      @kevinf
                      Hi ,thank you for all your helpful replies , Ady1 I was considering mounting a lead screw handle and I was also thinking along the same lines as you in regards to changing the handle on the cross slide ,I think these will be first on my too do list .if you do have any other useful mods I'd be gratefull to hear them.
                       
                      it's a shame that I can't retro fit a screw cutting gearbox to the ml4 ,as I intend to cut a variety of threads and I was looking for ease of use ,instead of changing the gear combinations.
                       
                      I do have some queries about screw cutting ,I could do with some help in understanding which is the first stud ect
                       
                      Number 1 is the mandrel,

                      number 2 is the tumbler rreverse

                      number 3,4 ?

                      the lead screw is easy enought to work out, thanks Kev

                      Edited By Kevin Fenrich on 08/10/2012 19:28:19

                      Edited By Kevin Fenrich on 08/10/2012 19:28:52

                      Edited By Kevin Fenrich on 08/10/2012 19:29:21

                      #100348
                      Kevin F
                      Participant
                        @kevinf

                        * I seem to remember that the saddle traverse pinion operated directly on the rack hence the handwheel had to be turned in the opposite direction to normal – am I remembering correctly?

                         

                         

                        Thanks Norman, yep that's correct and a bit annoying as its the opposite to what I'm used too, non the end of the rack there is a short stubby handle it looks like the lead screw has been drilled and tapped, when I turn it I can hear the lead screw gear revolve but the saddle doesn't move ?

                         

                        Edited By Kevin Fenrich on 08/10/2012 19:33:43

                        #100349
                        NJH
                        Participant
                          @njh

                          Hi Kevin

                          At the risk of stating the obvious you are engaging the half nuts aren't you?

                          N

                          #100357
                          Kevin F
                          Participant
                            @kevinf
                            Posted by NJH on 08/10/2012 19:57:24:

                            Hi Kevin

                            At the risk of stating the obvious you are engaging the half nuts aren't you?

                            N

                            Mmm yes I think your right, you can tell I'm new to the Myford lathe

                            #100789
                            Kevin F
                            Participant
                              @kevinf

                              Thanks for everyone whm has replied on the thread, I bought a hand wheel from rdg tools and modified it to fit ,I've also made a drip / swarf tray for when I get a coolant system .

                              Here's some pics

                              I made a small bush ,with an internal thread to screw onto the lead screw and also incorporated a lock nut on the lead screw

                               

                              [IMG]http://i99.photobucket.com/albums/l313/kevfenrich/af562311534ba881c60e653d83289936.jpg[/IMG]

                               

                              Another angle

                               

                              http://i99.photobucket.com/albums/l313/kevfenrich/d67db0a6a2b5722390cbbd9baddee49d.jpg

                              Tthe lathe as it stands

                               

                              http://i99.photobucket.com/albums/l313/kevfenrich/1a20cee56322653cbc38faf7685fe80b.jpg

                               

                              im still struggling to fathom out the screw cutting gears

                              Edited By Kevin Fenrich on 14/10/2012 14:57:24

                              #100811
                              pierre ehly 2
                              Participant
                                @pierreehly2

                                Kevin,

                                http://www.usinages.com/manuels-documentations-machines-outils-disponibles/index-des-documentations-machines-outils-accessoires-t25730.html

                                Scroll down to "Myford" then dowload :

                                1 _" Myford pignonnerie" an explanation of change gears for Series 7 lathes + ML10

                                2_"Myford ML4 manual" a succint manual for the ML4 with a threading chart a the end

                                For the set-up remove all gears, then start from the lead-screw, inserting a strip of copy

                                paper between the gear teeth (remove prior use).

                                brgds

                                pierre

                                #100817
                                Kevin F
                                Participant
                                  @kevinf

                                  Thanks for the reply Pierre , I have the Myford ml4 manual ,the forum you've linked above wont let me down load the info as I'm not a member

                                  Edited By Kevin Fenrich on 14/10/2012 19:07:00

                                  #314745
                                  Jon Cameron
                                  Participant
                                    @joncameron26580

                                    Sorry for resurecting an old thread. Which would be the best handles to use on the ML4. I’ve just bought the same lathe.

                                    Are RDG still a good supplier for a suitable handle? I can confirm that disengagine the gears from the spindle, small nut to adjust. And engaging handle, on the left of the apron allows the saddle to be traversed with a lot more dexterity. The rack handle for the saddle is something I want to address but I’m still trying to figure it out, there isn’t enough room to turn the rack the other way around, which would give an intuative feed from the saddle.

                                    #314807
                                    Hopper
                                    Participant
                                      @hopper

                                      Yes, RDG sell the leadscrew handles. YOu can also get them secondhand on eBay. Make sure you get the imperial handle with 125 graduations to match your 8tpi leadscrew where one turn equals one eighth of an inch travel. Dont get the leadscrew handle with 160 graduations as its for metric.

                                      It is possible to add an extra gear between the handle and the pinion that engages the rack, if you make up the brackets and get the right gears etc. Quite a bit of work. Geoff Walker did an article in MEW magazine in the past year or so on how to do this on a Drummond M Type lathe which is quite similar.

                                      #314809
                                      Jon Cameron
                                      Participant
                                        @joncameron26580

                                        Thank you Hopper, I’ll look into that

                                        #314849
                                        NJH
                                        Participant
                                          @njh

                                          Jon

                                          I "lived" with the saddle traverse handle of my ML4 moving the carriage the opposite way to that expected on other lathes. In the end I looked upon it as a "little quirk" of an old lady and forgave "Millie the Myford" her little excentricities ! You will quickly learn to turn it in the right direction – just be really careful if you are close to the chuck!

                                          Norman

                                          #314865
                                          Jon Cameron
                                          Participant
                                            @joncameron26580

                                            Thank you Norman,

                                            Like I said at the worst I can use a handle on the lead screw, if it really starts to annoy me smiley

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