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  • #173430
    kevin large
    Participant
      @kevinlarge76611

      hi all I have bought my first lathe all I know is its a union lathe quite basic I think it does not have a power feed my question is the leather belt slips and seems a bit loose I cant see any way of tightening it it does have a metal clip joiner should I cut it a bit and make it tighter if so how tight ?

      also an old fellow told me they used to paint the belts with something in the old days to stop them sliping but didn't remember what it was called.

      any help appreciated

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      #7411
      kevin large
      Participant
        @kevinlarge76611
        #173441
        UJ Newton
        Participant
          @ujnewton33659

          I sure you will get enough info from people on the forum but there is a first rate book abouts belts and belting by Stationary Engine Magazine..

          #173446
          Bazyle
          Participant
            @bazyle

            have you seen this site Check the belt isn't covered with oil. It may need cleaning, drying. The old fellow was referring to 'belt dressing' but not sure if it is still around. The modern stuff is probably for car fan belts, not leather.

            Google 'lathe belt dressing'

            #173451
            Nobby
            Participant
              @nobby

              Hi Kevin
              Its called belt stick I dont know who made it
              Nobby

              #173453
              UJ Newton
              Participant
                @ujnewton33659

                2parts lard 1part cod liver oil..you need proper raw lard not the stuff wrapped in packs..See Practical machinist forum..
                Could try canvas belt..still buy it

                #173454
                UJ Newton
                Participant
                  @ujnewton33659

                  phone up a museum which has belt driven machines and ask..I m trying to be a volunteer at Stretham Old Engine but I think they are all on holiday at the moment..Cambridge Museum of Technology might be easier

                  #173465
                  Nicholas Farr
                  Participant
                    @nicholasfarr14254

                    Hi Kevin, you may wish to consider this **LINK** I have no connection with this company, but have used some of thier products, including belt spray.

                    Regards Nick.

                    #173466
                    Roger Provins 2
                    Participant
                      @rogerprovins2

                      If you're anywhere near Gloucester I've a can of Rocol you can try out.

                      Roger

                      #173467
                      Paul Lousick
                      Participant
                        @paullousick59116

                        Hi Kevin, I am surprised that there is no way of adjusting the belt tension. There is normally some way of moving the drive pulley or moving an idler pulley to tension the belt. My 1948 Southbend lathe has flat belts and a lever that moves the motor.

                        If you cut the belt you will probably need a new belt clip to match the one on the other end of the belt. (could be hard to find as they are not so common now). And if you replace the clips on both ends the belt could be too short.

                        I have bought a can of spray for car fan belts from a car accessory shop to prevent slippage of rubber belts. Should also work on leather.

                        Paul.

                        #173475
                        Brian Wood
                        Participant
                          @brianwood45127

                          Hello Kevin,

                          You are looking for 'belt stick', it is a black resin based material that is applied to the inside of the running belt where friction melts it and impregnates the belt. You get a satisfying sticky tearing noise as the belt runs off the slack side of the pulley. It comes in a paper wrapped stick about a foot long.

                          Try agricultural engineers for it, it used to be available in Yorkshire up to 20 years ago. Old traction engine owners are likely to know of it as well, the ones that demonstrate belt driven machinery at fairs.

                          http://www.lathes.co.uk is another possibility, they sell flat belt jointing.

                          Belt dressing is lanolin based and is used to soften old belting, it won't help at all in this case.

                          Regards

                          Brian

                          Edited By Brian Wood on 24/12/2014 10:01:48

                          #173476
                          kevin large
                          Participant
                            @kevinlarge76611

                            Thanks for all your comments I have ordered a new belt but will also try and shorten the leather one

                            #173479
                            Speedy Builder5
                            Participant
                              @speedybuilder5

                              Go to a good music shop and ask for a block of ROSIN as used on violin bows. We used to use it on dad's old flat belt lathe. I believe that Rosin is the hardened gum from pine trees. Perhaps bury it in your garden for 10,000 years then dig it up and call it amber.

                              BobH

                              #173494
                              Ian S C
                              Participant
                                @iansc

                                In agricultural use, it was common to use molasses(? spelling), only problem with that is mice, they eat the belt. There was a thread about this subject a few years back.

                                Ian S C

                                #173828
                                mechman48
                                Participant
                                  @mechman48

                                  I recall during my apprentice days we used to use stuff we called 'black fat' or 'clagum', came in a 25 litre drum, looked like thick black treacle, but was much denser than treacle (the black fat not the apprentice dont know. ) I guess it was more akin to the resin based material that Brian described, horrible stuff to get off your hands & had to use a stick to get it on, brushes wouldn't last two minutes.

                                  George

                                  #173831
                                  Matt D
                                  Participant
                                    @mattd

                                    I don't know if it was the best stuff but we used to put Stockholm tar on an elevator belt used for lifting bales in the 70's, it was probably pine oil. More recently on drive belts we used a spray tin of "Belt Dressing" which contained Rosin. I probably shouldn't mention it but on my Edgar 5 lathe I had a flat belt, the joint of which clicked and annoyed me so I replaced it with a cheap 40mm synchronous belt with the teeth facing out (bliss). To do this you will need some form of belt adjustment unless you are very lucky but the web is full of adverts for cheap toothed belts with quite a range of lengths. Unless such modern things offend it might be worth a look.

                                    Matt.

                                    #173861
                                    Ian S C
                                    Participant
                                      @iansc

                                      I'v seen car timing belts used inside out, and shortened by cutting a long chamfer, and gluing and stitching. A jocky pulley could be used instead, if of small diameter, a toothed pulley to match the belt, but if it were reasonably large a plane one would be ok.

                                      It is possible to get heat joined flat belt, it's best to give the belt supplier the size of the pulleys, and the distance apart of the shafts, they will make up the belt.  One place that will sort you out for this type of belt is

                                      http://www.lathes.co.uk

                                      Ian S C

                                       

                                       

                                       

                                      Edited By Ian S C on 29/12/2014 09:53:19

                                      #173862
                                      Gordon W
                                      Participant
                                        @gordonw

                                        I used to like the click of the belt joint, I miss it , odd isn't it. Flat toothed belts ( timing belts ) do make good drive belts, but no need to buy, go yo nearest garage and they should have lots off cam-belt replacement jobs.

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