Improved performance over standard V belts?

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Improved performance over standard V belts?

Home Forums Beginners questions Improved performance over standard V belts?

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  • #516515
    pgrbff
    Participant
      @pgrbff

      I have read on more than one occasion that the type of drive belt shown above can reduce transmitted vibration and offer improved performance.

      Could this be true?

      I have to replace two 1300mm belts and was considering trying to source some.

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      #10605
      pgrbff
      Participant
        @pgrbff
        #516516
        Grindstone Cowboy
        Participant
          @grindstonecowboy

          I've heard this too, but my personal preference is to avoid them unless absolutely necessary e.g. on an underdrive Boxford, as they seem noisier than the traditional type.

          Rob

          Edit – and they are considerably more expensive than the ordinary ones.

          Edited By Grindstone Cowboy on 31/12/2020 16:58:55

          #516517
          wheeltapper
          Participant
            @wheeltapper

            I think the only real advantage is, you don't have to take the lathe apart to replace them.

            #516518
            noel shelley
            Participant
              @noelshelley55608

              There is little to recomend link belt other than it can be easy to fit ! They tend to strech more than a normal V belt are noisy and can introduce vibration. Noel.

              #516519
              JasonB
              Moderator
                @jasonb

                Probably less vibration than a rivited type but not as little as a solid Vee belt

                #516522
                pgrbff
                Participant
                  @pgrbff
                  Posted by noel shelley on 31/12/2020 17:06:49:

                  There is little to recomend link belt other than it can be easy to fit ! They tend to strech more than a normal V belt are noisy and can introduce vibration. Noel.

                  The manufacturers claim the opposite. Stretches 0.5 to 1% and reduces vibration.

                  Maybe that is the only way they can sell a product that maybe has a "temp. fix" feeling about it.

                   

                  Edited By pgrbff on 31/12/2020 17:25:17

                  #516527
                  Tricky
                  Participant
                    @tricky

                    As someone who has actually used one I found on my Myford S7 that the vibration on the original belt from motor to countershaft made it almost unusable in high speed but replacing the belt with a Powertwist belt reduced the vibration considerably.

                    #516528
                    Tony Pratt 1
                    Participant
                      @tonypratt1
                      Posted by Tricky on 31/12/2020 17:39:22:

                      As someone who has actually used one I found on my Myford S7 that the vibration on the original belt from motor to countershaft made it almost unusable in high speed but replacing the belt with a Powertwist belt reduced the vibration considerably.

                      Thats the end of that argument then!wink

                      Tony

                      #516532
                      Michael Gilligan
                      Participant
                        @michaelgilligan61133

                        I think the variable results/claim/opinions probably come from the fact that some standard vee belts harden with age, and take a ‘set’ when they are left for a while, in tension.

                        A dramatic improvement can then be seen by changing to any decent belt.

                        MichaelG.

                        .

                        P.S. __ Here is Fenner’s claim: 

                        https://www.fennerdrives.com/product-lines/hpc-v-belts/

                        Edited By Michael Gilligan on 31/12/2020 17:58:24

                        #516533
                        Howard Lewis
                        Participant
                          @howardlewis46836

                          Only time that I have used one was a "plastic" like that shown, to replace a Vee belt about to fail on a ML4.

                          No noise or vibration as far as I could detect, and far better than the old one on its death bed.

                          The motor was a 3,000 rpm one, too!

                          Howard.

                          Edited By Howard Lewis on 31/12/2020 17:54:42

                          #516545
                          not done it yet
                          Participant
                            @notdoneityet

                            Probably less vibration than a rivited type but not as little as a solid Vee belt.

                            Agree with first point, but if this is a twin belt installation (as opposed to single belts) I would possibly expect less vibration, so likely a good choice in those circumstances.

                            #516548
                            Niels Abildgaard
                            Participant
                              @nielsabildgaard33719

                              Compare here

                              Standard V-belt

                              Powertwist

                              Edited By Niels Abildgaard on 31/12/2020 19:03:57

                              #516551
                              old mart
                              Participant
                                @oldmart

                                They are popular with Myford users and anyone who doesn't want to remove the spindle from a belt drive lathe. The Smart & Brown model A with a 1 1/2hp motor has a 1/2", 13mm wide linked belt from the motor to the gearbox as standard. I fitted a rivetted belt of 10mm width to the Tom Senior light vertical with the R8 spindle and 1hp motor. Unfortunately, the washers on the rivets started to come in contact with the narrow part of the pulley vees, and not only caused noise but also localised wear. I had to get a conventional vee belt.

                                #516552
                                Joe McKean
                                Participant
                                  @joemckean81940

                                  I replaced the original belt on my Boxford AUD with a Fenner Nu T Link V belt two weeks ago and yes it has stretched slightly but this is easily sorted by taking out one link, a ten minute job.

                                  It was expensive at just under £60 for two metres but on the plus side was a doddle to fit and the machine now runs far more smoothly with less noise and the vibration has also reduced so all in all I am happy with my purchase.

                                  Will it last as long as the original, only time will tell.

                                  Joe

                                  #516567
                                  Simon Collier
                                  Participant
                                    @simoncollier74340

                                    I wish I had fitted one to my Hercus when a new belt was needed. It would have saved two weeks of difficult, aggravating, stressful work, and a new pair of tapered roller bearings as I damaged the originals because of my inexperience.

                                    #516574
                                    AJAX
                                    Participant
                                      @ajax
                                      Posted by pgrbff on 31/12/2020 16:52:02:

                                      I have read on more than one occasion that the type of drive belt shown above can reduce transmitted vibration and offer improved performance.

                                      Could this be true?

                                      I have to replace two 1300mm belts and was considering trying to source some.

                                      I fitted one to my denford lathe for the same reason it has been mentioned it is easier to fit to a boxford. It is easy to fit.

                                      It has worked fine. Not stretched. About average noise.

                                      Due to price I would not fit one unless I had to. Vee belts work just fine for me.

                                      #516578
                                      Harry Wilkes
                                      Participant
                                        @harrywilkes58467
                                        Posted by Tricky on 31/12/2020 17:39:22:

                                        As someone who has actually used one I found on my Myford S7 that the vibration on the original belt from motor to countershaft made it almost unusable in high speed but replacing the belt with a Powertwist belt reduced the vibration considerably.

                                        Agreed found the same with my S7

                                        H

                                        #516580
                                        John Haine
                                        Participant
                                          @johnhaine32865

                                          I use one on the modified drive for my VMB where I've eliminated the central pulley and fitted a VFD. Also replaced the drive belt to the spindle on my S7. I think they are very good. I'd like to do something to improve the motor/countershaft drive on the 7 too but that uses poly vee on the big bore version.

                                          #516592
                                          bernard towers
                                          Participant
                                            @bernardtowers37738

                                            I have had a nut t link belt on my S7 for nearly 20 years with no trouble or vibration which is more than can be said for a std v belt which if left for a short time gets a set in it which gives you the vibrations.

                                            #516613
                                            Michael Gilligan
                                            Participant
                                              @michaelgilligan61133
                                              Posted by John Haine on 31/12/2020 21:31:52:

                                              […]

                                              I'd like to do something to improve the motor/countershaft drive on the 7 too but that uses poly vee on the big bore version.

                                              .

                                              I can’t really think of any alternative that would be an improvement on a suitably proportioned poly vee

                                              … it’s the optimum design for a drive belt, in my opinion.

                                              MichaelG.

                                              #516623
                                              Sandgrounder
                                              Participant
                                                @sandgrounder

                                                I've used the plastic type shown by the OP on my S7 and the only fault I could see is that it requres a higher belt tension to prevent slipping, I've now replaced it with the original type of Brammer link belting made of rubber and canvas and I think it's better, I will add that this is just how it seems to be and I've not done any tests at all.

                                                John

                                                #516626
                                                Kiwi Bloke
                                                Participant
                                                  @kiwibloke62605

                                                  I'm another satisfied user of the Nu T belt – on the primary drive on my Super 7. These belts do stretch until they stabilize, but, as has been said, removing a link is easy and quick. I don't think it's been mentioned that they are supposed to run only in one direction, but, in practice, reverse running is OK. They are noisier than a sweet-running V belt, but don't seem to have the problem that some V belt drives can have, when a too-slack, vibrating belt is tightened, only to 'drum' annoyingly and incurably. This is said to be because of the link belt's higher internal damping characteristics. One might therefore expect a link belt to run hotter than a V belt, but, perhaps because of its greater flexibility (than some types of V belt), this doesn't seem to be a problem in practice. And they don't seem to degrade. I don't know whether they wear alloy pulleys more than conventional V belts though.

                                                  The rivetted Brammer belt is perhaps best regarded as obsolete. I have a sneaky suspicion that the rivet-contacting-pulley problem is because the wrong section belt is sometimes sold.

                                                  #516784
                                                  pgrbff
                                                  Participant
                                                    @pgrbff

                                                    If I decide to stay with V belts is how do I choose a good one?

                                                    #516787
                                                    Steviegtr
                                                    Participant
                                                      @steviegtr

                                                      Try these guys.

                                                      The bearing shop

                                                      Steve

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