Yes that youtube video seems to be very helpful. I've been watching it for the last few days.
Well we will give it a try then and see how it pans out. Thanks all On Wed, May 27, 2020 at 2:03 PM Leonardo Marsaglia <[email protected]> wrote: > I've never took apart the ones in the Mazak (Wich I asked for quotation > once)but I disassembled other lathes that were similar and it's not that > much of a pain. Surely you must make some tooling sometimes to get things > done right but nothing else. > > 5.000 to 7.000 sounds about what they would charge for it. From what I > remember the tricky part is to guarantee a free dust and grit assembly. > They claimed to have a dust controlled environment much like a > semiconductor factory but I suspect part of that is marketing. > > One common approach for big lathes is two double row roller bearings with a > thrust bearing for the axial load. > > Leonardo Marsaglia > > El mié., 27 may. 2020 14:51, Jon Elson <[email protected]> escribió: > > > On 05/27/2020 12:18 PM, Curtis Dutton wrote: > > > So after finishing the retrofit of the old Miyano gang lathe the > spindle > > > bearings are shot. You can grab the spindle nose and push it side to > side > > > about .0005" to .001". The cut quality is also fairly bad. Just > cutting a > > > spring pass on an aluminum bar shows a lot of chatter like marks. > > > > > > I can also measure a .0005" to .001" axial play by pushing on the face > > or > > > the collet closer of the spindle. Not to mention there is roughness and > > > fairly loud bearing noise while running. > > > > > > I expected this but I'm looking for someone that can refurbish it or > any > > > advice from others that have done this before. I haven't ever sent > > anything > > > out to be rebuilt so I'm ignorant on the process. > > > One online quote I received was 4500 to 6500. Is that reasonable? Does > > > anyone know of someone or have pointers? I'm not opposed to trying to > do > > it > > > myself but I know it would be very challenging to get it right. I'm > sure > > > I'd need to order 2 sets of bearings... One for the first attempt and > one > > > to get it right! > > > > > Well, it may not be that tricky. It is probably just a pair > > of angular contact precision ball bearings, > > and may have some type of spacer to get the preload right. > > Do you have any drawings of the > > headstock? That might give some idea of how the spindle is > > assembled. > > > > Jon > > > > > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
