Re: screw cutting atlas 10 F
- --- In firstname.lastname@example.org, "Wally G." <dgehricke@...> wrote:
>holding devise, thus far I
> --- In email@example.com, Jon Elson <elson@> wrote:
> > Wally G. wrote:
> > >Hi all,
> > > I have been trying to cut some very simple 1 1/2 X 8" work
> havestart the cut with the tool
> > >used 2 gear train set ups on my lathe. The problem is when I
> > >advanced about .005-.008 the lathe spindle locks up when I shutdown the machine
> andup. I have cut other pitch
> > >back ouyt the cutting tool it is the gear train that is locked
> screwsand it only has screw
> > >before with out a problem. I have checked my Atlas lathe manual
> > >cutting diagrams for the 6" and 12 " lathe the 10F is different,I have also conculted
> the screwwhy is the #2 diagram
> > >cutting diagram inside my end cover and this is also confusing
> and thelegend.
> > >actual #8 info different? Different gears are called for in the
> > >Any info or any help at this point would be greatly appricated.locked with an
> > >P.S. these gears in the train also loosen up when running unless
> additional(8 TPI
> > >lock nut on the gears between the screw and the A position.
> > >
> > >
> > >
> > The correct gear ratio is 1:1 for 8 TPI. You want the leadscrew
> > itself) to make exactly onecauses a
> > revolution for each spindle revolution. This coarse a thread
> > lot of force on the gearforce
> > train, and may be distorting the gear mounting bracket. This may
> > the gears against thesee you
> > nuts and start unscrewing them. With a worn set of gears, I can
> > running into problems.teeth
> > Advancing the tool 5 to 8 thousandths may just be too much on a 10"
> > Atlas, anyway.
> > Since most of the gears here will be idlers anyway, the exact # of
> > doesn't matter.bushings, but
> > You have a choice of a 16 or 32 tooth gear on the spindle. Put a
> > 32-tooth on the leadscrew
> > shaft, and select the 32-tooth on the spindle. Then, select your
> > best-looking gears for
> > idlers, and put enough of them on the bracket to span the distance
> > between the drive gear
> > and the leadscrew gear.
> > Note that the gear nuts are supposed to clamp down on the
> > allow the gearstart to
> > spacers to turn freely. If the bushings are worn, the nuts may
> > clamp down on theI'll let you know how I
> > spacers, causing all sorts of trouble. You can usually turn down the
> > spacers a few thousandths
> > to give clearance. You might check for this sort of trouble on your
> > machine.
> > Jon
> Thanks for the heads up and the info , I'll give it a try today and
> make out.Jon,
> Thanks again
> Wally G
You were on the money, I found one of the bushings worn on the inside
so bad I started to make an insert for it. I did check the gear train
completely and all the gears are good but the main culprit seems to
have been the bushing and some type of lubrication or the lack there
of on the inside of the bushing,this also seems to have caused an
excessive amount of ware making the problem worse.
Thanks again for the push in the right direction.