Help with South Bend lathe please…

[JP SantosParticipant @jpsantos46123]

thanks for that info, been reading a bit more and looks like the guy I emailed yesterday was right mentioning that I needed a 80t idle gear and he has one for £18….

looking at the screw cutting chart, and bear in mind im only interested in the longitudinal power feed, I do need that 80t gear.

I can set it up as shown on FIG1… or even FIG2.
That 80t gear is always present on both setups, then I can put the other gears as I have those.

 

And here's some very useful bit of information (added in case someone ends here with the same questions as myself)

There should be a total of 17 gears – 14 of these have the 9/16" keyed bore.
The tooth counts are 16, 24, 32 (quantity of 2), 36, 40, 44, 46, 48, 52, 54, 56, 60, and 80.

The remaining three have the 5/8" bore, no key.
The tooth counts are 80, 72/18 and 54/18, the latter two known as compound gears.

The three smooth bored gears can only be used as idlers, of course.

In addition to the square head bolt/sleeve/nut that you're missing, there is also a spacer with 9/16" keyed bore that moves the screw gear to the left, allowing mesh with the idlers for reduction.

 

 

Edited By JP Santos on 12/02/2015 16:16:56

[Chandler WelfordParticipant @chandlerwelford54307]

Try this guy in the US

http://plazamachinery.com

http://plazamachinery.com/files/Metal-10-11-2015.pdf

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