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need help on thread/gear change settings.
#1
[attachment=15884][attachment=15885]Ok, please bear with me.
Bought a Chinese lathe from the bay! Rotfl
It's not too bad me thinks, and after some messing about by me I can get it to turn steel 350mm long down to less than 1/2 a thou...…….. over said length, to say I'm pleased is the understatement of the year! (think canine with two willies!!!) Smiley-signs107
My problem is I never got a manual with feed rates etc from the company I bought it from!
So if I can supply the gears, can anyone supply the feed rate gear settings?
I emailed the company I purchased the lathe from about feed rates, and got told "bigger gears mean smaller feeds"...…..Yeah, right f-in really helpful!!!
It's a lot to ask, but, if you don't ask, you don't get!

So.…..Headstock gear is fixed 56T,  then looking at pic, A/B C/D (E/F leadscrew)
I have 84T, 80T(x3), 72T, 60T, 52T, 50T, 40T, 33T, 20T gears.
Leadscrew is 16mm x 2mm pitch.

Seriously, any help will be mega helpful! 

Pic included if that helps any?
(1st pic needs rotating right by 90 deg.)

In the first picture gears are...…………56T headstock, (A)80/(B)33T,  (C.)20/(D)80T, 84T leadscrew....feedrate is not known to me!  Bash

Cheers in advance peeps!

Roy.
Light travels faster than sound!
This is why some people appear bright until they open their mouth!
Preserve nature...…….Pickle a squirrel! 
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need help on thread/gear change settings. - by Swarf_Newbie - 10-03-2018, 05:46 PM



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