[How do I?] Which Lathe Setting for Finest Feed

ARM

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Hi Guys
Need courage to ask this. ( Obvious Answer to many) Has to be asked though, from what I am presently using as LCT1Z
What setting on my lathe would I use to achieve the slowest Finest Feed for Finish Turning.
Have attached a pic of the Face of the Lathe with the various Screw Settings
TIA
ATB and LORD Bless.017.JPG
aRM017.JPG
 
Sorry Guys.
Thought the pic would blow up to make the Screw Settings easily legible. Regret it's worse N U Guys won't be able read that at all. Unfortunately don't know which Size option to load ???
aRM
 
Okay, we got blown up pics of the Thread Charts. These will greatly assist. Here goes..........006.JPG007.JPG008.JPG
 
LCT1W looks like the finest to me - 2 thou (or 0.05mm) feed per revolution.
You may also have to do a change to the gear train to change between threading and cutting feeds (top left of the face plate). Can't quite make it out but that is what I have to do on my lathe - you used to have an ML7 as well didn't you?.
 
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It looks like your right chart in the first blowup picture is your feed chart.
LCT1W will give you .002"/rev.

It may be possible to get finer feeds by playing with the change gears I was able to get my G0602 down from .0025"/rev. to .0014"/rev. by changing one gear set fro 56/104 to 36/120.
 
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LCT1W looks like the finest to me - 2 thou (or 0.05mm) feed per revolution
Hello there Pete
Was worried U Guys would say that. Premonition of sorts as I tried earlier to engage those Gears. All meshed except the Long Numeral 1.
Will try again with the Jog Button. Hope it works !!!
Thanks a zillion. Know we are on right track now
LORD Bless
aRM
 
It looks like your right chart in the first blowup picture is your feed chart.
LCT1W will give you .002"/rev.

It may be possible to get finer feeds by playing with the change gears I was able to get my G0602 down from .0025"/rev. to .0014"/rev. by changing one gear set fro 56/104 to 36/120.
Hello RJ
Assume U also have a 14" lathe.
What U said concurs with Pete. Now we need to make these Gears mesh. Will give that another go.
Will also check the additional Gears which came with the Machine.
Much appreciate the quick response
LORD Bless
aRM
 
I have a 10 x 22 but the same principle applies. Smaller input and larger output gears equal finer feed. I am using my inch/metric transposing gear for the output gear.
 
This lathe appears identical to the Grizzly G0509G. The manual is attached, although they have an error on the metric feed rate (P31) which was corrected on your model gear plate. There are no additional change gears, just one transposing gear which is a 44/56T. They give directions in how to change Feed/Leadscrew gears and that the gearbox should be in neutral "I". If I have difficulty engaging a gear, sometimes I will engage the gearbox feed, spin the gears by bumping the jog (momentary) and then changing the gears before the machine stops. You can also rotate the chuck by hand with the gearbox feed engaged and jiggle the gears change lever to the desired setting. You seem to be having problems getting the gears to mesh in the desired feed rate. LCTW2W will give you a feed rate of 0.0022 which could also be used. If it is difficult to shift the gearbox there could be a shift rod or fork problem, might also benefit to change the gearbox oil if something is sticking.
 

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  • g0509g manual.pdf
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Hi Guys
Just to report back, tried all the Settings in the LCT1-8W designations. None of them meshed at all. It seems that we definitely need to change some Gears, if we can can trace specifically which. Any idea which would they be ??? I reckon that they just might be the lower small Ones. Will need get a shot of the innards of our Lathe.
Thanks again
aRM
 
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