- Joined
- Jan 28, 2019
- Messages
- 62
My New To Me lathe (SB 1952 9" C) came with change gears but the gear train was not set up as the feed and thread chart showed. I’ve sourced one compound gear and will use it for the initial arrangement. In trying to figure this out I have a few questions, any help, comments are appreciated.
First to put some of this in perspective I don’t turn threads. Haven’t with my toy Atlas 6” Mk2 for 40 years and have no plans to do so in the future (but you never know). My use of the feed screw is for general material removal and having a nice finish when done.
Is there a list of the OEM change gear “set” when these lathes were sold new? A list of the range of tooth count made?
Then there’s the various positions the gears have. Feed screw end, banjo or tumbler. Why would one want a bigger feed screw gear VS a smaller one if the feed rate could be otherwise be the same?
I’ve read that a C version came with a 56/18 compound gear and the B came with a 72/18 one. Reasons other to effect the feed rate?
I’m trying to both understand best set up for a feed rate and explore what OEM and future threading options I might have. I suspect I will want to get a handful more gears as I learn more. Andy
First to put some of this in perspective I don’t turn threads. Haven’t with my toy Atlas 6” Mk2 for 40 years and have no plans to do so in the future (but you never know). My use of the feed screw is for general material removal and having a nice finish when done.
Is there a list of the OEM change gear “set” when these lathes were sold new? A list of the range of tooth count made?
Then there’s the various positions the gears have. Feed screw end, banjo or tumbler. Why would one want a bigger feed screw gear VS a smaller one if the feed rate could be otherwise be the same?
I’ve read that a C version came with a 56/18 compound gear and the B came with a 72/18 one. Reasons other to effect the feed rate?
I’m trying to both understand best set up for a feed rate and explore what OEM and future threading options I might have. I suspect I will want to get a handful more gears as I learn more. Andy