Lathe gears

A

AngeloConti

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I am trying to set up both a lead screw and screw cutting set of gears on my recently bought New Granville lathe

It came with a box of gears but I cannot see any way of locking them up on a couple of the shafts so the drive the next gear.

I have just thrown a set on (sorry for technical terms ) to get an idea of what's needed - the gears have key ways but the shafts don't.

Any tips or advice appreciated - I am new to screw cutting - my previous lathe was a very small Unimat 4 clone which was simpler but limited.
 

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Looks like you have a "Junior" made around 1954
The data plate on the headstock might be a thread chart

Page Title

Granville & Corbett Lathes<br>F.Cole lathes<br>Little Jim lathe<br>Xl & Junior Lathes<br>Granville Star Lathe
www.lathes.co.uk

Be careful about placing tools and drills on a magnetic strip-
When they start attracting a lot of steel chips/swarf you might have a big problem
 
Last edited:
markba633csi said:
Looks like you have a "Junior" made around 1954
The data plate on the headstock might be a thread chart

Page Title

Granville & Corbett Lathes<br>F.Cole lathes<br>Little Jim lathe<br>Xl & Junior Lathes<br>Granville Star Lathe
www.lathes.co.uk

Be careful about placing tools and drills on a magnetic strip-
When they start attracting a lot of steel chips/swarf you might have a big problem
Click to expand...
Good point - didn't think about that
 
OTmachine said:
Should be a keyed bushing for 2 gear stack below the reversing gears and a keyed lead screw. The other gears just go on studs acting as idlers.
Click to expand...
That's the issue - I have neither so need to make up something
 
Here is what it looks like without gears
 

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Should be set up like this picture. Looks like the lead screw gears were secured with a set screw, no key on yours.
 

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Yes I can see I need to find a way around my problem - I notice some gears have a small pin on them that will location a corresponding hole in others this may be the way they are meant to lock up to make a cluster gear. I have locking rings - I will have another go next week - will have more time then. Thanks
 
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