On Mon, 04 Dec 2017 16:17:44 -0800, wrote:

On Mon, 04 Dec 2017 14:30:13 -0500, Ed Huntress
wrote:

On Mon, 4 Dec 2017 11:28:22 -0800 (PST), "
wrote:

On Monday, December 4, 2017 at 7:18:13 AM UTC-5, Jim Wilkins wrote:
if it's an AA/Sears 109-21270 your next problem will be spindle
deflection.
http://www.lathes.co.uk/craftsman/page5.html

If it is an AA Sears lathe , the first problem was spindle deflection.

Dan

And the second problem was spindle bending, right at the bottom of the
nose-thread relief.
Good thing it wasn't THAT Sears lathe. It's the Atlas made version.
The 101.07301 In any case I have made a new spindle. The new spindle
allows use of a Royal 3C spindle nose insert and 3C collets. I swapped
the original plain bearing headstock for the Timken tapered roller
bearing type. I still have lots more to do. I have yet to mill the
underside of the ways so that the ways become a dovetail way like
Hardinge uses. Before I do that I need to figure out how I am going to
modify the carriage so that it will work with a dovetail way.
Eric

Wow. This is going to be a Whidbey lathe when you're done. d8-)

--
Ed Huntress