Atlas 10100 lathe question

[Vancetp]

Hi all,
I am used to threading upside down and backwards on my Grizzly lathe. This works great for me, especially with inside threads.
I recently got an old 10100 Atlas 6 x 18 lathe which has a threaded spindle. This makes cutting in reverse unwise, due to the possibility of the chuck spinning off.
I'd like to somehow firmly attach an adapter plate to the spindle. I've thought of tack welding or red locktite. Chucks with bolts through the face can be changed without removing the adapter so different types of chucks can be used if I can find them. I have one 3" 3 jaw chuck like that, but no others.
I'd rather do something like a setscrew, pin, or ?? that can allow the plate to be removed so I can use the chucks that I already have.
Any ideas?
Thanks,
Phil

 

[mickri]

Welcome to the forum. This is currently being discussed in this thread.

[How-To] - Running a threaded spindle in reverse?

I just acquired my first lathe (SouthBend heavy 10L) that has a threaded spindle to attach the chuck and other equipment. I have heard never to try using this lathe in reverse as this will unthread the chuck. Is there a safe way to use this machine in reverse?

www.hobby-machinist.com

 

[Nutfarmer]

Please don’t red lock tite or weld the chuck. You want to be able to change out the chuck to a four jaw or maybe a face plate. There are ways to accomplish this with out going to extremes. mickri post indicated a good place to start. Search the posts here. There have been some good suggestions.

 

[markba633csi]

What about a drawbar?

 

[Vancetp]

Thanks for the suggestions. The bar keeper looks like a decent solution, but limits the length of the stock. That isn't a deal breaker, since most of the parts I'm making are small.
I'm considering a pin that goes through the spindle and the base of the adapter.

 

[Choiliefan]

If you have the room, machine and slot the back of your faceplate or chuck and make a locking ring, like this:


These are examples from a couple sources.

Another way is to drill and tap a hole with a brass or copper slug to bear-down on a small area of the spindle thread.