MT2 drill press chuck vs lathe tailstock chuck

[verbotenwhisky]

Here's a photo of one from Precision Matthews. They sell for lathe tailstocks. I was going to buy for my drill press.

I called and asked if it can be used in my drill press. They indicated that there was a difference and recommended that I don't use in my drill press. I did not comprehend what they were trying to communicate to me as to why they don't recommend using in a drill press.

View attachment 475788

That would actually work as shown in the picture, the flattened tang at its end is for that application to resist twisting in the taper...

 

[David2011]

In some tailstocks the tang can limit the travel. I knew that an arbor without the tang would eject from my tailstock. When I got a new chuck and arbor I cut the tang off to gain some travel. When the travel is only theoretically 2-5/8”and in reality even less, the 5/8” or so gained by losing the tang is a big deal.

 

[G-ManBart]

In some tailstocks the tang can limit the travel. I knew that an arbor without the tang would eject from my tailstock. When I got a new chuck and arbor I cut the tang off to gain some travel. When the travel is only theoretically 2-5/8”and in reality even less, the 5/8” or so gained by losing the tang is a big deal.

It isn't always that way. I've got multiple MT3 drill chucks, live centers and dead centers. Some without a tang will eject, and some won't...there isn't a set length that's standard so it can go either way on any particular lathe.

I'm only saying that so someone doesn't read it and think "it doesn't have a tang, so it will eject from my tailstock" like it's always the case. It seems to be actually pretty common that people run into situations where they won't eject.

 

[David2011]

Thanks for clarifying what I was trying to say. Looking back I see that I implied that I had tried it but I didn't explicitly say so. Yes, don't go hacking the tang off if you don't already KNOW that it will eject/release without it. Recently I got another lathe that has a 4" travel on the tailstock (Heaven!) and all of the tailstock accessories need a tang to remove them. Just went to the shop and checked; the tailstock barrel is machined to use the tang as a drive tang. That sure makes it easier to not have the chuck spin when making large holes. Fortunately, with a tang tools will self eject without needing a wedge.

 

[Smithdoor]

This is probably a silly question...

Some mt2 chucks are labeled as lathe tailstock chucks and others indicate that use is for a drill press.

If a chuck is made with a MT2 taper, why would it not work in both my South Bend tailstock as well as in my drill press...both accept MT2?

Is there a "drill press" MT2 and then a different "lathe tailstock" MT2?

Thanks

No tang need for the tail stock.
There is also milling with a draw bar threads.
For mini lathe stub type too.

Dave