Does anyone have a guess at what this live center is?

[Scorn64]

I bought this live center as a MT2. (Not related to my other post) When I received it it turned out to be MT3 (I think, about 22mm where it would chuck). I figured it was a cheap Chinese one when I bought it but the bearings are American. The only identifiable markings are “new departure 8502 made in USA” on the bearing. I can’t use it and I want to represent it honestly when I resale it. Does anyone have any idea what it is?

 

[markba633csi]

Must be old and probably pretty decent; New Departure departed many a year ago
-Mark

 

[682bear]

It may be a Morse taper 2-½... 22mm is small for a MT3...

If it a 2-½, you may have to find a buyer with a Hendey lathe...

-Bear

 

[Scorn64]

I’m probably measuring it at the wrong spot. (I’m a nube) It starts at about 20mm and ends at 24mm. All the documentation I’ve found on determining a tools Morse taper has been pretty vague. Lol They seem to worry more about length than diameter.

 

[682bear]

Ok, yes, that sounds like a MT3...

-Bear

 

[hman]

Just for reference, here's a table of Morse taper dimensions. Unfortunately, it doesn't include #2 1/2 ...


It's from

Dimensions of Standard Tapers

This page give the dimensions of Morse, Jacobs, Brown & Sharpe, and Jarno tapers.

littlemachineshop.com

 

[mmcmdl]

Lol They seem to worry more about length than diameter.

Long and thin , do not win .

Short and thick , do the trick .

( so I've been told )

 

[rjs44032]

Oh, never mind after reading down a little farther it's obviously not BS 7 taper.

Best Regards,
Bob

 

[Scorn64]

Just for reference, here's a table of Morse taper dimensions. Unfortunately, it doesn't include #2 1/2 ...
View attachment 364422

It's from

Dimensions of Standard Tapers

This page give the dimensions of Morse, Jacobs, Brown & Sharpe, and Jarno tapers.

littlemachineshop.com

Thank you. It’s definitely a number 3 based on this. I just wish I could use it. It seems really well built and doesn’t seem to have been used much. Maybe I’ll be able to trade it for a good quality MT2.

 

[Canus]

Pretty sure there are mt2 male to mt3 female adapters out there. Google is your friend.