Unknown servo motor specs

I have a couple of servo motors that I need to know more about before I try
to use them on a medium size mill I am trying to convert to CNC:

1. Label says "AMETEK, 40 V DC and some meaningless part numbers". The case
is 4" dia and 5" long with a 5/8" shaft at one end. The motor has two
brushes. How do I fugure out the maximum current for this motor? I would
have to drill the "back end" of the motor shaft to mount an encoder - is
this a reasonable thing to attempt?

2. Label says "Electro Craft Permanent Magnet Servo Motor". The case is
3.25" dia and 5" long. The motor has a 1/2" shaft at one end and a 1/4"
shaft at the other which has a small electro mechanical clutch or brake on
it. The motor has two brushes. There is no indication of voltage or current
on this motor so how do I figure out what it can take?

Both motors have been scavenged from old equipment and so I have no idea of
their background. For once though, I can get more if I decide to use them!

Regards,

Dave.

David Micklethwaite

Technical Sales Support Consultant, Cray Australia Pty Ltd
Phone: +61 2 6295 4012 Fax: +61 2 6232 6218
Suite 1, Level 2, 1-7 Franklin St, Manuka ACT, AUSTRALIA
Postal: PO Box 3543, Manuka ACT 2603, AUSTRALIA