I would suggest you look at the price of the inserts - if you tool can use
inserts without holes, the inserts are cheaper - look for a common size
(like TPG-32 or the SPG-42) - look at a catalog on how to decode the
number - T=triangle, P=positive, first number =diameter of inscribed circle
in 1/8ths of an inch (e.g. 3/8), and so on - all of the on line insert
company catalogs have a page or two explaining this - that will help a lot.

See what inserts you can get cheaply, surplus

GeoLane at PTD dot NET wrote in message
...

I'm looking at R8 carbide indexable end mills from CDCO to use for
cleaning up rusty stock and squaring up stock. One says it uses
tpg-32 inserts. Are those the same as tpg-322?

Another alternative is a similar 2.5" indexable end mill, which uses
a different insert. SPG422 carbide Positive rake, 15 Degree lead angle
I have a Bridgeport with the 2J head. Which of the two is more likely
to give a good finish on hot and cold rolled steel?

What difference does the positive rake and 15º lead angle make?

Here's a link to the 2" one
http://www.cdcotools.com/item.php?itemid=126

Here's the link to the 2.5" one
http://www.cdcotools.com/item.php?itemid=471

RWL