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(OP)
i was wondering if anybody knew what cnmg, dnmg, and tnmg stood for?  i know there are more of them i just cant remember them all yet.  is there a website where i could look something like this up?

RE: insert question

We use the Kennametal lathe tooling catalog for this.  

Thomas J. Walz
Carbide Processors, Inc.
www.carbideprocessor.com

RE: insert question

Those are the shapes of the inserts......ex CNMG is a somewhat diamond shape (4 sides)....WNMG is a somewhat triangle shape (3 sides).....VNMG is a very steep diamond shape (4 sides)....good for profiling where a lot a clearance is needed....etc......any good catalog will describe each shape.

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