The TCMT are positive rake and are usually more suited to home sho
use.
Negative inserts need more grunt to use properly but are stronger.I'v never tried any negative rake on my Myford and other peoples mileag may vary.I use the TCMT inserts and up to now I've found the Sandvi ones are best for me.
I mostly use HSS tooling,but the carbide inserts have their uses a times.I used one yesterday to turn a rubber hockey puck down to use o a model engine starter,I had more success with the tip than HSS.
Alla
-- Allan Waterfal
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