this is one of those areas where getting a really high quality blade holder for the insert pays dividends too.
I went through two of the more budget ones, but the insert seemed to come out under really heavy parting loads, and they started to distort over time and not hold the insert correctly, then I bought a kennemetal one, and its been holding whatever I feed it for a few years now with no signs of distress.
I went through two of the more budget ones, but the insert seemed to come out under really heavy parting loads, and they started to distort over time and not hold the insert correctly, then I bought a kennemetal one, and its been holding whatever I feed it for a few years now with no signs of distress.