When can carbide inserts outperform cobalt/HSS? | Tuesday Tooling Tip #40

Are you experiencing consistent wear on a cobalt insert? If so, you might want to try carbide for increased life of the cutting edge. When running a cobalt or high-speed steel substrate, you should see even heat mark distribution from the corners up along the cutting edge and tapering off at the point. When we see this type of wear, and the performance is as expected, we can now look at ways to increase the penetration rate and thereby reduce manufacturing cycle time. This is where carbide could be considered. You’ll be able to increase speed, and feed will be about the same, but your penetration rate will increase overall, and therefore your cost per hole will decrease. Another option is to run a carbide insert at the same speed as the high-speed steel insert and extend tool life. 
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