Which cutting parameter has the highest effect on tool life ?
All cutting parameters do not have the same effect on tool life. Cutting speed has the highest effect on tool life. Feed rate has a much smaller effect. Depth of cut has almost no effect.
Cutting speed increase of 20% leads to tool life reduction of 50 %.
Cutting speed increase of 50% leads to tool life reduction of 80 %.
Action point
To reduce cycle time, increase the depth of cut first, to the maximum that the tool or insert can take. Next increase the feed rate. If possible, avoid increasing the cutting sped. Use the cutting speed recommended by the tool manufacturer.
A Full profile insert finishes the complete thread profile – the root and the crest. Each thread pitch of a particular standard requires a different insert. It gives you better dimensional accuracy, and a well finished thread with no burrs.
