What is the effect of increased spindle speed on tool life?

Increased spindle speed typically leads to higher cutting speeds at the tool engagement point. This increase in cutting speed generates more heat due to friction between the tool and the material being cut. Elevated temperatures can accelerate tool wear, especially for cutting tools that have a specific heat tolerance. As the tool reaches higher temperatures, its hardness can diminish, leading to premature failure or a reduction in its overall lifespan.

Additionally, increased spindle speeds may cause greater vibrations during machining, which can further impact tool integrity and result in quicker wear. Thus, as spindle speed rises, the combination of elevated temperatures and possible vibrations contributes significantly to a decrease in tool life.