It is seemed that this leads to an increase in the effective rake
angle, and then results a decrease in the cutting force.
announces a new series of carbide-tipped capscrew counterbores designed with helical flutes to provide positive effective rake
. These new tools are available in inch and metric sizes, and feature heat-treated alloy steel straight shanks, with integral pilots and material specific carbide grades.
The counterbores are designed with helical flutes to provide positive effective rake
. The end-cutting edges are sharpened slightly ahead of center to provide a shearing cutting action and eliminate chatter.