When choosing a turning insert, there are many parameters to consider. Carefully select insert geometry, insert grade, insert shape (nose angle), insert size, nose radius and leading (entry) angle for good chip control and machining performance.

Select the insert geometry according to the selected operation (e.g. finishing), choose the largest possible nose angle to ensure insert strength and economy, choose the insert size according to the depth of cut, and choose the largest possible nose radius to ensure Insert strength, if there is a tendency to vibrate, choose a smaller nose radius.

Turning geometries can be divided into 3 basic types optimized for finishing, semi-finishing and roughing operations.

Roughing: A combination of large depth of cut and high feed rate. Operations requiring the highest cutting edge safety.

Semi-finishing: Semi-finishing to light roughing operations. Various combinations of cutting depths and feed rates.

Finishing: An operation performed with a small depth of cut and low feed rate. Operations requiring low cutting forces.