When choosing the correct turning insert, finding the best insert for the job is just half the battle. The rest of it is selecting the best grade and chip breaker! Below we outline how to approach selecting the best insert shape and grade for your specific jobs.
What is the best insert geometry & shape for roughing or finishing?
The first question you must ask is are you roughing, finishing or just doing some general turning? Negative inserts are strongest and the best option for roughing and general turning applications, as these will allow deeper depths of cut and higher feed rates due to strong insert shapes and thickness. Top tip – Lever lock or double clamp style tool holders give higher clamping strength and stability compared to screw clamp holders.
If you are finishing, positive inserts are always the best option as these create less cutting forces and can therefore get away with lower depths of cut, eliminating vibration.
What is the best insert geometry & shape for roughing or finishing?
The first question you must ask is are you roughing, finishing or just doing some general turning? Negative inserts are strongest and the best option for roughing and general turning applications, as these will allow deeper depths of cut and higher feed rates due to strong insert shapes and thickness. Top tip – Lever lock or double clamp style tool holders give higher clamping strength and stability compared to screw clamp holders.
