Wisconsin-based Walter has introduced the Walter Prototyp MC251 solid carbide milling tools that aim to increase tool life by up to 50 percent in austenitic stainless steels and nickel-base alloys. The MC251 geometry has been designed to optimize the machining of stainless materials from the ISO M material group as well as for secondary applications in ISO S materials. The new MC251 tool family is engineered to operate most efficiently on machines having an external coolant supply.
A tough carbide substrate (WK40RC) is used to provide machining reliability. In addition, the MC251 is designed to boost process reliability with its low susceptibility to vibration by incorporating asymmetrical helix angles between 35° and 38°. The tools coating, a proprietary recipe of titanium aluminum nitride aims to increase tool service life and minimize build-up on the cutting edge.