Roughing and finishing turbine housings is particularly challenging in the case of passenger cars with spark-ignition engines. By Lim Gan Shu, marketing manager, Walter AG Singapore.

The new M4256, M4257 and M4258 porcupine milling cutters are versatile in terms of both the range of applications and the materials for which they can be used, which include steel, cast iron, stainless steels, and difficult-to-cut materials.