OPERATING GUIDELINES , ROUND LINE - STANDARD BALL NOSE AND END MILLS Workpiece Cutting depth Cutting width Material ap recomm. for DC Ball nose mill End mill Recommended in in in ae % Unalloyed steel .125-.250 .004 x D .0500 x D 40% P .312-.500 .004 x D .0500 x D 40% .625-1.00 .004 x D .0500 x D 40% High Carbon steel .125-.250 .003 x D .030 x D 30% < 1100N/mm² P .312-.500 .003 x D .030 x D 30%.625-1.00.003 x D.030 x D30% Alloyed / Tool steel .125-.250 .0025 x D .030 x D 25% < 1400N/mm² P .312-.500 .0025 x D .030 x D 25%.625-1.00.0025 x D.030 x D25% Stainless steel .125-.250 .003 x D .030 x D 30% M .312-.500 .003 x D .030 x D 30% .625-1.00 .003 x D .030 x D 30% Gray cast iron .125-.250 .003 x D .030 x D 40% K .312-.500 .003 x D .030 x D 40% .625-1.00 .003 x D .030 x D 40% Cast alloys .125-.250 .003 x D .030 x D 30% K .312-.500 .003 x D .030 x D 30% .625-1.00 .003 x D .030 x D 30% Aluminum .125-.250 .040 x D .040 x D 30% N .312-.500 .040 x D .040 x D 30% .625-1.00 .040 x D .040 x D 30% Plastics .125-.250 .0040 x D .040 x D 10% N .312-.500 .0040 x D .040 x D 10% .625-1.00 .0040 x D .040 x D 10% Super alloys .125-.250 .0040 x D .020 x D 10% S .312-.500 .0040 x D .020 x D 10% .625-1.00 .0040 x D .020 x D 10% Hardened steel .125-.250 .0025 x D .030 x D 25% 48 - 54 HRC .312-.500 .0025 x D .030 x D 25% .625-1.00 .0025 x D .030 x D 25% Hardened steel .125-.250 .002 x D .027 x D 20% 54 - 63 HRC .312-.500 .002 x D .027 x D 20% .625-1.00 .002 x D .027 x D 20% Hardened steel .125-.250 .002 x D .024 x D 10% > 63 HRC .312-.500 .002 x D .024 x D 10% .625-1.00 .002 x D .024 x D 10% General Information: Machining of aluminum and duroplastics with grade IN05S, any other materials with IN2005 / IN2006. Max. cutting depth of end mills is determined by cutting length a = xxx in; for ball nose cutters max. cutting depth is determined by radius. Please consider the limitation of max. RPM1 of the machine! 465