Insert GradesSteelStainlessSteelCast IronExotic AlloyHardene dNon-FerrousSteelMetalFor SmallLathes WorkCutting Speed Vc (m/min) MaterialDepth of Cut ap (mm) Depth of Cut ap (mm) Depth of Cut ap (mm) Depth of Cut ap (mm) Cutting Speed Vc (m/min) Depth of Cut ap (mm) Depth of Cut ap (mm) Depth of Cut ap (mm) Chipbreaker and Grade Selection Guide for Turning Steel Steel Grades ● Fine Cutting to Finishing (Cermet) ● Finishing to Roughing (Coated Carbide) 400 400 High-speed Cutting High-speed CuttingT1000A300 High-speed to General-purpose CuttingT1500Z AC8015P300 General-purpose Cutting General-purpose CuttingA200T1500A 200 AC8025PContinuous/Light Cutting 100 General-purpose andInterrupted Cutting 100 AC6030M Interrupted to Heavy Interrupted CuttingAC8035P T3000Z For Small Lathes AC1030U 0 0 Fine Cutting Finishing Finishing Roughing Continuous Partially Interrupted Interrupted Continuous Partially Interrupted Interrupted Main Chipbreakers Negative Type Positive Type MU Type MU Type 6 ME Type ME Type 3 MU Type GE Type SU Type SU Type (Emphasis on crater wear resistance) MU Type 4 2 GU Type LB Type GE Type (Sharper Edge)SE TypeGU Type LB Type 2 SU Type SU Type 1 LU Type LU Type FB Type FE Type FB Type SE Type 0 0.2 0.4 0.6 0 0.2 0.4 Feed Rate f (mm/rev) FE Type Feed Rate f (mm/rev) Sub-Chipbreakers Negative Type Chipbreakers for High-efficiency Machining Strong Cutting Edge Chipbreakers 6 6 ME Type MX Type 4 4 UX Type GE Type SE Type 2 2 SX Type FE Type 0 0.2 0.4 0.6 0.8 0 0.2 0.4 0.6 Feed Rate f (mm/rev) Feed Rate f (mm/rev) Chipbreakers for Shallow Depth of Cut Wiper Insert Chipbreakers for Heavy Cutting 15 3 6 HF Type 10 2 4 HW Type LU Type GUW Type 1 FB Type 2 SEW Type 5 HU Type FL Type/FA Type FE Type LUW Type MP Type HP Type 0 0.2 0.4 0.6 0 0.3 0.6 0.9 0 0.4 0.8 1.2 1.6 Feed Rate f (mm/rev) Feed Rate f (mm/rev) Feed Rate f (mm/rev) A10