INSLINSL AH725AH725 INSERT ETX CW RE P Steel M Stainless K Cast iron N Non-ferrous S Superalloys : First choice H Hard materials : Second choice External Coated Designation CW±0.05 RE INSL Internal ETX4-040 4 0.4 z 8 ETX5-040 5 0.4 z 10 Face ETX6-040 6 0.4 z 12 䖃 : Line up Parting EGM Others CW RE P Steel M Stainless K Cast iron N Non-ferrous S Superalloys : First choice H Hard materials : Second choice Coated Designation CW±0.05 RE INSL EGM4-030 4 0.3 z 8 䖃 : Line up STANDARD CUT TING CONDITIONS ISO Workpiece material   Hardness Grade Chipbreaker Cutting speedVc (m/min) Low carbon steel - 300 HB AH725 ETX 80 - 180 S45C, etc. S15C, etc. - 300 HB AH725 EGM 80 - 180 Carbon steel, Alloy steel - 300 HB AH725 ETX 80 - 180 S55C, etc. SCM440, etc. - 300 HB AH725 EGM 80 - 180 Prehardened steel - 300 HB AH725 ETX 80 - 180 NAK80, etc. PX5, etc. - 300 HB AH725 EGM 80 - 180 Stainless steels - AH725 ETX 50 - 120 SUS303, etc. SUS316, etc. - AH725 EGM 50 - 120 Reference pages: Toolholders → F133 - F135 F136 www.tungaloy.com