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vf(IPM)31.929.123.620.931.929.123.620.931.929.123.620.931.929.123.620.9n(min-1)25,17022,95018,59016,52025,17022,95018,59016,52025,17022,95018,59016,52025,17022,95018,59016,520vf(IPM)41.337.430.326.841.337.430.326.841.337.430.326.841.337.430.326.8n(min-1)24,94022,68018,37016,33024,94022,68018,37016,33024,94022,68018,37016,33024,94022,68018,37016,330vf(IPM)45.741.733.929.945.741.733.929.945.741.733.929.945.741.733.929.9n(min-1)27,71025,20020,41018,14027,71025,20020,41018,14027,71025,20020,41018,14027,71025,20020,41018,140vf(IPM)55.950.841.336.655.950.841.336.655.950.841.336.655.950.841.336.6n(min-1)29,62027,00021,87019,44029,62027,00021,87019,44029,62027,00021,87019,44029,62027,00021,87019,440vf(IPM)71.365.052.846.971.365.052.846.971.365.052.846.971.365.052.846.9n(min-1)33,44030,60024,79022,03033,44030,60024,79022,03033,44030,60024,79022,03033,44030,60024,79022,030【Note】ap(inch)① Use the appropriate coolant for the work material and machining shape.② These Recommended Cutting Conditions indicate only the rule of a thumb for the cutting conditions. In actual machining, the condition should be adjusted according to the machining shape, purpose and the machine type. ③ If the rpm of the machine is low, lower the feed rate also to put the rpm and feed rate in the same ratio.(1) ap indicates guidelines for Group 1 workpieces. For other groups, adjust cutting depth based on the cutting depth factors in the above table.(2) In cases in which cutting chips may cause clogging--for example, for rib cutting and blind grooves--set the cutting depth using a cutting depth factor to calculate the cutting depth amount. This amount should then be reduced to 80% of the calculated value.(3) Adjust by setting ae to (5 or less) × (ap) × (cutting depth ratio). For finishing cutting, calculate the theoretical cusp height and set accordingly.(4) The recommended slope entrance angle when engraving is 1° or less. Adjust the feed rate to 70% or less of values presented in the cutting condition table.(5) When slotting such engraving letters, adjust the feed rate to 50% or less and ap to 30% or less of the values shown. We recommend reciprocal cutting.Cutting depth setting example: When cutting rib groove contours in hardened steel (50HRC) using an EPDREH2010-2-02-TH3 tool:Cutting depth = .004 inch (0.11mm) (ap) × 0.85 (cutting depth factor for Group 2 Hardened steels) × 0.8 (for closed-area cutting) = .003 inch (0.075mm).039Hardened Steel（65〜68HRC）Hardened Steel（68〜72HRC）Pre-hardened（35〜45HRC）Steel.0006.0005.0004.0003.0018.0011.0007.0006.0026.0015.0009.0009.0043.0028.0016.0016100%High efficiencycuttiing condition1285%80%65%3455%Tool dia.DC(inch)RE(inch)length(inch).079.157.236.315.079.157.236.315.079.157.236.315.079.157.236.315Work materialCutting depth ratioUnder neckCorner radius.001.002.004.0082 FlutesRevolutionFeed rateRevolutionFeed rateRevolutionFeed rateRevolutionFeed rateFor detailed information on high-accuracy cutting conditions, refer to page A165.RevolutionFeed rateHigh accuracy cuttiing conditionHardened Steel（45〜55HRC）Hardened Steel（55〜65HRC）A164EPDREH2-TH3Inch5Epoch Deep Radius Evolution Hard-TH3