Boring Technical information Recommended cutting conditions Boring: Positive insert (Cutting diameter over 10 mm) ISO Corner-R Lower limit - Recommendation - Upper limit Workpiece material Hardness Cutting range Applications Chipbreaker Insert grades classification (RE) Vc (m/min) ap (mm) f (mm/rev) Precision finishing ContinuousInterruptionF, U TN620 0.1 250 - 300 - 350PR17250.2120 - 170 - 2200.05 - 0.3 - 0.50.05 - 0.3 - 0.50.03 - 0.1 - 0.150.03 - 0.1 - 0.15 Low-carbon steel HB Finishing ContinuousInterruptionXP PV710 0.4 200 - 250 - 300CA5250.4150 - 200 - 2500.2 - 0.5 - 1.00.2 - 0.5 - 1.00.05 - 0.1 - 0.20.05 - 0.1 - 0.2 ≤ Low-carbon alloy 300 Finishing-Medium ContinuousInterruptionXQ PV710 0.4 150 - 200 - 250CA5250.4100 - 150 - 2000.5 - 1.0 - 2.00.5 - 1.0 - 1.50.1 - 0.15 - 0.250.1 - 0.15 - 0.2 Medium ContinuousInterruptionStandard PV720 0.8CA5250.8 100 - 150 - 20080 - 120 - 1501.0 - 1.5 - 2.51.0 - 1.5 - 2.0 0.1 - 0.15 - 0.30.1 - 0.15 - 0.2 Precision finishing ContinuousInterruptionF, U TN620 0.2 150 - 200 - 250PR17250.4120 - 140 - 1700.05 - 0.3 - 0.50.05 - 0.3 - 0.50.03 - 0.1 - 0.150.03 - 0.1 - 0.15 Medium-carbon steel HB Finishing ContinuousInterruptionPP PV710 0.4 150 - 200 - 250CA5250.4120 - 180 - 2000.2 - 0.5 - 1.00.2 - 0.5 - 1.00.05 - 0.1 - 0.20.05 - 0.1 - 0.2 P* ≤ F Medium-carbon alloy 300 Finishing-Medium ContinuousInterruptionHQ PV710 0.4 120 - 180 - 220CA5250.4100 - 150 - 2000.5 - 1.0 - 2.00.5 - 1.0 - 1.50.1 - 0.15 - 0.250.1 - 0.15 - 0.2 Medium ContinuousInterruptionStandard PV720 0.8CA5250.8 100 - 150 - 20080 - 120 - 1501.0 - 1.5 - 2.51.0 - 1.5 - 2.0 0.1 - 0.15 - 0.30.1 - 0.15 - 0.2 Precision finishing ContinuousInterruptionF, U TN620 0.2 120 - 150 - 180PR17250.4110 - 130 - 1600.05 - 0.3 - 0.50.05 - 0.3 - 0.50.03 - 0.1 - 0.150.03 - 0.1 - 0.15 HB Finishing ContinuousInterruptionPP PV710 0.4 120 - 150 - 180CA5250.4100 - 120 - 1500.2 - 0.5 - 1.00.2 - 0.5 - 1.00.05 - 0.1 - 0.20.05 - 0.1 - 0.2 High-carbon alloy ≤ 280 Finishing-Medium ContinuousInterruptionHQ PV710 0.4 120 - 150 - 180CA5250.4100 - 120 - 1500.5 - 1.0 - 2.00.5 - 1.0 - 1.50.1 - 0.15 - 0.250.1 - 0.15 - 0.2 Medium ContinuousInterruptionStandard CA515 0.8CA5250.8 100 - 120 - 15080 - 100 - 1201.0 - 1.5 - 2.51.0 - 1.5 - 2.0 0.1 - 0.15 - 0.30.1 - 0.15 - 0.2 HB Finishing ContinuousInterruptionMQ CA6525 0.4 120 - 150 - 180PR15350.8100 - 120 - 1500.2 - 0.5 - 0.80.2 - 0.5 - 0.80.05 - 0.08 - 0.10.05 - 0.08 - 0.1 Stainless steel ≤ 220 Medium ContinuousInterruptionStandard CA6525 0.4PR15350.8120 - 150 - 180100 - 120 - 1500.5 - 1.0 - 1.50.5 - 1.0 - 1.50.05 - 0.1 - 0.20.05 - 0.1 - 0.2 M HB Finishing ContinuousInterruptionMQ CA6525 0.4PR15350.880 - 100 - 12060 - 80 - 1000.2 - 0.7 - 1.0 0.05 - 0.1 - 0.150.2 - 0.7 - 1.00.05 - 0.1 - 0.15 Stainless steel ≤ 300 Medium ContinuousInterruptionStandard CA6525 0.4PR15350.880 - 100 - 12060 - 80 - 1000.5 - 1.0 - 1.50.5 - 1.0 - 1.5 0.05 - 0.1 - 0.20.05 - 0.1 - 0.2 High speed finishing ContinuousInterruptionWithout chipbreakerKBN475PT600M0.40.8 400 - 500 - 600200 - 250 - 3500.05 - 0.2 - 0.50.2 - 0.5 - 1.00.05 - 0.1 - 0.150.05 - 0.1 - 0.15 HB FinishingGloss orientedContinuousInterruptionStandard PV7005 0.8TN6200.8 200 - 250 - 300120 - 180 - 2300.2 - 0.5 - 1.00.2 - 0.5 - 1.00.05 - 0.1 - 0.20.05 - 0.1 - 0.2 Gray cast iron ≤ 250 Finishing ContinuousInterruptionStandard CA310 0.4CA3150.8 150 - 180 - 200100 - 150 - 1800.2 - 0.5 - 1.00.2 - 0.5 - 1.00.05 - 0.1 - 0.20.05 - 0.1 - 0.2 Medium Continuous Standard CA310 0.8InterruptionWithout chipbreakerCA3150.8100 - 150 - 20080 - 120 - 1500.5 - 1.0 - 2.00.5 - 1.0 - 2.00.1 - 0.15 - 0.20.05 - 0.1 - 0.15 K High speed finishing ContinuousInterruptionWithoutchipbreakerKBN60M 0.4PT600M0.8200 - 300 - 400150 - 200 - 2500.05 - 0.2 - 0.50.2 - 0.5 - 1.00.03 - 0.05 - 0.10.05 - 0.1 - 0.15 HB FinishingGloss orientedContinuousInterruptionStandard PV7005 0.8TN6200.8 150 - 200 - 250120 - 150 - 2000.2 - 0.5 - 1.00.2 - 0.5 - 1.00.05 - 0.1 - 0.20.05 - 0.1 - 0.2 Nodular cast iron ≤ 270 Finishing ContinuousInterruptionStandard CA310 0.4CA3150.8 120 - 150 - 180100 - 120 - 1500.2 - 0.5 - 1.00.2 - 0.5 - 1.00.05 - 0.1 - 0.20.05 - 0.1 - 0.2 Medium ContinuousInterruptionStandard CA315 0.8CA3200.8 100 - 120 - 15080 - 100 - 1200.5 - 1.0 - 2.00.5 - 1.0 - 2.0 0.05 - 0.1 - 0.20.05 - 0.1 - 0.15 Non-ferrous metals High speed finishing ContinuousRainbow surface glossWithoutchipbreakerKPD0010.2 200 - 400 -1,000 0.05 - 0.1 - 0.3 0.05 - 0.1 - 0.15 N Copper alloyAluminumHB≤100 Finishing ContinuousLong tool lifeInterruptionF, UPDL025 0.40.4 100 - 200 - 400100 - 200 - 4000.05 - 0.5 - 1.00.05 - 0.5 - 1.00.03 - 0.1 - 0.20.03 - 0.1 - 0.2 Aluminum alloys Finishing ContinuousInterruptionF, U KW10 0.40.4 100 - 200 - 400100 - 200 - 4000.05 - 0.5 - 1.00.05 - 0.5 - 1.00.03 - 0.1 - 0.20.03 - 0.1 - 0.2 Precision finishing Continuous WithoutHBRainbow surface glossInterruptionchipbreakerKPD0010.20.4100 - 120 - 15070 - 100 - 1200.05 - 0.1 - 0.30.05 - 0.1 - 0.30.03 - 0.07 - 0.10.03 - 0.07 - 0.1 Titanium alloys ≤ 400 Finishing ContinuousInterruptionF, U KW10 0.20.4 30 - 50 - 7030 - 50 - 700.05 - 0.5 - 1.0 0.03 - 0.1 - 0.20.05 - 0.5 - 1.00.03 - 0.1 - 0.2 S HB Finishing ContinuousInterruptionF, U KW10 0.40.4 10 - 30 - 5010 - 30 - 500.05 - 0.5 - 1.0 0.03 - 0.1 - 0.20.05 - 0.5 - 1.00.03 - 0.1 - 0.2 Heat-resistant alloys ≤ 350 Finishing ContinuousInterruptionMQ PR1310 0.40.8 40 - 60 - 8040 - 60 - 80 0.1 - 0.3 - 0.5 0.03 - 0.05 - 0.10.1 - 0.3 - 0.50.03 - 0.05 - 0.1 40~50HRC Finishing Continuous HQInterruptionStandardCA515 0.80.8 60 - 80 - 10030 - 50 - 700.05 - 0.3 - 0.5 0.05 - 0.08 - 0.10.05 - 0.3 - 0.50.05 - 0.08 - 0.1 H Hardened steel FinishingHard materials45~68ContinuousInterruptionMEMET KBN05M 0.40.8 100 - 140 - 18090 - 120 - 1600.1 - 0.2 - 0.3 0.02 - 0.07 - 0.10.1 - 0.2 - 0.30.02 - 0.07 - 0.1 HRC Medium Continuous Without chipbreakerNegativeKBN900 0.8 60 - 80 - 100 0.3 - 0.7 - 1.0 0.03 - 0.1 - 0.15 * When machining free-cutting steel such as SUM, please use PR1725 for Vc = 200 m/min or under or use PV720 / CA515, etc. • ap indicates radius F124