1st Recommendation2nd RecommendationRecommendation1st Recommendation2nd Recommendation Parting-Off Grooving & Grooving Tool Holders GND Type Chipbreaker Selection Grooving / Turning Grooving Cut-Off MG GG GG 第 General Feed General Feed General Feed 一 推 奨 Improved Improved Prevent Nip Improved Chip Control Chipping Chip Control Chipping Formation Good Chip Control Chipping Prevention Prevention Chip Control Prevention ML GL CG GL Low Feed General Feed Handed Type General Feed Good Good Good Chip Control Chip Control Chip Control 第 二 推 Good Reduce Good Reduce 奨 Chip Control Chattering Chipping Chip Control Chattering Chipping Prevention Prevention GF GF Low Low Cutting Force Cutting Force Profiling / Radius Grooving Outside Diameter Necking / Radius GroovingInternal Profiling For Non Ferrous Metals RG RN New RN New GA New General Feed General Feed General Feed General Feed 1st Recom- 2nd Recom- mendation mendation w = 2mm Grade Selection Steel Stainless Steel Cast Iron Exotic Alloy Non FerrousMetals AC530U AC530U AC425K AC520U H10 AC1030U* AC1030U* Uncoated Carbide Insufficient Wear Importance of Insufficient Wear Chipping Chipping Resistance Surface Finish Resistance Countermeasures Countermeasures Chipping Chipping Insufficient Wear Countermeasures Countermeasures Resistance AC520U AC520U AC520U Insufficient Wear Insufficient Wear Chipping Resistance Resistance Countermeasures Chipping Chipping Chipping Insufficient Wear Insufficient Wear Countermeasures Countermeasures Countermeasures Resistance Resistance AC830P T2500A AC830P AC530U AC530U Uncoated Cermet AC1030U* AC1030U* * Will replace grade AC530U F7