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INSERT GRADES

STEEL MACHINING                                                                                                                                                                                                 GRADES                   A
                                                                                                                                                                                                                                         B
NEW TN620 / PV720 General Purpose
NEW TN610 / PV710 High Speed Continuous Machining

                                                                                                                                                                                                                INSERTS

SURFACE HARDENED “HYBRID STRUCTURE”                                                                                                                                                                             CBN & PCD                C
                                                                                                                                                                                                                                         D
                          Surface  Surface-Hardened Hybrid Structure                            Inner                                                                                                           TOOLHOLDERS SMALL TOOLS  E
                                                                                                                                                                                                                                         F
                                                  TN620 Structure                                                                                                                                                                        G
                                                                                                                                                                                                                                         H
                                                                                                       Surface Structure                  TN620’s inner structure has high toughness and chipping                                        J
                                                                                                       (High Hardness Cermet)             resistance along with thermal shock resistance. TN620 has                                      N
                                                                                                       • High wear resistance             a higher hardness and greater wear resistance than that of                                     P
                                                                                                                                          the conventional micro grain cermet.                                                           R
                    120%                                                                               Inner Structure                                                                                                                   T
                                                                                                       (High Toughness Cermet)
Hardness                    TN620                                                                      • Chipping and thermal

                                                                                                         shock resistance

                    100%

                                                      Conventional                                                                                                                                              BORING

                    0.000          0.039       0.079  0.118                                                 (Internal Evaluation)
                                                                                                0.157

                                   Distance from Sintered Body Surface (in)

IMPROVED TOUGHNESS AND RELIABILITY                                                                                                                                                                              GROOVING

PV720 improves performance by adopting composite lamination of MEGACOAT NANO and special TiN to
combine high adhesion resistance and great visibility of the used cutting edge even in dim light.

                    0.012          Wear Resistance Comparison                                   Cutting Conditions                                                                                              CUT-OFF
                    0.010                                                                       Workpiece : 4137 Steel
Flank Wear VB (in)  0.008                                                         Competitor A  Vc = 820sfm                        PV720                               Competitor A                             THREADING
                    0.006                                                         Competitor B  D.O.C. = 0.039”
                    0.004                                                         Competitor C  f = 0.008ipr : Wet
                    0.002                                                                       Insert: CNMG432PQ
                    0.00 0                                            PV720

                                   10 20 30 40 50 60 70                                                                                Competitor B                    Competitor C                             HSK TOOLING SPARE PARTS
                                                      Cutting Time (min)
                                                                                                                                   Flank wear condition after                        (Internal Evaluation)
                                                                                                                                   machining 48 minutes.

EASY TO VIEW CUTTING EDGE WEAR                                                                         TN620 Structure                                                                    Compressive Residual
                                                                                                                                                               High Stress in Hard Phase (MPa)

Improved strength with uniform micro grain hard phase and                                                                                                           200%                                        TECHNICAL
superior compressive stress with high melting point bonded                                                                                                          100%
phase. This combination yields greater fracture resistance.

                                                                                                Surface Structure                        Inner Structure       Low        TN620            Conventional
                                                      Fracture Resistance Comparison                                                                                                   Micro Grain Cermet
                                                                                                                                                                                     (Internal Evaluation)
                                                                                                                                                Cutting Conditions
PV720                                                                                                                                           Workpiece : 1045 Structural Steel                               INDEX
                                                                                                                                                Vc = 820sfm
Competitor A                                                                                                                                    D.O.C. = 0.039”
Competitor B                                                                                                                                    f = 0.008ipr : Wet
                                                                                                                                                Insert: CNMG432PQ

Competitor C                              500  1000                 1500                        2000   2500                        3000   3500  (Internal Evaluation)
                     0

                                                                    Number of Impacts

                                                                                                kyocera@kyocera-tools.ru                                                                                        A7
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