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How To Choose

                 The Correct Carbide Grade?


                 As the people engaged in production like to say, the best carbide grade is the grade that you have in   MILLING TITANIUM
                 your stock. This statement (which can be related to the cutting tool as a whole) is probably true if it
                 is a production situation that requires an operative decision. However, productive process planning,
                 or effective tool stock managing requires more serious applicative analyzing of the pros and cons
                 of the proposed carbide grades. Fig. 3-6 with schematic representations of the application
                 field of the grades, illustrate clearly the conclusions regarding recommended grade selection.


                 Indexable Milling Cutters
                 IC840 is the most universal carbide grade, and therefore it should be considered as the
                 first-choice grade, especially in the most general cases of process engineering.

                 Grade IC808 features higher hardness compared to IC840. It is suitable mostly for
                 semi-finish and finish operations and may be defined as a second-choice grade.
                 IC882 is the strongest among the main cemented carbide grades for indexable
                 milling titanium. It is intended primarily for heavy duty milling, machining in
                 unfavorable conditions, for cases with significant impact load, etc.

                 With regards to the complementary grades, IC380 has proved itself, in milling when
                 the rigidity of a  technological system is high; and IC5820 shows impressive results
                 in machining with high pressure coolant supply (HPC), preferably pin-pointed.

                 Comparative characteristics of grade performance in specific cases
                 of indexable milling titanium are shown in Table 4.




                 Table 4 Performance Of Carbide Grades In Specific Milling Applications
                                                    Comparative performance

                           Heavy duty  Fast feed    HPC*       Unfavorable  High rigidity  Finishing at
                           Cutting     Milling (FF)            Conditions  Of system   Small ae**
                  Grade
                  IC808        ♦           ◊            ♦           ♦         ♦♦◊          ♦♦♦

                  IC840        ♦♦          ♦♦         ♦♦◊          ♦♦          ♦♦          ♦♦
                  IC882       ♦♦♦         ♦♦♦           ♦         ♦♦♦          ♦♦          ♦◊

                  IC380        ♦            ♦           ♦           ♦         ♦♦♦          ♦♦

                  IC5820       ♦◊          ♦◊         ♦♦♦          ♦◊         ♦♦◊         ♦♦◊
                  IC830        ♦◊          ♦♦           ♦          ♦♦          ♦♦          ♦◊

                  IC330        ♦♦          ♦♦          ♦◊         ♦♦◊          ♦◊           ♦

                  * high pressure coolant supply
                  ** ae - width of cut













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