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      HTS-C Drilling Inserts
      HTS-C Drilling Inserts
      HTS-C Drilling Inserts
      HTS-C Drilling Inserts

      SPHX-R21

      HTS-C Drilling Inserts

      Metric
      Inch
      SAP Material Number 5692809
      ISO Catalog Number SPHX060204R21
      ANSI Catalog Number SPHX060204R21
      Grade KCU25
      [D] Insert IC Size 6.3500
      [D] Insert IC Size .2500
      [D1] Insert Hole Size 2.8500
      [D1] Insert Hole Size .1122
      [S] Insert Thickness 2.3800
      [S] Insert Thickness .0937
      [Rε] Corner Radius 0.4000
      [Rε] Corner Radius .0156
      [GAA] Insert Rake Angle 4.000
      [Clearance Angle Major 7.000
      Clearning Angle Minor 7.000
      See all Product Variants

      Workpiece Materials

      K Cast Iron

      Features and benefits

      • Double-sided insert style.

      Machine Side

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      Workpiece Side

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      Grades

      • KC7210

        Composition: PVD TiAlN coated fine-grain carbide with enhanced hot hardness properties.
        Application: Best suited for dry machining of cast iron. The enhanced hot hardness properties of the substrate combined with a wear-resistant TiAlN coating offer highest material removal rates using the triple fluted drill design.

        P Steel
        K Cast Iron
        N Non-Ferrous
      • KC7215

        Composition: PVD TiAlN coated fine-grain carbide.
        Application: Best suited for machining of alloyed steel and cast iron. This grade offers reliable performance at intermediate cutting conditions.

        P Steel
        M Stainless Steel
        K Cast Iron
        S High-Temp Alloys
      • KCPK10

        Composition: Advanced CVD TiCN-Al2O3 coating combined with a cobalt-enriched carbide substrate.
        Application: The KCPK10 grade offers a balanced combination of deformation resistance and edge toughness leading to outstanding abrasion and crater wear resistance for high-speed machining of steel and cast iron. Use for very high cutting speeds with low to medium feed rates.

        K Cast Iron
      • KCU25

        Composition: An advanced PVD grade with hard AlTiN coating and fine-grain unalloyed substrate. The new and improved coating improves edge stability with wide range speed and feed capabilities.
        Application: The KCU25™ grade is ideal for general machining of most steels, stainless steels, high-temp alloys, titanium, irons, and non-ferrous materials in a wide range of speeds and feeds with improved edge toughness for interrupted cuts and high feed rates.

        K Cast Iron
      • KCU40

        Multilayered PVD TiN-TiAlN-coated fine-grain carbide, offering
        highest wear resistance in steel, stainless steel, cast iron, and high-temp alloys.

        K Cast Iron
      • KM1

        Composition: Uncoated, fine grain, straight carbide grade, containing 6% cobalt.
        Application: General purpose grade for use on gray iron, aluminum, and non-ferrous
        work piece materials. Available for use with HTS-C deep drilling tools and CTR
        countersinking tools.

        K Cast Iron
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