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Lathe tools \ Technical introduction–CBN turning

                      Selection of the cutting material types when machining with PCBN


         We distinguish the different cutting material types according to their CBN content. In the case of a high CBN content, materials such as cast iron, special alloys and
         sintered steels can be machined. For hard machining, the CBN content must be reduced.
         A distinction is made between the following cutting materials:
               Coating                       CBN content
                           100  90   80  70   60  50   40  30   20  10

               uncoated       ABC-10

               uncoated
                                              ABC-25
               uncoated                       ABC-40

               coated
                               ABC-10B
               coated                          ABC-25B


               coated
                                               ABC-40B

         CBN grades, uncoated:                              CBN grades, coated:
         ABC-10                                             ABC-10B
         ƒ Uncoated CBN type with very high CBN content (95%) for application in grey     ƒ CBN cutting material coated with 95% CBN content for application in grey cast
          cast iron, special alloys, sintered steels         iron (GG20-GG40) and special alloys such as Inconell 718, Nicomic, Hastelloy,
         ƒ Fine grain 1-1.5 μm                               Waspaloy
         ƒ Application both in favourable conditions (smooth cut) and unfavourable condi-    ƒ Fine grain (1-1.5 µ)
          tions (non-continuous cut) ap = 0.1-0.7 mm          ƒ Application both in favourable conditions (smooth cut) and unfavourable condi-
                                                             tions (non-continuous cut) ap = 0.1-0.7 mm
         ABC-25
         ƒ Uncoated CBN type with low CBN content (65%) in hard cutting, dry + wet from   ABC-25B
          HRC 52 - 65                                         ƒ CBN cutting material coated with 65% CBN content for application in hard
         ƒ Fine grain (3 μm)                                 machining 48-62 HRC (wet-dry)
         ƒ Application in favourable conditions (smooth cut) and very lightly interrupted     ƒ Fine grain (1 - 2µ)
          cutting ap = 0.05 - 0.4 mm                          ƒ Application in favourable conditions (smooth cut) ap = 0.02 - 0.4 mm
         ABC-40                                             ABC-40B
         ƒ Uncoated CBN type with low CBN content (65%)       ƒ CBN cutting material coated with 55% CBN content for application in hard
         ƒ Hard machining, dry + wet from HRC 54 - 65        machining 48-62 HRC (wet-dry)
         ƒ Application in unfavourable conditions for lightly and heavily interrupted cutting ƒ  Superfine grain (0.75 µ)
          ap = 0.05 - 0.4 mm                                  ƒ Application in unfavourable conditions for lightly and heavily interrupted cutting
                                                             ap = 0.05-0.4 mm


































              Source: Hahn+Kolb Werkzeuge GmbH
              Technical data subject to change.                                           www.iconridge.com  553
              Availability subject to country specific rules and regulations.
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