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Reaming tools \ Technical introduction – reaming

                      Coatings for reamers


         Titanium nitride                                     Titanium carbon nitride
         ƒ Long proven standard layer                         ƒ Very high hardness
         ƒ High hardness                  TiN                 ƒ High adhesive strength        TiCN
         ƒ Very good adhesive strength                        ƒ Relatively high thermal conductivity
         ƒ Sufficient toughness                               ƒ Low friction coefficient against steel
         ƒ Affordable universal layer                         ƒ Vickers hardness: 3500 HV
         ƒ Vickers hardness: 2200 HV                          ƒ Friction coefficient of steel: 0.2
         ƒ Friction coefficient of steel: 0.5                 ƒ Temperature resistance: 400°
         ƒ temperature resistance: 600°                       ƒ Colour: blue-grey
         ƒ Colour: gold                                       ƒ Coating process: PVD
         ƒ Coating process: PVD

         titanium aluminium nitride                           Titanium aluminium carbon nitride
         ƒ universal layer for high-performance               ƒ Universal layer for high-performance
          machining with high cutting speed   TiAlN            machining with high cutting speed   TiAlCN
         ƒ marked thermal and chemical stability              ƒ Low friction
         ƒ very high hardness                                 ƒ Very high hardness
         ƒ very good heat resistance                          ƒ High oxidation resistance
         ƒ relatively low thermal conductivity                ƒ Relatively low thermal conductivity
         ƒ Vickers hardness: 3200 HV                          ƒ Vickers hardness: 3500 HV
         ƒ friction coefficient of steel: 0.55                ƒ Friction coefficient of steel: 0.20
         ƒ temperature resistance: 900–1000°                  ƒ Temperature resistance: 800°
         ƒ colour: dark blue-grey                             ƒ Colour: antique pink
         ƒ coating process: PVD                               ƒ Coating process: PVD

         titanium aluminium silicone nitrides
         ƒ high-performance cutting for machining very
          abrasive or hard materials such as steel up to   TiAlSiN
          63 HRC
         ƒ very high hardness
         ƒ high wear resistance
         ƒ Vickers hardness: 3500 HV
         ƒ friction coefficient of steel: 0.70
         ƒ temperature resistance: 900°
         ƒ colour: blue-violet
         ƒ coating process: PVD


                      Flute shapes and applications for reamers


         straight flute                                      left-twisted flute
         ƒ for blind holes                                   ƒ For through-bores
         ƒ chips are transported backwards                   ƒ chips are transported forwards
         ƒ larger chip angle                                 ƒ better with intermittent cuts
                                                             ƒ reduced chip angle
































              Source: Hahn+Kolb Werkzeuge GmbH
              Technical data subject to change.                                           www.iconridge.com  133
              Availability subject to country specific rules and regulations.
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