Specifically for Stainless Steel Applications

The all-new B21_SGL series solid carbide drills are designed specifically for stainless steel applications, offering high performance and long tool life in high-temperature alloys and regular steel, also.

By combining unique Kennametal features, such as the all-new SGL-point-geometry with patented gashing, a unique flute design, and a best-in-class coating into one tool, the B21*SGL drill is the ultimate high-volume production tool.

Features and Benefits

New SGL Point Design

  • Improved web thinning and patented gashing, which migrates in a straight cutting edge, enables high cutting parameters (feeds).
  • Creates controlled chips, which lead to a reliable performance.
  • Improved centering capabilities for better positioning accuracy and improved hole quality.

New KCMS15™ Beyond Grade

  • A monolayer PVD AlTiN-coated fi ne-grain carbide with superior surface finish.
  • First choice for stainless steel and high-temperature resistant materials for longer tool life.
  • The coating offers high hardness and excellent abrasive and adhesive wear resistance, as well as enhanced hightemperature properties, increasing its applicability, also, to MQL machining of steel.

Unique Flute Design

  • Large chip-flute cross-section and small web diameter improve the chip evacuation and the capability to drill deeper holes in difficult-to-machine materials.
  • The highly-polished surface ensures superior chip evacuation, even when low-pressure coolant is applied.

Customization

  • Intermediate diameters available as semi-standards.
  • Length variations and step drills available as custom solutions.
  • High step diameter ratios and very complex step drill geometries are not recommended for austenitic stainless steel.
  • Using Kennametal slim line hydraulic chucks is recommended if workpiece contours need to be bypassed.

High-Performance Solid Carbide Drills Tooling Solutions

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Workpiece Material
  • P Steel (462)
    • P0
      Low-Carbon Steels, Long Chipping C < .25%; <125 HB; <530 N/mm^2 UTS (462)
    • P1
      Low-Carbon Steels, Short Chipping C < .25%; <125 HB; <530 N/mm^2 UTS (462)
    • P2
      Medium and High Carbon Steels C < .25%; <220 HB; <25 HRC; >530 N/mm^2 UTS (462)
    • P3
      Alloy Steels & Tool Steels C > .25%; <330 HB; <35 HRC; 600-850 N/mm^2 UTS (462)
    • P4
      Alloy Steels & Tool Steels C > .25%; 350-420 HB; 35-43 HRC; 850-1400 N/mm^2 UTS (462)
    • P5
      Ferritic, Martensitic, and PH Stainless Steels <330 HB; <35 HRC; 600-900 N/mm^2 UTS (462)
    • P6
      High Strength Ferritic, Martensitic, and PH Stainless Steels 350-450 HB; 35-43 HRC; 900-2400 N/mm^2 UTS (462)
  • M Stainless Steel (462)
    • M1
      Austenitic Stainless Steel 130-200 HB; <600 N/mm^2 UTS (462)
    • M2
      High Strength Austenitic Stainless and Cast Stainless Steels 150-230 HB; <25 HRC; >600 N/mm^2 UTS (462)
    • M3
      Duplex Stainless Steel 135-275 HB; <30 HRC; 500-1200 N/mm^2 UTS (462)
  • S High-Temp Alloys (462)
    • S1
      Iron-Based, Heat-Resistant Alloys 160-260 HB; 25-48 HRC; 500-1200 N/mm^2 UTS (462)
    • S2
      Cobalt-Based, Heat-Resistant Alloys 250-450 HB; 25-48 HRC; 1000-1450 N/mm^2 UTS (462)
    • S3
      Nickel-Based, Heat Resistant Alloys 160-450 HB; <48 HRC; 600-1700 N/mm^2 UTS (462)
    • S4
      Titanium and Titanium Alloys 300-400 HB; 33-43 HRC; 900-1600 N/mm^2 UTS (462)
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