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The all-new B21_SGL series solid carbide drills are designed specifi cally 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 centring 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 fi nish.
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-fl ute cross-section and small web diameter improve the chip evacuation and the capability to drill deeper holes in diffi cult-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.
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