Precision Twist 209CO 1 11/64 4MTS Bronze Cobalt Taper Shank Drill 135 Degree Thinned Point 021411

The Precision Twist 209CO Taper-Length Drill Bit Is A 135-Degree, Notch-Point, Heavy Duty, Morse Taper Shank Drill Bit Made Of High Speed Steel And Cobalt With A Gold Oxide Finish. Best Performance With Drilling Into Hardened, Tempered Alloy Steel, Nodular Graphite Malleable Cast Iron, And Stainless. It Is Suitable For Drilling To A Depth Up To Four Times The Diameter Of The Drill.The 209CO Series Has A Type N Flute Form, With A Regular Helix Angle (21 to 34 degrees). The Gold Oxide Is A Low Temperature Heat Treatment Which Reduces Grinding Stress Within The Tool, and Has An Appealing, Easy-To-Identify Gold Color. Gold Oxide Is Commonly Used To Identify Cobalt Steel Tools. Spiral Flutes Act As a Passageway For Chip Extraction From The Hole and For Coolant To Enter The Hole. Right-Hand Twist Brings Chips Up And Away From The Cutting Edge. The Morse Taper Is A Shank That Is Tapered From One End To Another. The Taper Of The Tool Fits Into The Taper Of The Tool-Holder. The Friction Between The Surfaces Provides a Secure Holding Systems And Accurate Placement Of The Tool. A Drift Pin Is Knocked Into The Slot At The Tang To Remove The Tool.