Kennametal 4150649 Carbide Jobber Drill 5/32 Inch 140 Deg

Product Description

The KENNAMETAL 4150649 is a solid carbide jobber-length drill bit designed for high-performance drilling in demanding production environments. Measuring 5/32 inch (0.1562 inch decimal) in diameter, it features a 140-degree split point and a multilayer TiAlN coating that extends tool life at elevated cutting temperatures. The whistle notch shank provides secure chuck engagement and reduces slippage under heavy feed loads. Right-hand cutting with a regular spiral flute, this drill is sized for precision hole-making where carbide rigidity and coating hardness are required over standard HSS tooling. Licensed tradespeople and CNC machinists are the primary installers.

This drill is suited for through-hole and blind-hole applications in steel, stainless steel, cast iron, aluminum, and other non-ferrous materials. The 140-degree point geometry reduces thrust force and improves self-centering on flat and curved workpiece surfaces. With a flute length of approximately 1.42 inches and an overall length of approximately 2.91 inches, it fits standard three-jaw drill chucks and collet holders in benchtop drill presses, CNC machining centers, and hand-held power drill applications where a whistle notch shank is appropriate.

Key Features

• Solid carbide construction delivers rigidity and wear resistance beyond standard HSS drill bits
• Multilayer TiAlN coating resists heat buildup during high-speed steel and stainless steel drilling
• 140-degree point angle reduces entry thrust and improves self-centering without a center punch
• Whistle notch shank minimizes bit rotation and slippage in chuck under axial load
• Regular spiral flute promotes efficient chip evacuation in a range of workpiece materials
• Right-hand cutting configuration compatible with standard drill chucks and spindle direction

Compatibility

Designed as a high-performance OEM-style replacement jobber drill for use in standard three-jaw chucks and collet systems accepting a whistle notch shank in the 0.1500 to 0.2000 inch drill bit size range.

Installation Notes

Installation and tool changes should be performed with the machine fully powered down and the spindle at a complete stop. Secure the whistle notch shank fully into the chuck or collet holder and verify runout before initiating a cut. Solid carbide tooling is brittle and should not be used in setups with excessive vibration or workpiece movement. Follow machine manufacturer feed and speed recommendations for carbide tooling and the specific workpiece material.