Kennametal 4150635 Jobber Drill 1/8 Inch Solid Carbide

Product Description

The KENNAMETAL 4150635 is a solid carbide jobber-length drill bit designed for high-performance drilling in demanding production environments. It features a 140-degree split point geometry that improves self-centering and reduces thrust force compared to standard 118-degree points. The multilayer TiAlN coating adds heat resistance and extends tool life when drilling abrasive or hard materials. At 1/8 inch (0.1250 inch) diameter, this bit is suited for precision hole-making in tight-tolerance applications. A right-hand cutting direction and regular spiral flute geometry promote efficient chip evacuation. Licensed tradespeople and machinists in metal fabrication, maintenance, and production settings are the primary users of this tool.

This jobber drill is intended for use on steel, stainless steel, cast iron, aluminum, and non-ferrous materials. The 0.1250 inch diameter and 1.1024 inch flute length make it well suited for drilling shallow to moderate-depth holes in components where hole quality and dimensional accuracy matter. The whistle notch shank provides a positive retention point in drill chucks equipped to accept it, reducing the risk of shank slip under torque. This bit fits typical jobber-drill applications in CNC machining centers, drill presses, and handheld power tools used in industrial and maintenance trades.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard and abrasive workpiece materials
• Multilayer TiAlN coating improves heat resistance and extends cutting tool life
• 140-degree point angle promotes self-centering and reduces walking on entry
• Whistle notch shank provides positive chuck retention and resists rotational slip
• Right-hand regular spiral flute geometry supports efficient chip evacuation
• No coolant-through design simplifies setup on standard drill presses and handheld equipment

Compatibility

Designed as a high-performance replacement jobber drill for applications in steel, stainless steel, cast iron, aluminum, and non-ferrous materials where a 1/8 inch diameter carbide bit with a whistle notch shank is specified.

Installation Notes

Installation and use of this tool should be performed by a qualified machinist or trade professional familiar with carbide tooling. Before mounting, ensure the drill press or machine spindle is fully de-energized and locked out per applicable safety procedures. Verify the chuck is rated for the whistle notch shank style and that runout is within acceptable limits before drilling, as excessive runout can chip carbide cutting edges. Carbide tooling is brittle and should not be subjected to side loading or used to ream existing holes.