Kennametal 4149240 Jobber Drill 7mm Solid Carbide 140 Deg

Product Description

The KENNAMETAL 4149240 is a solid carbide jobber-length drill bit designed for high-performance drilling in demanding production environments. It measures 7.00 mm in diameter with an overall length of 91.00 mm (3.5827 inches) and features a 140-degree split-point geometry for accurate self-centering entry and reduced thrust. The multilayer TiAlN coating extends tool life by resisting heat buildup at elevated cutting speeds. With two regular spiral flutes and a flute-to-diameter ratio of 5xD, this drill moves chips efficiently while maintaining hole quality. Coolant-through capability supports deep-hole applications and helps manage heat in difficult materials. It conforms to DIN 6537K specification.

This drill is intended for machining steel, stainless steel, cast iron, aluminum, and other non-ferrous metals. It is suited to CNC machining centers, drill presses, and automated production cells where consistent hole tolerances are required. The straight cylindrical shank seats in standard collet chucks and hydraulic toolholders without modification. Maximum drilling depth is 43.00 mm (1.6929 inches), making it appropriate for through-holes and moderate-depth blind holes in structural and fabricated components.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard and abrasive materials
• Multilayer TiAlN coating for heat resistance and extended tool life at high cutting speeds
• 140-degree point angle for accurate entry and reduced walking on flat or curved surfaces
• Coolant-through design to flush chips and control heat in deep-hole operations
• DIN 6537K specification for consistent dimensional interchangeability
• Diameter tolerance of -0.0006 to 0.0000 inches for tight, repeatable hole sizing

Compatibility

Designed for use in CNC machining centers and drill presses with standard straight-shank collet chucks or hydraulic toolholders accepting an 8.00 mm shank diameter. Primary workpiece materials include steel, stainless steel, cast iron, aluminum, and non-ferrous alloys.

Installation Notes

Installation and tool changes should be performed by qualified machinists or toolroom personnel following shop safety procedures. Ensure the machine spindle is fully stopped and locked out before mounting or removing the drill. Seat the straight shank fully in the collet or chuck and torque the retention mechanism to the toolholder manufacturer's specification. Verify coolant-through passages are clear and coolant flow is active before starting the cut in deep-hole applications.