Kennametal 4149157 Carbide Jobber Drill 2.50mm 140 Deg

Product Description

The KENNAMETAL 4149157 is a solid carbide jobber-length drill designed for high-performance hole-making in ferrous and non-ferrous materials. It measures 2.50 mm in diameter with a 140-degree point angle and a multilayer TiAlN coating that extends tool life in demanding applications. The overall length is 58.00 mm (2.2835 inches), with a straight cylindrical shank of 4 mm (0.2500 inches) in diameter. Two regular spiral flutes evacuate chips efficiently, and coolant-through capability supports deep-hole drilling strategies. This drill is intended for use by machinists and tool-and-die professionals working on CNC machining centers or precision drilling fixtures.

This drill is suited for production and job-shop environments where tight tolerances and consistent hole quality are required. It performs in steel, stainless steel, cast iron, aluminum, and other non-ferrous materials. The 5xD flute-to-diameter ratio and a maximum drilling depth of 17.00 mm (0.6693 inches) make it appropriate for through-holes and blind holes in short-to-medium depth applications. It conforms to DIN 6537K specifications, making it a direct fit for standard toolholders and collets designed to that standard.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard materials
• Multilayer TiAlN coating reduces heat buildup and extends cutting life
• 140-degree point angle reduces thrust and improves centering on entry
• Coolant-through design supports chip evacuation in deep or interrupted cuts
• Right-hand cut, regular spiral flute for standard CNC and manual drilling operations
• Meets DIN 6537K specification for dimensional consistency and toolholder compatibility

Compatibility

Designed for use with standard straight-shank collet chucks and toolholders accepting a 4 mm (0.2500 inch) shank diameter per DIN 6537K. Compatible with steel, stainless steel, cast iron, aluminum, and non-ferrous workpiece materials as noted in the product specifications.

Installation Notes

Installation and operation should be performed by qualified machinists familiar with CNC or manual drilling equipment. Ensure the machine spindle and toolholder are clean and free of runout before seating the drill. Power down and de-energize the machine before changing tooling. Do not exceed the rated maximum drilling depth of 17.00 mm without evaluating chip load and coolant delivery, as carbide tooling is brittle and sensitive to deflection or interrupted cuts without proper support.