Kennametal 4148849 Screw Machine Drill Bit 2.60mm Carbide

Product Description

The KENNAMETAL 4148849 is a screw machine length (stub-length) drill bit designed for high-precision drilling in metal and hard materials. Built from solid carbide and coated with a multilayer TiAlN finish at the tip, the bit delivers extended tool life and heat resistance at elevated cutting speeds. The 140-degree split point reduces thrust force and improves centering without a pilot hole. At 2.2835 inches overall length with a 0.6693-inch flute length, this compact geometry fits short-reach setups common in CNC machining centers and screw machine applications. Licensed machinists and toolroom technicians are the primary users.

This drill bit suits production drilling in ferrous metals, stainless steels, and cast alloys where a stub-length tool is preferred for rigidity. The 3xD flute-to-diameter ratio and tapered web configuration keep chip evacuation efficient at shallow depths up to 0.4724 inches. Its straight cylindrical shank fits standard drill chucks and collet holders without modification, making it compatible with a broad range of CNC turning centers, machining centers, and gang-drill fixtures used in high-volume screw machine work.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard and abrasive materials
• Multilayer TiAlN coating at the tip for thermal protection and extended tool life
• 140-degree point angle for self-centering entry and reduced thrust force
• Coolant-through design supports internal coolant delivery to the cutting zone
• Tapered web configuration promotes efficient chip evacuation in stub-depth holes
• Conforms to DIN 6537K specification for dimensional consistency

Compatibility

Designed for use in the KENNAMETAL B051A-CPG series. The straight cylindrical shank is compatible with standard drill chucks and collet holders sized for a 4.00 mm (0.1575 inch) shank diameter across CNC and manual machine tool platforms.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the machine powered down and all motion stopped. Ensure the collet or chuck is clean and properly torqued before running. Coolant-through capability requires a compatible spindle coolant system to be active if internal coolant is desired. Do not use this bit in hand-held drill applications; it is designed for rigid machine tool spindles only.