Kennametal 4042542 Screw Machine Drill Bit 2.50mm Carbide

Product Description

The KENNAMETAL 4042542 is a screw machine length drill bit designed for high-performance drilling in tight-tolerance applications. Built from solid carbide and coated with a multilayer TiAlN finish, this bit delivers extended tool life in abrasive and hard materials. The 140-degree point angle reduces thrust and improves centering accuracy at entry. With an overall length of 1.97 inches (50.00 mm) and a 2.50 mm (0.0984 inch) cutting diameter, this stub-length drill fits compact toolholding setups where rigidity and precision are critical. Coolant-through capability supports high-speed drilling cycles in production environments.

This drill bit is suited for CNC machining centers, drill presses, and screw machine operations in metalworking shops, production facilities, and industrial maintenance settings. The straight cylindrical shank and compact screw machine length geometry make it appropriate for close-clearance drilling, stacked-plate work, and applications requiring consistent hole quality at small diameters. It is installed and operated by machinist and tooling professionals working with metal workpieces where cutting speed and hole accuracy are priorities.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard and abrasive materials
• Multilayer TiAlN coating reduces heat buildup and extends cutting life at higher surface speeds
• 140-degree standard point angle improves self-centering and reduces drill wander at entry
• Coolant-through design supports chip evacuation and thermal control in deep-hole drilling cycles
• Regular spiral flute geometry with tapered web for consistent chip flow
• Straight cylindrical shank fits standard collet chucks and drill bushings without modification
• Conforms to DIN 6537K specification for dimensional consistency and interchangeability

Compatibility

Designed as a DIN 6537K-compliant screw machine length carbide drill for use in standard straight-shank toolholding systems compatible with the KENNAMETAL B976Z series.

Installation Notes

Installation and operation should be performed by qualified machinists familiar with carbide tooling requirements. Ensure the machine spindle and toolholder are fully powered down and locked out before loading or changing the bit. Solid carbide drills are brittle and must be seated squarely in the collet or chuck to avoid eccentric loading, which can cause premature fracture. Verify coolant delivery is active before initiating a drilling cycle when using the coolant-through feature.