Kennametal 4169251 Extra Length Drill Bit 5.3mm Carbide

Product Description

The KENNAMETAL 4169251 is a solid carbide extra length drill bit designed for precision drilling in demanding industrial and machining applications. It measures 5.3 mm (0.2087 inches) in diameter with a 125 mm overall length and an 84 mm flute length, giving it a 12xD flute-to-diameter ratio suited for deep-hole work. The 135-degree standard point geometry reduces walking and allows for efficient chip evacuation. A multilayer TiAlN coating provides heat and wear resistance during high-speed cutting operations. This bit is installed and used by machining professionals, tool-and-die technicians, and CNC operators working with precision metalworking equipment.

This drill bit is built for production drilling in metals and other hard materials where extended reach and tight tolerances are required. The B269-HP series designation indicates a high-performance geometry optimized for consistent hole quality at depth. Coolant-through capability supports chip flushing and thermal management during deep drilling cycles, making it appropriate for CNC machining centers and automated drilling operations in manufacturing environments.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard materials
• Multilayer TiAlN coating extends tool life under high-speed, high-heat conditions
• 135-degree standard point angle reduces entry walking and improves centering accuracy
• Coolant-through design supports internal chip evacuation and heat management in deep holes
• 12xD flute-to-diameter ratio enables drilling up to 71 mm maximum depth
• Straight-cylindrical shank with 6 mm diameter fits standard collets and drill chucks
• Right-hand spiral flute with tapered web configuration for efficient chip flow

Compatibility

Designed as an OEM-style replacement or direct-fit tooling solution for CNC machining centers and drill presses accepting a straight-cylindrical 6 mm shank in the B269-HP series.

Installation Notes

Installation and use should be performed by qualified machinists or tooling technicians familiar with CNC or manual drilling equipment. Ensure the machine spindle and collet or chuck are fully de-energized and locked out before inserting or changing tooling. Verify shank seating depth and runout before initiating a drilling cycle. Follow applicable ANSI and shop-floor safety standards for rotating cutting tools and coolant systems.