Kennametal 4169249 Extra Length Drill Bit 5.1mm Carbide

Product Description

The KENNAMETAL 4169249 is a solid carbide extra length drill bit designed for precision drilling in demanding metal-cutting applications. It measures 5.1 mm in diameter with a 125 mm overall length and an 83 mm spiral flute length, providing extended reach for deep-hole operations. The multilayer TiAlN coating improves heat and wear resistance, making this bit effective in high-speed dry and near-dry machining. A 135-degree standard point angle reduces thrust and centers the drill without a pilot hole. This tool is typically installed and operated by machinists and CNC tool-room technicians working in production or precision job-shop environments.

The 4169249 is suited for drilling operations requiring depth-to-diameter ratios up to 12xD, with a maximum drilling depth of 70 mm. Its straight-cylindrical shank at 6 mm diameter seats directly into standard collet chucks and drill sleeves without adapters. The right-hand spiral with tapered web configuration supports efficient chip evacuation in ferrous and non-ferrous materials. Coolant-through capability allows internal delivery of cutting fluid to the drill tip, reducing heat buildup in deep-hole passes. This bit is part of the KENNAMETAL Series B269-HP, a high-performance carbide drill line built to DIN specification.

Key Features

• Multilayer TiAlN coating for elevated heat and abrasion resistance in high-speed cutting
• 135-degree standard point angle reduces entry thrust and improves self-centering
• Coolant-through design delivers fluid directly to the cutting zone for deep-hole operations
• 12xD flute-to-diameter ratio supports drilling depths up to 70 mm
• Straight-cylindrical 6 mm shank fits standard collet chucks without special toolholders
• Tapered web with regular right-hand spiral promotes positive chip evacuation

Compatibility

Designed as an OEM-style replacement or direct-fit tool for applications requiring a 5.1 mm solid carbide extra length drill in Series B269-HP per DIN specification. Fits any standard collet or drill chuck accommodating a 6 mm straight-cylindrical shank.

Installation Notes

This drill bit is intended for use by qualified machinists operating CNC machining centers, drill presses, or manual milling machines with appropriate workholding. Ensure the spindle and coolant system are fully powered down before changing tooling. Seat the shank fully and evenly in the collet or chuck to the specified grip length before tightening. When enabling coolant-through function, verify the machine spindle and tool holder support internal coolant delivery before pressurizing the system.