Walter-titex 6618391 Solid Carbide Jobber Drill 0.4060 in

Product Description

The WALTER-TITEX 6618391 is a solid carbide jobber-length drill bit engineered for high-performance hole-making in demanding industrial and machining applications. Designed with a 140-degree split point and a TiAlN (Titanium Aluminum Nitride) coating, this bit delivers aggressive cutting action while resisting heat buildup at the tool tip. It measures 0.4060 inches in diameter with an overall length of 4.6457 inches and a flute length of 2.0300 inches. The right-hand spiral flute geometry and whistle notch shank work together to ensure secure tool-holder engagement and consistent chip evacuation in both through-coolant and dry setups. Machinists and tooling professionals specify this drill for precision work requiring tight diameter tolerances.

This drill bit is suited for production machining environments where blind hole drilling and stack drilling operations are common. Primary workpiece materials include steel, cast iron, aluminum, and other non-ferrous metals, making it versatile across job shops, aerospace component work, and general metalworking applications. The 5xD flute-to-diameter ratio supports moderate-depth holes without excessive deflection. Coolant-through capability allows internal cutting fluid delivery, extending tool life in continuous or high-feed operations. It is sold individually and is compatible with toolholders accepting a 0.4720-inch shank diameter.

Key Features

• Solid carbide construction for hardness and wear resistance in ferrous and non-ferrous materials
• TiAlN coating reduces friction and extends tool life in high-temperature cutting conditions
• 140-degree proprietary point geometry reduces thrust force and improves hole entry accuracy
• Coolant-through design supports internal fluid delivery for deep or high-feed drilling
• Whistle notch shank provides positive tool-holder seating and prevents slippage under load
• Suitable for blind hole and stack drilling applications per Series DC150 design intent

Compatibility

Designed for use with toolholders accepting a 0.4720-inch shank diameter. Rated for primary workpiece materials including steel, cast iron, aluminum, and non-ferrous metals (material codes K, N, P, S). Conforms to ANSI and ISO standards per Series DC150 specification.

Installation Notes

Installation and use should be performed by qualified machinists or tooling technicians familiar with CNC or manual drilling equipment. Ensure the toolholder is properly torqued and that the whistle notch is fully seated before operation. Verify spindle speed and feed rate against the material and drill diameter before starting a cut. Disconnect machine power and follow lockout-tagout procedures before changing or inspecting tooling.