Kennametal 4149406 Solid Carbide Jobber Drill 47/64 Inch

Product Description

The KENNAMETAL 4149406 is a solid carbide jobber-length drill bit designed for demanding production drilling applications. It features a 47/64 inch (0.7344 inch) diameter, a 140-degree split-point geometry, and a multilayer TiAlN coating that extends tool life in high-heat cutting environments. The right-hand spiral flute design promotes efficient chip evacuation, and the straight cylindrical shank provides positive clamping in standard drill chucks and collet holders. With an overall length of 6.0236 inches and a flute length of 3.9764 inches, this drill is suited for through-hole and deep-hole operations. It is installed and used by machinists, tool-and-die technicians, and CNC operators in production and job-shop environments.

This drill is rated for use in steel, stainless steel, cast iron, aluminum, and non-ferrous materials, making it a versatile choice across a wide range of workpiece materials. The 5xD flute-to-diameter ratio supports a maximum drilling depth of 3.0315 inches (77.00 mm). Coolant-through capability allows internal delivery of cutting fluid directly to the cutting zone, which is particularly valuable when drilling stainless steel or cast iron at high feed rates. The drill conforms to DIN 6537K specification, aligning with internationally recognized dimensional and tolerance standards common in precision machining facilities.

Key Features

• 47/64 inch (0.7344 inch) diameter with a tight tolerance of -0.0008 to 0.0000 inches for consistent hole sizing
• 140-degree standard point angle reduces thrust force and improves self-centering on flat and curved surfaces
• Solid carbide construction provides rigidity and heat resistance superior to high-speed steel alternatives
• Multilayer TiAlN coating improves wear resistance and thermal stability at elevated cutting speeds
• Coolant-through design delivers cutting fluid internally to the drill tip for thermal management and chip flushing
• Conforms to DIN 6537K specification with a tapered web configuration and regular spiral flute geometry

Compatibility

Designed for use in steel, stainless steel, cast iron, aluminum, and non-ferrous workpiece materials. The straight cylindrical shank is compatible with standard drill chucks and ER-style collet systems sized to accept a 0.7344 inch shank diameter. Conforms to DIN 6537K dimensional standards.

Installation Notes

This drill bit is installed by machinists and CNC operators using standard tool-holding equipment; ensure the shank is fully seated and the holder is torqued to the machine manufacturer's specification before operation. Confirm spindle RPM and feed rate are appropriate for the workpiece material and diameter before initiating the cut. When using the coolant-through feature, verify that the machine spindle and toolholder are rated for internal coolant delivery and that coolant pressure is set per machine guidelines. Inspect the cutting edges and coating condition before each use and remove the drill from service if chipping or coating degradation is observed.