Kennametal 4151107 Screw Machine Drill Bit 3.40mm Carbide

Product Description

The KENNAMETAL 4151107 is a stub-length screw machine drill bit designed for high-precision drilling in demanding production environments. Built from solid carbide and coated with a multilayer TiAlN finish at the tip, this bit delivers extended tool life in hardened steels, cast iron, and other abrasive workpiece materials. It features a 140-degree point angle for reduced thrust and improved centering, a 2-flute regular spiral configuration, and a straight cylindrical shank measuring 6.00 mm in diameter. Overall length is 62.00 mm (2.4409 inches). The tapered web construction adds rigidity while maintaining chip evacuation. Coolant-through capability is supported, making it well-suited for automated or CNC machine tool setups where through-spindle coolant is available.

This drill bit is intended for use in screw machine operations, CNC machining centers, and production drilling applications where tight tolerances and repeatability are required. With a drill diameter of 3.40 mm (0.1339 inches) and a maximum drilling depth of 14.00 mm (0.5512 inches), it fits applications calling for stub-length rigidity over extended reach. The B051A-CPG series designation confirms this is a production-grade carbide stub drill built to DIN 6537K standards. Machinists, toolroom technicians, and CNC operators in metalworking shops are the primary installers and users of this tool.

Key Features

• Solid carbide construction for high wear resistance in ferrous and abrasive materials
• TiAlN multilayer coating at the tip extends tool life under elevated cutting temperatures
• 140-degree point angle reduces axial thrust and improves self-centering on entry
• Coolant-through design compatible with through-spindle coolant delivery systems
• Tapered web configuration adds core strength while supporting chip flow
• Manufactured to DIN 6537K specification for dimensional consistency

Compatibility

Designed as a production-grade stub-length drill bit for use in CNC machining centers, screw machines, and any machine tool spindle accepting a 6.00 mm straight cylindrical shank. Conforms to DIN 6537K dimensional standards.

Installation Notes

Installation and use of this tool should be performed by a qualified machinist or CNC operator. Ensure the machine spindle is fully powered down and locked out before inserting or removing the bit from the tool holder. Verify shank seating and runout with appropriate gauging before initiating a cut. Do not exceed the rated maximum drilling depth of 14.00 mm per pass without confirmed chip clearance.