Kennametal 4150651 Jobber Drill Bit No. 21 Solid Carbide

Product Description

The KENNAMETAL 4150651 is a solid carbide jobber-length drill bit sized to No. 21 wire gauge (0.1590 inches), designed for high-performance drilling in ferrous and non-ferrous materials. It features a 140-degree split-point geometry for fast, accurate hole entry and reduced thrust. The multilayer TiAlN coating delivers elevated heat resistance and edge life under demanding cutting conditions. At 2.9134 inches overall length with a 1.4173-inch flute length, this is a compact, rigid tool suited for CNC machining centers, drill presses, and production drilling environments. It is installed and used by machinists, toolroom technicians, and fabrication professionals.

This drill bit is built for cutting steel, stainless steel, cast iron, aluminum, and other non-ferrous workpiece materials. The 5xD flute-to-diameter ratio and regular spiral flute configuration make it a reliable choice for general production drilling where consistent hole quality and tool longevity are required. The straight cylindrical shank at 0.3750 inches (6 mm) fits standard drill chucks and collet systems. Conforming to DIN 6537K, this tool is appropriate for both shop-floor production runs and maintenance machining applications.

Key Features

• Solid carbide construction for rigidity and wear resistance in tough materials
• 140-degree point angle for aggressive entry and reduced walking on hard surfaces
• Multilayer TiAlN coating extends tool life at elevated cutting temperatures
• Right-hand cutting, regular spiral flute with tapered web configuration
• No. 21 wire size (0.1590 inches) with tight diameter tolerance of -0.0005 to 0.0000 inches
• Conforms to DIN 6537K specification for consistent dimensional standards

Compatibility

Designed as a DIN 6537K-compliant solid carbide jobber drill for use in steel, stainless steel, cast iron, aluminum, and non-ferrous workpiece materials. Fits any standard drill chuck or collet accepting a 0.3750-inch straight cylindrical shank.

Installation Notes

This tool is installed by machinists and toolroom technicians in CNC or manual drilling equipment. Ensure the spindle and workpiece are properly secured before operation. Solid carbide tooling is brittle and should not be used in setups with excessive runout or unsupported workpieces, as chipping or breakage can result. Follow machine tool manufacturer guidelines and applicable shop safety procedures when setting speeds and feeds for carbide tooling.