Kennametal 4151229 Carbide Drill Bit 12mm 140 Deg

Product Description

The KENNAMETAL 4151229 is a screw machine length (stub length) solid carbide drill bit designed for high-productivity drilling in ferrous and non-ferrous materials. The bit features a multilayer TiAlN coating with a TiN tip, a 140-degree point angle, and a right-hand cutting direction with a regular spiral flute. At 4.0157 inches overall length and 12.00 mm in diameter, this compact drill fits standard straight-shank toolholders and is well suited for applications where rigidity and chip evacuation are critical. Coolant-through capability supports higher feed rates and extended tool life in production environments. This bit is installed and used by machinists and CNC tooling professionals.

This drill bit is built for stub-length drilling applications in machining centers, CNC mills, and drill presses where minimal overhang reduces deflection. The 3xD flute-to-diameter ratio and 40.00 mm maximum drilling depth make it appropriate for through-hole and blind-hole operations in steel, cast iron, aluminum, and similar materials. The DIN 6537K specification ensures dimensional consistency for toolcrib standardization. Series B051A-CPG identifies the Kennametal product family for this geometry and coating combination.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard materials
• Multilayer TiAlN coating with TiN tip for heat resistance and extended cutting life
• 140-degree point angle reduces thrust force and improves centering
• Coolant-through design supports high feed rates and deep-hole chip flushing
• Straight-cylindrical shank with 12.00 mm diameter fits standard collets and chucks
• DIN 6537K specification for dimensional interchangeability

Compatibility

Designed as a DIN 6537K stub-length drill for use in standard 12.00 mm straight-shank toolholders, collet chucks, and hydraulic chucks on CNC machining centers and drill presses. Compatible with the Kennametal B051A-CPG series tooling family.

Installation Notes

This bit is installed by machinists and CNC tooling technicians. Always de-energize and lock out the machine before changing tooling. Confirm the shank diameter matches the collet or chuck bore before seating. Verify coolant-through lines are clear and properly connected before running at elevated feed rates. Follow the machine manufacturer guidelines and applicable shop safety codes when setting speeds and feeds.