Kennametal 4151237 1/2 Inch Carbide Screw Machine Drill Bit

Product Description

The KENNAMETAL 4151237 is a solid carbide screw machine length drill bit designed for high-performance drilling in demanding production environments. With a 1/2 inch cutting diameter and a 140-degree split point, this bit delivers fast penetration and accurate entry without center-punching. The multilayer TiAlN coating reduces heat buildup and extends tool life in ferrous and non-ferrous materials. It features a straight cylindrical shank, right-hand cutting direction, and two regular spiral flutes. Licensed machinists and toolroom technicians rely on this bit for short-setup, high-cycle drilling applications where dimensional accuracy and repeatability are critical.

This stub-length drill bit is suited for CNC machining centers, drill presses, and screw machine operations where reduced overhang and improved rigidity are required. The 3xD flute-to-diameter ratio and tapered web configuration support chip evacuation in short-hole drilling. Coolant-through capability allows internal delivery of cutting fluid directly to the cutting edge, making it effective in deep pockets relative to its stub length. It is a fit for production drilling in automotive, aerospace, and general metalworking applications.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard materials
• Multilayer TiAlN coating with TiN tip for extended tool life and heat resistance
• 140-degree standard point angle for fast, self-centering entry
• Coolant-through design delivers cutting fluid internally to the cutting zone
• Straight cylindrical shank compatible with standard collet and drill chuck toolholding
• Conforms to DIN 6537K specification for consistent dimensional standards

Compatibility

Designed as an OEM-style replacement or direct-fit drill bit for applications conforming to DIN 6537K stub-length standards; compatible with toolholders and collets sized for a 0.5512 inch straight shank diameter in Series B051A-CPG configurations.

Installation Notes

Installation and tooling setup 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 toolholder. Verify collet or chuck concentricity before use, as runout directly affects hole tolerance and tool life. Do not use this bit beyond its rated maximum drilling depth of 1.6929 inches without retracting for chip clearance.