Kennametal 4150252 5/16 Inch Carbide Stub Drill Bit

Product Description

The KENNAMETAL 4150252 is a screw machine (stub) length solid carbide drill bit designed for high-performance drilling in metalworking and machining applications. Built to DIN 6537K standards, it features a 140-degree point angle for aggressive cutting and reduced thrust, a multilayer TiAlN coating for heat and wear resistance, and a right-hand spiral flute geometry. The overall length is 3.11 inches with a flute length of 1.61 inches, making it well-suited for rigid, close-tolerance work in CNC and conventional machine tool setups. It weighs 0.1 pounds and is sold individually.

This drill bit is used in production machining environments where stub-length rigidity is needed to hold tight tolerances in ferrous metals, stainless steels, cast iron, and similar materials. The 3xD flute-to-diameter ratio and tapered web configuration support chip evacuation in short-depth holes. Maximum drilling depth is 1.14 inches. Typical applications include automotive, aerospace, and general metal fabrication shops running multi-spindle or CNC drilling operations.

Key Features

• Solid carbide construction for high hardness and wear resistance in demanding materials
• TiAlN coating applied at tip for elevated heat resistance and extended tool life
• 140-degree point angle reduces thrust and improves hole entry accuracy
• Stub length design increases rigidity and reduces deflection in short-depth holes
• Straight cylindrical shank compatible with standard drill chucks and collets
• DIN 6537K specification for consistent dimensional compliance

Compatibility

Designed as a stub-length replacement drill bit for CNC machining centers, drill presses, and multi-spindle machines accepting a straight cylindrical shank with a 0.315-inch shank diameter. Compatible with Series B041A-CPG tooling configurations.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the spindle fully stopped and machine power locked out per applicable safety procedures. Verify chuck or collet runout before seating the shank to avoid premature edge wear. Carbide tooling is brittle and should not be dropped or used to pry. Confirm drilling depth does not exceed the maximum rated depth of 1.14 inches for this stub-length geometry.