Kennametal 4150244 Solid Carbide Drill Bit 7.30 Mm

Product Description

The KENNAMETAL 4150244 is a screw machine length (stub) drill bit engineered for high-performance drilling in metalworking and machining applications. Built from solid carbide with a multilayer TiAlN coating, this bit delivers superior wear resistance and heat dissipation compared to HSS alternatives. The 140-degree split point reduces thrust and walking at entry, making it well-suited for CNC machining centers and drill presses running at elevated speeds and feeds. At 7.30 mm in diameter with an overall length of 79.00 mm, the compact stub-length geometry provides added rigidity and improved hole accuracy in short-reach drilling operations. Licensed machinists and tooling specialists are the primary installers and users.

This drill bit is designed for stub-length drilling applications where rigidity and concentricity are critical. It suits production environments drilling steel, stainless steel, cast iron, and similar ferrous materials. The straight-cylindrical shank at 8.00 mm diameter fits standard ER and straight-bore collet chucks commonly used in CNC machining centers, drill presses, and screw machines. The 3xD flute-to-diameter ratio supports controlled chip evacuation in moderate-depth holes up to 29.00 mm. It conforms to DIN 6537K specification, making it a direct fit in shops running metric tooling standards.

Key Features

• Solid carbide construction for hardness and wear resistance in demanding metalworking applications
• Multilayer TiAlN coating with TiN tip for extended tool life and reduced built-up edge
• 140-degree standard point angle minimizes entry thrust and reduces drill walk
• Stub length design increases rigidity for improved hole straightness and diameter accuracy
• Tapered web configuration supports chip evacuation and reduces cutting torque
• Conforms to DIN 6537K specification for dimensional consistency in metric tooling setups

Compatibility

Designed as an OEM-style solid carbide stub drill conforming to DIN 6537K, compatible with standard straight-bore and ER collet chucks accepting an 8.00 mm shank diameter. Part of the Kennametal B041A-CPG series.

Installation Notes

Installation should be performed by a qualified machinist or tooling specialist. Ensure the machine spindle is fully stopped and locked out before inserting or removing the bit from the collet chuck. Verify that chuck runout meets the tolerance requirements for the application before beginning production drilling. Do not exceed the rated maximum drilling depth of 29.00 mm without retracting to clear chips.