Kennametal 4150243 Carbide Stub Drill Bit 7.20 Mm

Product Description

The KENNAMETAL 4150243 is a screw machine length (stub) carbide drill bit designed for precision hole-making in metalworking and machining applications. Built from solid carbide and coated with a multilayer TiAlN finish at the tip, it delivers extended tool life under demanding cutting conditions. The bit features a 140-degree split point for accurate entry and reduced thrust, a 7.20 mm cutting diameter, and a 79.00 mm overall length. With two regular spiral flutes and a straight cylindrical shank, it is suited for CNC machining centers, drill presses, and screw machine operations where short, rigid tooling is required.

This stub-length drill bit is intended for use in metal cutting environments including production machining, job shops, and maintenance operations. Its reduced flute length and rigid body make it especially effective in interrupted cuts and hard materials where longer drills would deflect. The straight shank diameter of 8.00 mm allows secure seating in standard drill chucks and collet holders. It conforms to DIN 6537K specification and falls within the B041A-CPG series from Kennametal.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard material drilling
• Multilayer TiAlN coating at the tip extends tool life and reduces heat buildup
• 140-degree standard point angle for reduced thrust and accurate hole entry
• Stub length design minimizes deflection in short-reach applications
• Right-hand cutting with regular spiral flutes for efficient chip evacuation
• Conforms to DIN 6537K specification for consistent dimensional accuracy

Compatibility

Designed as an OEM-style replacement and standard production drill bit for use in CNC machining centers, drill presses, and screw machines that accept straight cylindrical shank tooling in the 6.50 mm to 8.00 mm diameter range.

Installation Notes

This drill bit is installed and serviced by machinists and CNC operators. Secure the straight shank firmly in a compatible collet, drill chuck, or toolholder rated for the shank diameter before operation. Power down or lock out the machine spindle before changing tooling. Do not exceed the recommended maximum drilling depth of 29.00 mm in a single pass without clearing chips to prevent tool breakage.