Kennametal 4150197 Screw Machine Drill Bit 4.20mm Carbide

Product Description

The KENNAMETAL 4150197 is a stub-length (screw machine length) drill bit engineered for high-performance drilling in demanding production environments. Built from solid carbide and finished with a multilayer TiAlN coating, this bit delivers the hardness and thermal resistance needed for tight-tolerance hole making in ferrous metals, cast iron, hardened steels, and similar materials. The 140-degree split-point geometry reduces thrust force and improves centering without a pilot hole. Overall length is 66.00 mm (2.5984 inches), with a right-hand spiral flute configuration and a straight cylindrical shank. Licensed machinists, tool-and-die techs, and CNC operators are the typical end users.

This drill bit is suited for screw machine operations, CNC machining centers, drill presses, and multi-spindle production setups where shorter flute length and maximum rigidity are priorities. The 4.20 mm cutting diameter and 6.00 mm shank diameter fit standard collets and drill chucks common to production floor equipment. Maximum drilling depth is 17.00 mm (0.6693 inches), consistent with its 3xD flute-to-diameter ratio. The Series B041A-CPG designation identifies this bit within the KENNAMETAL stub drill family, which is designed for precision work in tight axial clearance situations.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard materials
• Multilayer TiAlN coating reduces friction and extends tool life at elevated cutting temperatures
• 140-degree standard point angle for reduced entry thrust and self-centering performance
• Stub (screw machine) length body minimizes deflection and improves hole straightness
• Tapered web configuration adds core strength along the flute length
• Straight cylindrical shank compatible with standard collet chucks and drill press quills
• Conforms to DIN 6537K specification for dimensional consistency

Compatibility

Designed as an OEM-specification replacement drill bit for production machining applications requiring a 4.20 mm diameter solid carbide stub drill with a straight shank, conforming to DIN 6537K. Fits standard 6.00 mm collet and drill chuck toolholding systems.

Installation Notes

Installation is performed by machinists or CNC operators following standard toolholding procedures. Secure the shank fully within the collet or chuck to the recommended engagement depth before initiating the cut. Power down and de-energize the machine spindle before changing or inspecting tooling. Do not use this bit as a reamer or apply lateral force during drilling, as solid carbide is brittle under bending loads.