Kennametal 4042546 Screw Machine Drill Bit Size 36

Product Description

The KENNAMETAL 4042546 is a screw machine length (stub length) solid carbide drill bit designed for high-performance drilling in demanding production environments. Measuring 0.1065 inches (wire size 36) in diameter with an overall length of 1.9685 inches, it features a 140-degree standard point angle that promotes self-centering and reduces thrust force at entry. The multilayer TiAlN coating extends tool life in ferrous and heat-resistant alloys by reducing heat transfer into the carbide substrate. With two regular spiral flutes and a tapered web configuration, the 4042546 delivers efficient chip evacuation across a maximum drilling depth of 0.4331 inches. Coolant-through capability supports high-speed and dry machining strategies.

This drill bit is suited for screw machine operations, CNC machining centers, and automated drilling cells where stub-length rigidity reduces deflection in short-reach applications. The straight cylindrical shank with a 0.1181-inch diameter seats securely in standard collets and drill chucks. It is appropriate for machining steel, stainless steel, cast iron, and similar materials in both job shop and high-volume production settings. Installation and operation are handled by machinists and CNC setup technicians following standard tooling protocols.

Key Features

• Solid carbide construction provides rigidity and wear resistance beyond high-speed steel alternatives
• Multilayer TiAlN coating reduces friction and extends tool life in ferrous and heat-resistant alloys
• 140-degree point angle promotes accurate self-centering and clean entry
• Coolant-through design supports both wet and high-pressure coolant strategies
• Tapered web configuration aids chip clearance and reduces walking at entry
• Stub length flute geometry (flute length 0.6299 inches) maximizes stiffness and minimizes deflection

Compatibility

Designed as a direct-fit replacement or standard tooling selection for applications requiring a wire size 36 (0.1065-inch) stub-length carbide drill bit with a straight shank, conforming to DIN 6537K specification. Compatible with any drill chuck or collet system accepting a 0.1181-inch straight cylindrical shank.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Ensure the machine spindle is fully stopped and the tool changer or quill is in a safe position before seating or removing the bit. Verify collet or chuck bore size matches the 0.1181-inch shank diameter to prevent runout. Do not exceed the manufacturer-rated drilling depth of 0.4331 inches per pass without pecking cycles when drilling blind holes.