Kennametal 4150263 Screw Machine Drill Bit 11/32 in Carbide

Product Description

The KENNAMETAL 4150263 is a solid carbide screw machine length (stub) drill bit designed for high-performance drilling in metalworking and machining applications. Built to DIN 6537K standards, it features a 140-degree split point for accurate centering and reduced thrust, a multilayer TiAlN coating at the tip for heat resistance and extended tool life, and a straight cylindrical shank measuring 10.00 mm in diameter. The 11/32 inch (0.3438 inch) cutting diameter and compact 3.504 inch overall length make it well suited for high-cycle production drilling environments. Installation and operation are performed by machinists and tool room technicians.

This drill bit is intended for stub-length drilling operations where rigidity and controlled depth are priorities. The reduced flute length of 1.850 inches limits deflection and improves hole quality in tight fixturing setups. The regular spiral flute geometry and right-hand cutting direction are standard for conventional CNC machining centers, drill presses, and automated drilling equipment. A maximum drilling depth of 1.378 inches (35.00 mm) makes it appropriate for through-holes and moderate-depth blind holes in metals and hard alloys.

Key Features

• Solid carbide construction for rigidity and wear resistance in metalworking applications
• TiAlN tip coating resists high cutting temperatures and extends tool life between changes
• 140-degree standard point angle reduces walking and improves self-centering on entry
• DIN 6537K specification ensures dimensional consistency for toolholder compatibility
• Straight cylindrical shank fits standard drill chucks and collet holders without modification
• Tapered web configuration maintains core strength across the flute length

Compatibility

Designed as an OEM-style replacement and standard tooling option for CNC machining centers, drill presses, and automated drilling equipment accepting straight-shank drill bits in the 11/32 inch size range. Part of the KENNAMETAL Series B041A-CPG stub drill line.

Installation Notes

This drill bit is installed and operated by machinists or toolroom technicians familiar with carbide tooling practices. Ensure the spindle is fully stopped and the machine is locked out before changing tooling. Carbide tooling is brittle — do not drop or subject the bit to lateral shock loads, as chipping or fracture can result. Confirm shank-to-holder runout meets machine tolerances before beginning a production run.