Kennametal 4151233 Drill Bit 31/64 in Solid Carbide 140 Deg

Product Description

The KENNAMETAL 4151233 is a screw machine length (stub length) drill bit designed for high-performance drilling in metal fabrication, machining, and industrial applications. Built from solid carbide with a multilayer TiAlN coating at the tip, this bit delivers superior wear resistance and thermal stability at elevated cutting speeds. The 140-degree split point reduces thrust force and improves self-centering, minimizing the need for a center punch. At 4.2126 inches overall length with a 2.3622-inch flute length, it is engineered for rigidity in short-reach drilling setups. Licensed machinists, tool-and-die makers, and CNC operators are the primary users of this tooling.

This drill bit suits precision hole-making in ferrous and non-ferrous metals where tight tolerances and surface finish matter. The straight cylindrical shank at 14.00 mm (0.5512 inches) diameter seats securely in standard drill chucks or collet holders on machining centers, drill presses, and CNC mills. The regular spiral flute geometry and tapered web configuration support efficient chip evacuation. Coolant-through capability makes this bit compatible with through-spindle coolant systems, extending tool life in deep-hole or high-feed applications. It conforms to DIN 6537K specification.

Key Features

• Solid carbide construction for extended tool life in abrasive and hard materials
• TiAlN coating at tip provides thermal barrier and reduced friction at the cutting edge
• 140-degree point angle self-centers and reduces entry burr
• Coolant-through design compatible with through-spindle coolant systems
• Straight cylindrical shank fits standard chucks and collet toolholders without adapters
• DIN 6537K specification ensures dimensional conformance for interchangeable tooling
• Drill bit diameter tolerance of -0.0007 to 0.0000 inches for consistent hole sizing

Compatibility

Designed as a stub-length carbide drill conforming to DIN 6537K, this bit fits any drill chuck or collet holder accepting a 0.5512-inch straight cylindrical shank. It is suited for use on CNC machining centers, manual drill presses, and multi-spindle machines configured for through-spindle coolant delivery.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the machine spindle is fully stopped and the control is in an e-stop or lock-out state before changing tooling. Seat the shank fully and evenly in the collet or chuck, and verify runout before beginning a production cut. Do not use this bit in handheld drill applications — it is intended for rigid machine spindle use only.