Kennametal 4151193 Carbide Drill Bit Letter U 0.368 in

Product Description

The KENNAMETAL 4151193 is a screw machine length (stub) drill bit in Letter U size, measuring 0.368 inches in diameter. It is manufactured from solid carbide and features a multilayer TiAlN coating with a TiN tip for extended tool life in demanding drilling applications. The 140-degree split point reduces thrust and improves centering accuracy at entry. With coolant-through capability and a tapered web design, this bit is built for production drilling environments where cycle time and hole quality matter. It is typically installed by machinists and toolroom technicians working on CNC machining centers or screw machines.

This drill bit is suited for high-speed, short-hole drilling operations in metalworking and precision machining environments, both job shop and production floor settings. The stub-length body limits deflection and improves rigidity in applications requiring tight positional tolerances. The straight cylindrical shank seats directly into standard collets, chucks, or hydraulic toolholders. Coolant-through channels support high-pressure through-spindle coolant delivery for chip evacuation and heat management during interrupted or deep-for-diameter cuts up to 35 mm maximum drilling depth.

Key Features

• Solid carbide construction for superior hardness and wear resistance in abrasive materials
• Multilayer TiAlN coating with TiN tip for elevated heat resistance and reduced built-up edge
• 140-degree point angle improves self-centering and reduces entry thrust
• Coolant-through design supports high-pressure spindle coolant for chip evacuation
• Stub flute length limits deflection and maximizes rigidity in short-hole applications
• Tapered web configuration adds core strength and extends tool life under high feed rates

Compatibility

Designed as an OEM-specified replacement or production tooling selection for standard straight-shank collet chucks, Weldon-style holders, and hydraulic toolholders accepting a 10 mm (0.3937 inch) shank diameter. Conforms to DIN 6537K specification.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Ensure the machine spindle is fully stopped and the toolholder is clean and free of debris before seating the shank. Verify that through-spindle coolant pressure is set according to the machine tool manufacturer specifications before engaging coolant-through flow. Do not exceed the maximum drilling depth of 35 mm without retracting to clear chips.