Kennametal 4151219 Screw Machine Drill Bit 11.20mm Carbide

Product Description

The KENNAMETAL 4151219 is a screw machine length (stub) drill bit engineered for demanding metal-cutting applications. Built from solid carbide with a multilayer TiAlN coating, it delivers extended tool life in high-speed drilling operations. The bit measures 11.20 mm in diameter with an overall length of 102.00 mm (4.0157 inches) and a 140-degree split point that reduces walking and improves entry accuracy. Right-hand cutting with a regular spiral flute, this bit is suited for use in CNC machining centers, drill presses, and automated screw machine setups where rigidity and repeatable hole quality are priorities.

This drill bit is designed for stub-length drilling in ferrous and non-ferrous metals, hardened steels, and other difficult-to-machine materials. Its through-coolant capability supports high-feed, high-speed operations where heat management is critical. The 3xD flute-to-diameter ratio and tapered web configuration make it appropriate for production environments where cycle time and hole tolerance matter. Machinists and tooling specialists in job shops, aerospace, automotive, and precision manufacturing will find this bit suited to tight-tolerance through-hole and blind-hole work.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard materials
• Multilayer TiAlN coating (TiN at tip) extends tool life at elevated cutting temperatures
• 140-degree point angle reduces thrust force and minimizes drill walk on entry
• Through-coolant capable for heat management in high-speed production drilling
• Straight cylindrical shank at 12.00 mm diameter for standard collet and chuck compatibility
• Conforms to DIN 6537K specification for consistent geometry and dimensional tolerancing

Compatibility

Designed as an OEM-style replacement or direct application drill bit within the KENNAMETAL B051A-CPG series. Fits standard 12.00 mm straight-shank collets and drill chucks. Diameter tolerance is -0.018 to 0.000 mm, placing it in the 11.00 to 13.50 mm size range class per DIN designation.

Installation Notes

Installation and tool changes should be performed by qualified machinists with the machine powered down and locked out per applicable safety procedures. Confirm collet or chuck bore matches the 12.00 mm shank diameter before seating the tool. Through-coolant passages should be cleared and flow verified before beginning the drilling cycle. Follow the machine manufacturer and tooling guidelines for feed rate and spindle speed based on workpiece material.