Kennametal 4151127 Screw Machine Drill Bit 4.60mm Carbide

Product Description

The KENNAMETAL 4151127 is a screw machine length (stub) solid carbide drill bit designed for high-performance drilling in metalworking and machining applications. It features a 4.60 mm diameter with a 140-degree standard point angle and a multilayer TiAlN coating applied at the tip for extended tool life and heat resistance. The overall length is 66.00 mm (2.5984 inches), the flute length is 24.00 mm (0.9449 inches), and the straight cylindrical shank measures 6.00 mm in diameter. With a tapered web configuration and right-hand cutting direction, this bit is built for precision drilling in production environments. It belongs to the KENNAMETAL Series B051A-CPG and conforms to DIN 6537K specification.

This drill bit is suited for CNC machining centers, screw machines, and production drilling operations where stub-length rigidity reduces deflection in short-reach setups. The 3xD flute-to-diameter ratio and coolant-through capability make it appropriate for drilling steel, stainless steel, cast iron, and similar ferrous materials in both job shop and high-volume production environments. Licensed machinists and toolroom technicians working with precision components are the primary users of this tool.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard material drilling
• TiAlN multilayer coating at tip for improved heat resistance and extended tool life
• 140-degree point angle reduces thrust and improves chip formation on entry
• Coolant-through design supports internal flood or mist cooling during deep cuts
• Stub (screw machine) length improves stiffness and reduces runout in tight setups
• Conforms to DIN 6537K specification for dimensional consistency and interchangeability

Compatibility

Designed as an OEM-style replacement and standard production drill in the KENNAMETAL Series B051A-CPG, fitting drill bit size range 3.50 mm to 5.00 mm (0.1500 to 0.2000 decimal inch) across compatible toolholders accepting a 6.00 mm straight cylindrical shank.

Installation Notes

Installation is performed by machinists or toolroom technicians in a machine tool environment. Ensure the spindle is fully stopped and the machine is in a safe state before loading or removing the bit from the chuck or collet. Use a properly sized collet or drill chuck rated for the 6.00 mm shank diameter to prevent slippage. Verify coolant-through passages are clear before engaging the spindle if using internal coolant delivery.