Kennametal 4151158 Drill Bit 6.70mm Solid Carbide 140 Deg

Product Description

The KENNAMETAL 4151158 is a screw machine length (stub length) solid carbide drill bit designed for high-performance drilling in demanding production environments. Built to DIN 6537K standards, it features a 140-degree point angle for reduced thrust and improved centering, a multilayer TiAlN coating for heat resistance and extended tool life, and coolant-through capability for deep-hole applications. At 6.70 mm in diameter with an overall length of 3.1102 inches (79.00 mm), this bit is sized for precision work in tight-reach setups. It is installed and operated by machinists and CNC operators in metalworking and precision manufacturing applications.

This drill bit is suited for stub-length drilling operations in ferrous and non-ferrous metals where a shorter, more rigid tool is required to minimize deflection. The straight cylindrical shank at 8.00 mm diameter fits standard collets and drill chucks. The TiAlN coating on the tip combined with coolant-through channels makes it appropriate for high-speed machining centers and CNC drilling operations. The 3xD flute-to-diameter ratio and tapered web configuration support efficient chip evacuation in moderate-depth holes up to 24.00 mm (0.9449 inches).

Key Features

• Solid carbide construction for rigidity and wear resistance in hard materials
• 140-degree point angle reduces entry thrust and improves hole location accuracy
• Multilayer TiAlN coating extends tool life under elevated cutting temperatures
• Coolant-through design supports high-speed drilling and chip flushing
• DIN 6537K specification ensures dimensional consistency and interchangeability
• Tapered web and regular spiral flute geometry promote reliable chip evacuation

Compatibility

Designed as an OEM-spec stub-length drill bit in the KENNAMETAL B051A-CPG series, compatible with standard straight-shank collets and drill chucks accepting an 8.00 mm shank diameter.

Installation Notes

Installation is performed by machinists using standard collet chucks or keyless drill chucks rated for the 8.00 mm straight shank. Ensure the machine spindle is fully stopped and locked out before tool changes. Verify coolant-through passages are clear and that the coolant supply pressure is within the machine tool manufacturer's specified range before running. Do not exceed the recommended maximum drilling depth of 24.00 mm per the tool geometry.