Kennametal 4151635 Micro Drill Bit 1.40mm Solid Carbide

Product Description

The KENNAMETAL 4151635 is a solid carbide micro drill bit engineered for precision drilling in tight-tolerance applications. With a 1.40 mm (0.0551 inch) diameter and a 140-degree point angle, it delivers clean entry and accurate hole positioning in hard or abrasive materials. The TiAlN coating extends tool life by improving heat resistance and reducing friction at elevated cutting speeds. At 58.00 mm overall length with a 4.00 mm straight-cylindrical shank, this bit is sized for use in CNC machining centers, drill presses, and precision manual setups. It is part of the B041A-CPG series and conforms to DIN 6537K specification.

This micro drill bit is suited for precision machining operations in metalworking, aerospace, electronics, and industrial manufacturing environments. The right-hand cutting direction and standard point type make it a straightforward fit for conventional drill setups. A maximum drilling depth of 5.00 mm and a flute length of 7.00 mm (0.2756 inches) keep the tool optimized for shallow, high-accuracy bores in hard materials including hardened steels, cast iron, and similar workpieces where carbide tooling is required.

Key Features

• 1.40 mm (0.0551 inch) diameter with diameter tolerance of -0.014 to 0.000 mm for tight-tolerance work
• 140-degree point angle for reduced thrust force and accurate positioning
• TiAlN coating for improved heat resistance and extended tool life at high cutting speeds
• Solid carbide construction provides rigidity and wear resistance in hard materials
• Straight-cylindrical 4.00 mm shank for broad chuck compatibility
• Tapered web configuration with regular spiral flutes for efficient chip evacuation

Compatibility

Designed as an OEM-style replacement or standard tooling selection within the KENNAMETAL B041A-CPG series, conforming to DIN 6537K specification for use in compatible precision drilling setups.

Installation Notes

Installation and use should be performed by qualified machinists or tooling technicians familiar with carbide tooling handling. Power down and lock out the machine spindle before changing tooling. Micro drill bits are brittle at small diameters — avoid side loading, improper chuck seating, or excessive runout, which can cause premature breakage. Follow machine manufacturer feed and speed recommendations for carbide tooling in the material being drilled.