Kennametal 4151632 Micro Drill Bit 1.30mm Solid Carbide

Product Description

The KENNAMETAL 4151632 is a solid carbide micro drill bit designed for precision drilling in tight-tolerance applications. With a 1.30 mm (0.0512 inch) diameter and a 140-degree point angle, this bit delivers clean entry geometry in hard and abrasive materials. The TiAlN coating improves wear resistance and heat tolerance, extending tool life in demanding cutting environments. At 58.00 mm overall length with a 4.00 mm straight-cylindrical shank, it mounts securely in standard toolholders. The tapered web configuration and regular spiral flute promote chip evacuation in short-depth bore applications. This bit is installed by machinists and toolroom technicians working in precision manufacturing, aerospace, electronics, and medical component production.

This micro drill bit is suited for applications requiring consistent hole quality in small-diameter, shallow-depth bores. It is intended for use in CNC machining centers, drill presses, and precision benchtop setups where hole diameter accuracy is critical. The maximum drilling depth is 5.00 mm, making it appropriate for through-holes and blind bores in thin workpiece stock. Right-hand cutting direction is standard for conventional spindle rotation. This bit conforms to DIN 6537K specification, aligning it with common European and international tooling standards used across contract machining and high-mix production environments.

Key Features

• 1.30 mm (0.0512 inch) diameter with diameter tolerance of -0.014 to 0.000 mm for tight hole accuracy
• 140-degree standard point angle for positive entry and reduced thrust force
• TiAlN coating for elevated wear resistance and thermal stability
• Solid carbide construction provides rigidity and edge retention in hard materials
• Tapered web with regular spiral flutes supports chip clearance in shallow bores
• DIN 6537K compliant for interchangeability with standard tooling systems

Compatibility

This bit belongs to the KENNAMETAL Series B041A-CPG and is compatible with standard straight-cylindrical toolholders accepting a 4.00 mm shank diameter. It is designed as an OEM-style replacement or production-run drill for precision machining applications using that series specification.

Installation Notes

Installation and tool changes should be performed with the machine spindle fully stopped and locked out per applicable safety procedures. Use a properly sized collet or drill chuck rated for the 4.00 mm shank to ensure concentric runout. Avoid exceeding the 5.00 mm maximum drilling depth to prevent deflection or tool breakage. Confirm spindle direction is set to right-hand rotation before engaging the cut.