Kennametal 4151147 Screw Machine Drill Bit 5.80mm Carbide

Product Description

The KENNAMETAL 4151147 is a screw machine length (stub) drill bit designed for high-productivity drilling in metalworking applications. Built from solid carbide and coated with a multilayer TiAlN finish at the tip, this bit delivers extended tool life in ferrous and non-ferrous materials. It measures 66.00 mm (2.5984 inches) in overall length with a 5.80 mm (0.2283 inch) cutting diameter, a 140-degree split point for self-centering entry, and a tapered web configuration that reduces thrust. The straight cylindrical shank seats directly into standard collet chucks or drill sleeves without adapters. Licensed machinists, CNC operators, and tool-room technicians are the primary installers.

This drill bit is suited for short-reach, high-precision hole-making on machining centers, CNC lathes, and screw machines where stub-length rigidity is required. The 3xD flute-to-diameter ratio and 28.00 mm (1.1024 inch) flute length support a maximum drilling depth of 20.00 mm (0.7874 inch) per pass. Coolant-through capability allows internal coolant delivery directly to the cutting zone, making it effective in production environments where cycle time and chip evacuation are priorities. The DIN 6537K specification confirms dimensional conformance for direct OEM and replacement use.

Key Features

• Solid carbide construction for rigidity and wear resistance in demanding metalworking applications
• Multilayer TiAlN coating at the tip extends cutting life in high-temperature drilling conditions
• 140-degree point angle with tapered web provides accurate self-centering and reduced entry thrust
• Coolant-through design delivers internal coolant to the cutting edge for chip evacuation and thermal control
• Straight cylindrical shank compatible with standard collet chucks and drill sleeves
• DIN 6537K compliant — dimensional tolerance of -0.012 to 0.000 mm on drill diameter

Compatibility

Designed as a DIN 6537K-compliant stub-length carbide drill bit in the KENNAMETAL B051A-CPG series, fitting standard toolholders and collet chucks sized for a 6.00 mm (0.2362 inch) straight shank within the 5.00 mm to 6.50 mm drill diameter range.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Always power down and lock out the machine spindle before changing tooling. Verify collet or chuck runout with a dial indicator before production drilling, as excessive runout accelerates carbide wear and affects hole tolerance. Do not exceed the rated maximum drilling depth of 20.00 mm per pass without retracting to clear chips.