Kennametal 4151189 Screw Machine Drill Bit 9.10mm Carbide

Product Description

The KENNAMETAL 4151189 is a stub-length (screw machine length) drill bit designed for high-performance drilling in demanding production environments. Built from solid carbide and finished with a multilayer TiAlN coating, this bit delivers extended tool life in tough materials including hardened steels, cast iron, and high-temperature alloys. It features a 140-degree point angle for aggressive, self-centering entry and reduced thrust force. The 9.10 mm cutting diameter, 89.00 mm overall length, and right-hand spiral flute geometry make it well-suited to CNC machining centers and automated drill presses where rigidity and repeatability are critical. Coolant-through capability supports high-speed, deep-hole applications.

This drill bit is suited for metalworking and precision machining operations in production shops, tool rooms, and manufacturing facilities. Its stub-length design provides added rigidity compared to jobber-length bits, reducing deflection in short-reach applications. The straight cylindrical shank accommodates standard drill chucks and collet holders. It is typically installed and operated by machinists and CNC programmers working to tight hole-tolerance requirements. The B051A-CPG series follows DIN 6537K specification, aligning with common European and internationally accepted tooling standards.

Key Features

• Solid carbide construction for maximum rigidity and wear resistance
• Multilayer TiAlN coating extends tool life in ferrous and high-temp alloys
• 140-degree point angle for self-centering entry and reduced thrust
• Coolant-through design supports high-speed and deep-hole drilling
• Stub (screw machine) length provides superior rigidity over jobber-length alternatives
• Conforms to DIN 6537K specification for consistent dimensional accuracy

Compatibility

Designed as an OEM-specification solid carbide drill bit in the KENNAMETAL B051A-CPG series, conforming to DIN 6537K, for use in standard straight-shank drill chucks and collet holders on CNC machining centers and conventional drill presses.

Installation Notes

Installation and operation should be performed by qualified machinists or CNC technicians. Ensure the machine spindle is fully stopped and locked out before inserting or removing the bit from the chuck or collet. Verify that shank diameter and holder bore are clean and free of chips before seating the tool. Follow machine manufacturer guidelines for speed, feed, and coolant flow when running carbide tooling.