Kennametal 4149641 Taper Length Drill Bit 6 Mm Carbide

Product Description

The KENNAMETAL 4149641 is a solid carbide taper length drill bit from the B053A-CPG series, designed for precision drilling in ferrous and non-ferrous materials where tight tolerances and extended tool life are required. The bit features a multilayer TiAlN coating (material grade KC7325) that resists heat buildup and edge wear during high-speed machining operations. At 6 mm in diameter (0.2362 inches), the 140-degree point geometry provides a self-centering entry and reduces thrust force, making it well suited for CNC machining centers and drill presses in production environments. Right-hand spiral flutes evacuate chips efficiently throughout the cut.

This drill bit is intended for use in metalworking applications including aerospace, automotive, and general machining where dimensional accuracy and surface finish are priorities. The straight cylindrical shank fits standard collet chucks and drill chucks. The coolant-through design allows internal delivery of cutting fluid directly to the cutting edge, extending tool life and improving chip evacuation in deep-hole drilling. The 8xD flute-to-diameter ratio supports drilling depths up to 48 mm without peck cycles in suitable materials. Machinists, tool-and-die makers, and CNC operators are the primary users of this bit.

Key Features

• Solid carbide construction with multilayer TiAlN coating (KC7325 grade) for extended wear resistance
• 140-degree standard point angle for reduced thrust and self-centering entry
• Coolant-through design for internal cutting fluid delivery at the cutting edge
• Right-hand spiral flute with regular helix for efficient chip evacuation
• Straight cylindrical shank compatible with standard collet and drill chucks
• Conforms to DIN 6537K specification for consistent dimensional standards

Compatibility

Designed as an OEM-style replacement or direct-fit drill bit for CNC machining centers, vertical mills, and drill presses equipped with standard straight-shank toolholders or collet chucks sized for 6 mm shank diameter.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the spindle fully stopped and the machine in a locked-out, de-energized state per applicable OSHA lockout/tagout procedures. Confirm collet or chuck runout is within acceptable tolerance before operation, as excessive runout accelerates carbide wear and risks tool breakage. When using the coolant-through feature, verify that coolant pressure is set within the machine and toolholder manufacturer specifications. Do not use this drill bit in handheld drill applications.