Kennametal 4149627 Taper Length Drill Bit No. 7 Solid Carbide

Product Description

The KENNAMETAL 4149627 is a taper length drill bit built for precision drilling in tough materials. It is manufactured from solid carbide in the KC7325 material grade and carries a multilayer TiAlN coating that resists heat and wear during high-speed cutting operations. The 140-degree standard point geometry reduces thrust and centers the bit cleanly on entry. With an overall length of 94 mm (3.75 inches) and a flute length of 56 mm (2.2047 inches), this bit handles applications requiring reach beyond standard jobber-length tooling. It features a straight cylindrical shank, right-hand spiral flutes, and coolant-through capability. Licensed machinists, tool and die makers, and precision drilling technicians are the primary users.

This drill bit is suited for production and maintenance machining environments where consistent hole quality in hardened steels, stainless alloys, cast iron, and similar materials is required. The 8xD flute-length-to-diameter ratio and maximum drilling depth of 48 mm (1.8898 inches) make it appropriate for moderate-depth holes in CNC machining centers and drill presses. It conforms to DIN 6537K specification, which defines geometry and tolerance for straight-shank drills used in precision applications. The 0.2010-inch diameter corresponds to No. 7 wire gauge sizing, a common specification in aerospace, automotive, and general metalworking programs.

Key Features

• Solid carbide KC7325 grade construction for hardness and wear resistance in demanding alloys
• Multilayer TiAlN coating extends tool life at elevated cutting temperatures
• 140-degree standard point angle reduces walking and minimizes entry burrs
• Coolant-through design delivers cutting fluid directly to the tip for deep-hole chip evacuation
• Straight cylindrical shank compatible with standard collets and drill chucks
• Conforms to DIN 6537K geometry and tolerance standard

Compatibility

Designed as an OEM-style taper length drill for use in CNC machining centers, drill presses, and manual machines equipped with collet systems or drill chucks that accept a 6 mm (0.2362-inch) straight cylindrical shank. Belongs to the KENNAMETAL B053A-CPG series.

Installation Notes

This tool should be installed by qualified machinists following standard tooling setup procedures. Ensure the machine spindle and collet or chuck are free of chips and properly torqued to the toolholder manufacturer specification before running. Verify coolant-through lines are clear and pressurized before initiating a drilling cycle, as blocked coolant flow can cause premature tool failure. Do not exceed the maximum drilling depth of 48 mm in a single pass without a peck-drilling cycle to clear chips.