Kennametal 4149664 Taper Length Drill Bit 7.7mm Carbide

Product Description

The KENNAMETAL 4149664 is a solid carbide taper length drill bit in the B053A-CPG series, designed for high-performance drilling in demanding production environments. The bit features a 140-degree point angle for accurate entry and reduced thrust, and is finished with a multilayer TiAlN coating that extends tool life in abrasive and high-temperature cutting conditions. At 7.7 mm in diameter with a straight cylindrical shank of 8.0 mm, it is sized for precision work requiring tight tolerances. Cutting direction is right hand with a spiral flute configuration. This tool is intended for use by machinists and CNC operators working in metal fabrication, aerospace, automotive, and general manufacturing applications.

The 4149664 is suited for drilling in ferrous and non-ferrous metals where coolant-through capability is required to manage chip evacuation and heat at depth. With an 8xD flute-length-to-diameter ratio and a maximum drilling depth of 61.0 mm, it handles deep-hole applications where standard-length drills fall short. The DIN 6537K specification ensures dimensional consistency expected in automated and manual CNC setups. The KC7325 carbide grade provides the hardness and wear resistance required for extended run times in production drilling.

Key Features

• Solid carbide construction in KC7325 grade for high wear resistance and thermal stability
• Multilayer TiAlN coating extends tool life in high-temperature cutting conditions
• 140-degree standard point angle reduces walking and minimizes entry burrs
• Coolant-through design supports chip evacuation in deep-hole drilling up to 61.0 mm
• 8xD flute-length-to-diameter ratio enables drilling beyond standard reach
• Right-hand spiral flute with tapered web configuration for efficient chip flow

Compatibility

Designed as a direct-use and replacement tool conforming to DIN 6537K for applications requiring a 7.7 mm solid carbide taper length drill bit with a straight cylindrical shank. Verify spindle collet or chuck capacity accommodates the 8.0 mm shank diameter before installation.

Installation Notes

Installation and use of this tool should be performed by qualified machinists or CNC technicians familiar with solid carbide tooling. Ensure the machine spindle is fully stopped and locked out before inserting or removing the bit. Confirm the collet or chuck is rated for the 8.0 mm shank diameter and that coolant-through channels are open and clear before engaging the workpiece. Do not exceed the maximum drilling depth of 61.0 mm, and follow machine manufacturer feed and speed recommendations for the specific workpiece material.