Walter-titex 6618749 Extra Length Drill Bit 0.125 in Carbide

Product Description

The WALTER-TITEX 6618749 is a solid carbide extra length drill bit engineered for demanding precision drilling applications. With a 0.125 inch cutting diameter, a 140-degree drill point angle, and a TiNAl (titanium aluminum nitride) coating, this bit is built for high-performance drilling in difficult materials including cobalt alloys, nickel alloys, titanium alloys, cast iron, and aluminum. The flute length measures 2.126 inches and the overall length is 3.622 inches, giving it the reach needed for deeper bore configurations. Coolant-through capability supports chip evacuation and thermal control during extended cuts. A right-hand, two-flute geometry balances cutting speed with hole quality across a range of workpiece types.

This drill bit is designed for industrial and precision machining environments where hole accuracy and tool life in hard materials are critical. Typical applications include blind hole drilling, cross hole drilling, inclined hole exit drilling, and stack drilling. The bit belongs to the DC150-12-A1 series, which is rated for a flute-to-diameter ratio of 12xD, supporting a maximum drilling depth of 1.89 inches. Secondary workpiece materials include glass and graphite. The straight-cylindrical shank with a 0.236 inch shank diameter is compatible with standard collet and drill chuck toolholding systems used in CNC machining centers and precision drill presses.

Key Features

• Solid carbide construction for superior rigidity and wear resistance in hard and abrasive materials
• TiNAl coating extends tool life and reduces heat buildup at the cutting edge
• 140-degree drill point angle minimizes walking and reduces thrust force at entry
• Coolant-through design aids chip evacuation and controls heat in deep or blind holes
• 12xD flute-to-diameter ratio supports drilling depths up to 1.89 inches
• Meets ANSI, DIN 6535 HA, and ISO standards for dimensional consistency

Compatibility

Designed for use in CNC machining centers and precision drill presses equipped with standard collet or chuck toolholding compatible with a 0.236 inch straight-cylindrical shank. Rated for primary workpiece materials including cobalt, iron, nickel, and titanium alloys, and secondary materials including glass and graphite.

Installation Notes

Installation and use should be performed by qualified machinists or tooling technicians familiar with carbide tooling handling. Ensure the machine spindle and toolholding system are powered down and secured before inserting or removing the bit. Solid carbide bits are brittle compared to high-speed steel - avoid side loading or using in hand-held drill applications. Verify coolant lines are clear and delivering flow before initiating cuts in deep or blind hole configurations.