Walter-titex 6618103 Screw Machine Drill Bit 6.40mm Carbide

Product Description

The WALTER-TITEX 6618103 is a solid carbide screw machine length drill bit designed for high-performance drilling in steel and cast iron. It features a 6.40 mm (0.2520 inch) diameter, a 140-degree split point, and a TiNAl coating that extends tool life in demanding production environments. With three regular spiral flutes and a 3 inches overall length, this bit delivers fast chip evacuation and stable cutting action at shorter working depths. It is sized for precision work within the DC150-03-A0 series and carries a Drill Bit Diameter Tolerance of m7, making it suitable for tight-tolerance holes. Machinists and toolroom technicians in metalworking shops are the primary users.

This drill bit is built for screw machine length applications where rigidity and accuracy matter more than reach. Its straight cylindrical shank (0.3150 inch diameter) fits standard drill chucks and collet holders without modification. The 0.7560-inch flute length supports a maximum drilling depth of 0.7560 inches, making it well suited for short, precise through-holes and blind holes in steel and cast iron workpieces. The 3xD flute-to-diameter ratio and universal tool performance classification make it a practical choice for CNC machining centers, drill presses, and screw machines running production runs on ferrous materials.

Key Features

• Solid carbide construction provides rigidity and heat resistance for ferrous metal drilling
• TiNAl coating improves wear resistance and reduces heat buildup at the cutting edge
• 140-degree special point angle reduces thrust force and minimizes workpiece deformation on entry
• Three-flute design improves chip evacuation and surface finish compared to standard two-flute bits
• m7 diameter tolerance supports tight-tolerance hole requirements without reaming in many applications
• Conforms to DIN and ISO standards for dimensional consistency and interchangeability

Compatibility

Designed as a DC150-03-A0 series screw machine length drill bit for use in steel and cast iron workpieces. Fits standard drill chucks and collet systems accepting a 0.3150-inch straight cylindrical shank. Suitable for drill bit size range of 0.2500 to 0.3000 decimal inch (5.00 to 6.50 mm).

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or toolroom technicians familiar with CNC or manual drilling equipment. Before mounting, ensure the machine spindle and chuck are clean and free of debris to maintain runout tolerances. Always power down and lock out the machine before changing tooling. Do not exceed the manufacturer-rated speeds and feeds for solid carbide tooling in ferrous materials, and verify shank seating depth in the holder before starting a cut.