Walter-titex 6618108 Screw Machine Drill Bit 6.8mm

Product Description

The WALTER-TITEX 6618108 is a solid carbide screw machine length drill bit engineered for high-accuracy drilling in demanding industrial and trade applications. Built to Series DC150-03-A0, it features a 6.8 mm (0.2680 inch) diameter with a 140-degree drill point angle designed for clean entry and reduced thrust. The three-flute spiral configuration improves chip evacuation and surface finish compared to standard two-flute designs. At 3 inches overall length with a straight-cylindrical shank measuring 0.3150 inches in diameter, this bit fits standard drill chucks and CNC tool holders without modification. Diameter tolerance is held to m7 for precision fit applications. Weight is 0.1 pounds.

This drill bit is intended for use on cast iron and steel workpieces in machine shop, manufacturing, and maintenance environments. The screw machine length profile — shorter than jobber length — provides added rigidity, making it well-suited for drill press, CNC machining center, and turret lathe applications where runout control and hole location accuracy are critical. The 3xD flute-by-diameter ratio and universal tool performance rating support a broad range of production drilling tasks. Licensed machinists, tool and die makers, and maintenance mechanics are the typical installers.

Key Features

• Solid carbide construction for extended tool life in ferrous materials
• 140-degree special point angle reduces thrust and improves entry accuracy
• Three-flute spiral design enhances chip evacuation and hole finish
• Screw machine length body adds rigidity versus jobber-length bits
• Straight-cylindrical shank compatible with standard drill chucks and collets
• Meets DIN and ISO standards with m7 diameter tolerance

Compatibility

Designed as an OEM-style replacement or direct-application drill bit for machine shop and production drilling operations targeting cast iron and steel workpieces within the 6.50 mm to 8.00 mm diameter range (0.2500 to 0.3000 decimal inch).

Installation Notes

Installation and use should be performed by qualified machinists or maintenance mechanics familiar with rotating cutting tools. Ensure the drill chuck or collet is properly tightened and the workpiece is securely clamped before initiating a cut. Solid carbide tooling is brittle — avoid side loading, interrupted cuts without appropriate feed adjustment, and dropping the bit on hard surfaces. Follow machine manufacturer guidelines for spindle speed and feed rate based on workpiece material and bit diameter.