Walter-titex 7684357 Extra Length Drill Bit 8mm Carbide

Product Description

The WALTER-TITEX 7684357 is a solid carbide extra length drill bit designed for demanding precision drilling applications in metalworking and industrial environments. It has an 8 mm diameter, a 140-degree drill point angle, and a TiSiAlCrN coating that extends tool life in abrasive and high-temperature cutting conditions. The overall length is 260 mm with a 220 mm flute length, making it well suited for deep-hole work where standard-length bits cannot reach. It uses a straight-cylindrical shank with an h7 diameter tolerance for secure, accurate chuck engagement. This tool is typically installed and operated by machinists, tool-and-die professionals, and CNC setup technicians.

This drill bit is built for production and job-shop environments where difficult materials and challenging entry conditions are common. Rated applications include blind holes, cross holes, inclined hole exits, and stack drilling. Primary workpiece materials are alloy steel and titanium alloy. Secondary materials include glass and graphite. The 25xD flute-by-diameter ratio and coolant-through design support chip evacuation and heat management during extended cuts. It conforms to ANSI and ISO standards, making it compatible with metric tooling setups in both domestic and international shop environments.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard and abrasive workpiece materials
• TiSiAlCrN coating provides thermal and oxidation resistance for extended tool life
• Coolant-through design promotes chip evacuation and controls heat in deep drilling operations
• 140-degree drill point reduces thrust force and improves centering on entry
• 25xD flute-to-diameter ratio supports deep-hole drilling up to 208 mm maximum drilling depth
• Straight-cylindrical shank with h7 tolerance ensures precise fit in collet chucks and drill holders
• Right-hand cutting direction; 2-flute geometry standard for this drill class

Compatibility

Designed for use in CNC machining centers, drill presses, and manual machines equipped with metric collet chucks or drill holders accepting an 8 mm straight-cylindrical shank. Rated for alloy steel, titanium alloy, glass, and graphite workpiece materials per Series DC160-25-A1 application guidelines.

Installation Notes

Installation and operation should be performed by qualified machinists familiar with carbide tooling and applicable shop safety procedures. Power down and de-energize the machine spindle completely before mounting or removing the bit. Ensure the chuck or collet is clean and undamaged before seating the shank to maintain the h7 tolerance fit. Coolant-through operation requires a compatible spindle coolant supply system; verify coolant pressure and flow rate against machine specifications before running.