Walter-titex 6618769 Extra Length Drill Bit 3/16 in Carbide

Product Description

The WALTER-TITEX 6618769 is a solid carbide extra length drill bit designed for demanding precision drilling in hard and exotic materials. Built to Series DC150-12-A1 specifications, it features a 140-degree split point and a TiNAl coating that extends tool life in high-temperature cutting conditions. The 3/16 inch (4.76 mm) diameter bit has a flute length of 3.268 inches (83 mm) and an overall length of 4.764 inches (121 mm), making it suited for deep-reach applications where standard-length bits fall short. With a 12xD flute-to-diameter ratio and coolant-through capability, it handles heat and chip evacuation in tight, deep bores. Cutting direction is right-hand. This tool is installed and operated by machinists, toolroom technicians, and precision fabricators.

This drill bit is engineered for blind holes, cross holes, inclined hole exits, and stack drilling applications. Its primary workpiece material range includes cobalt alloys, iron, nickel, and titanium alloys. Secondary materials include glass and graphite. The straight-cylindrical shank diameter is 0.236 inches (6 mm) with a shank length of 1.417 inches (36 mm), compatible with standard drill chucks and collet holders configured for that shank size. Maximum drilling depth is 2.913 inches (74 mm). This bit is appropriate for CNC machining centers and manual precision drilling setups where consistent hole quality and positional accuracy are required.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard materials
• TiNAl coating reduces heat buildup and extends service life in high-alloy workpieces
• 140-degree drill point angle for accurate self-centering and reduced thrust force
• Coolant-through design supports chip evacuation and thermal control at depth
• 12xD flute-to-diameter ratio enables deep-reach drilling beyond standard bit capability
• Drill bit diameter tolerance m7 for consistent, repeatable hole sizing
• Meets ANSI, DIN 6535 HA, and ISO standards

Compatibility

Suited for use in cobalt alloys, iron, nickel, and titanium alloy workpieces as primary materials, and glass or graphite as secondary materials. Compatible with drill chucks and collet holders accepting a 0.236 inch (6 mm) straight-cylindrical shank. Applications include blind holes, cross holes, inclined hole exits, and stack drilling per Series DC150-12-A1 design intent.

Installation Notes

This drill bit is installed and operated by qualified machinists or toolroom technicians. Ensure the machine spindle is fully stopped and locked out before inserting or removing the bit from the chuck or collet. Verify the holder bore matches the 6 mm shank diameter and that runout is within acceptable limits before beginning a drilling cycle. When using coolant-through capability, confirm coolant pressure and flow are configured per the machine tool requirements before engaging the spindle.