Precision Twist Drill 6000274 Extra Length Drill Bit

Product Description

The PRECISION TWIST DRILL 6000274 is a 1/4 inch diameter extra length high speed steel drill bit designed for through-hole and deep-reach drilling applications across metalworking and fabrication trades. Running at a standard 118-degree point angle with a web-thinned tip, it penetrates a wide range of materials with reduced thrust. The 8 inch overall length and 6 inch spiral flute provide access to deep cavities and extended workpieces that standard-length bits cannot reach. The bright uncoated finish suits general-purpose use without specialized coolant requirements.

This bit is suited for machinists, pipefitters, HVAC technicians, and fabricators who need extended reach when drilling through structural members, thick plate, or layered assemblies. Its primary workpiece materials include aluminum, magnesium, copper, nickel, synthetic materials, and titanium. Secondary workpiece materials include stainless steel, hardened steel, nickel alloy, malleable iron, high strength bronze, magnesium alloy, and reinforced plastics. The straight cylindrical shank seats in standard drill chucks and collets without adapters.

Key Features

• 1/4 inch diameter with matching 1/4 inch straight cylindrical shank for direct chuck mounting
• 8 inch overall length with 6 inch flute length for deep-reach drilling at 12xD flute-to-diameter ratio
• 118-degree standard point angle with web thinning to reduce entry thrust
• High speed steel construction with bright uncoated finish for general-purpose metal drilling
• Right-hand cutting, regular spiral, two-flute design for efficient chip evacuation
• Meets ANSI standards; rated for use without coolant-through capability

Compatibility

Designed as a general-purpose replacement or stock bit for Series 860 extra length drill bit applications. Compatible with standard 3-jaw drill chucks and collet systems accepting a 1/4 inch straight cylindrical shank. Suitable for use in drill presses, hand drills, and milling machine setups.

Installation Notes

This bit is installed by machinists and metalworking tradespeople using standard drill press or hand-drill equipment. Secure the shank fully in the chuck and verify concentricity before drilling to prevent bit deflection on deep-reach passes. Reduce feed pressure when breaking through the back side of a workpiece to avoid grabbing. Follow applicable shop safety codes and wear eye protection during all drilling operations.