Precision Twist Drill 5997262 1/4 Inch Hss Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5997262 is a screw machine length drill bit designed for high-performance drilling in steel and cast iron. It measures 1/4 inch (0.2500 inches) in diameter with a 2.5 inch overall length and features a 135-degree split point for fast, self-centering starts without a center punch. The parabolic flute geometry promotes efficient chip evacuation, reducing heat buildup and extending tool life during deep or repetitive drilling operations. Made from high-speed steel (HSS) with a bright/uncoated finish, this bit is suited for machinists, fabricators, and maintenance technicians working with ferrous materials.

The 5997262 belongs to the QC41P series and is built for screw machine and short-hole drilling applications where rigidity and accuracy are critical. The stub length reduces deflection compared to jobber-length bits, making it well suited for drill presses, CNC turret lathes, screw machines, and hand-held operations on steel, cast iron, and similar ferrous workpieces. The straight cylindrical shank fits standard drill chucks without modification. This bit is sold individually but requires a minimum order of 12 units.

Key Features

• 135-degree split point for self-centering entry and reduced thrust force
• Parabolic flute profile improves chip flow and reduces clogging in deep holes
• Screw machine (stub) length at 2.5 inches overall reduces deflection and increases rigidity
• Web-thinned, tapered web configuration for lower cutting resistance
• High-speed steel construction handles heat generated in ferrous-material drilling
• Right-hand cutting with straight cylindrical shank for universal chuck compatibility
• Meets ANSI standards for dimensional consistency

Compatibility

Designed for drilling steel and cast iron as an OEM-style screw machine length bit in the QC41P series. Fits any standard drill chuck accepting a 0.2500-inch straight shank.

Installation Notes

This bit is installed and replaced by machinists, maintenance technicians, or tool-room personnel using a standard drill chuck or collet system. Ensure the machine spindle is fully stopped and locked out before changing bits. Secure the shank fully in the chuck to the recommended grip depth to prevent slippage and runout. Do not exceed the rated speed range for 1/4 inch HSS tooling in the material being drilled, and use appropriate cutting fluid when drilling steel to prolong edge life.