Precision Twist Drill 5997592 Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5997592 is a screw machine length drill bit engineered for high-performance drilling in cast iron and steel. Manufactured from high speed steel (HSS) with a bright, uncoated finish, it features a parabolic flute geometry and a 135-degree split point for fast, accurate starts with reduced walking. The straight-cylindrical shank fits standard drill chucks without modification. At 4.25 inches overall length with a 2.75-inch flute, this stub-length bit delivers rigid, controlled drilling in tight-clearance applications on manual and CNC machine tools alike.

This bit is suited for production and maintenance machining environments where shorter length-to-diameter ratios improve rigidity and reduce deflection. The QC41P series is designed for primary workpiece materials including cast iron and steel. The parabolic flute profile promotes efficient chip evacuation at higher feed rates, making it a practical choice for machinists and maintenance technicians working on metal fabrication, repair, or production drilling operations.

Key Features

• 135-degree split point reduces thrust and eliminates the need for a center punch on most metals
• Parabolic flute design improves chip evacuation at aggressive feed rates
• High speed steel construction withstands heat generated in steel and cast iron drilling
• Screw machine length (stub) reduces deflection compared to jobber-length bits
• Web-thinned, tapered web configuration for improved cutting efficiency
• ANSI-compliant geometry and dimensions

Compatibility

Designed for use in standard drill chucks and machine tool spindles accepting a straight-cylindrical shank. Primary workpiece materials are cast iron and steel, consistent with QC41P series application guidelines.

Installation Notes

This bit is installed by machinists and maintenance technicians in drill presses, lathes, and CNC machining centers. Secure the straight shank fully in the chuck or collet before operation, and ensure the machine is at a full stop before changing bits. Apply appropriate cutting fluid for steel applications to extend tool life. Follow ANSI B94.11 and your machine manufacturer guidelines for speed and feed selection.