Precision Twist Drill 5998805 Jobber Drill Bit 9/32 in Hss

Product Description

The PRECISION TWIST DRILL 5998805 is a jobber length drill bit designed for general-purpose drilling in metal and hard materials. Built from high speed steel with a steam oxide coating, it measures 9/32 inch (0.2813 inch) in diameter with an overall length of 4.25 inches. The 118-degree standard point angle and web-thinned, tapered web design help center the bit and reduce thrust on entry. Two spiral flutes clear chips efficiently during through-hole and blind-hole drilling. This bit is sized and finished for repeated use in production and maintenance drilling applications handled by machinists, millwrights, HVAC technicians, and plumbers who drill into ferrous and non-ferrous stock.

The 5998805 is suited for drilling into steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. Its straight-cylindrical shank seats in standard three-jaw drill chucks on hand drills, drill presses, and milling machines. The 2-15/16 inch flute length accommodates drilling depths up to 2.9375 inches, making it appropriate for most jobber-depth holes in structural members, pipe hangers, electrical enclosures, and sheet metal fabrication work. Series R10 designation places it in a general-purpose performance tier for everyday trade use.

Key Features

• High speed steel construction with steam oxide coating for corrosion resistance and reduced friction
• 118-degree standard point angle with web-thinned tapered web for improved centering and reduced entry thrust
• Two spiral flutes, 2-15/16 inches long, for efficient chip evacuation up to full flute depth
• Right-hand cut, straight-cylindrical shank fits standard three-jaw chucks without adapters
• General-purpose grade rated for steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium
• Meets ANSI standards; Series R10 general-purpose designation

Compatibility

Designed as a general-purpose jobber length drill bit compatible with any standard three-jaw drill chuck accepting a 9/32 inch (0.2813 inch) straight-cylindrical shank, including hand drills, drill presses, and light milling setups.

Installation Notes

Secure the shank fully in a properly sized drill chuck before operation and verify chuck key is removed before starting the spindle. Use appropriate cutting fluid or coolant when drilling stainless steel, superalloys, or titanium to extend tool life and maintain dimensional accuracy. Allow the drill to come to a complete stop before removing it from the workpiece or adjusting the chuck. Follow applicable shop safety standards and wear eye protection during all drilling operations.