Precision Twist Drill 5998557 No. 33 Hss Screw Machine Drill

Product Description

The PRECISION TWIST DRILL 5998557 is a screw machine length drill bit designed for high-performance drilling in demanding industrial applications. Built from high-speed steel (HSS) with a coated finish, this bit features a 135-degree split point with web thinning for fast penetration and reduced walking on entry. The straight-cylindrical shank measures 0.1130 inches in diameter, matching the No. 33 wire gauge size. At 1-7/8 inches overall length, the stub-style format provides added rigidity, making it well suited for close-tolerance drilling where deflection must be minimized. Licensed tradespeople and machinists working in fabrication, maintenance, or production environments are the primary users of this Series R41C bit.

This drill bit is rated for primary use in titanium workpieces and is built to ANSI and NAS 907 specifications, indicating heavy-duty, high-performance grade tooling. The regular spiral flute with a 2.5xD flute-to-diameter ratio and tapered web configuration supports efficient chip evacuation during short-hole drilling cycles. The screw machine length format is a common choice in CNC machining centers, turret lathes, and manual drill press setups where stub length is required for rigidity and tool clearance.

Key Features

• No. 33 wire size, 0.1130 inches decimal diameter for precision bore sizing
• 135-degree split point with web thinning reduces thrust force and entry walking
• High-speed steel construction with coated finish for improved wear resistance
• Screw machine (stub) length at 1-7/8 inches OAL for maximum rigidity
• Tapered web, regular spiral flute promotes clean chip removal
• Meets ANSI and NAS 907 standards for heavy-duty, high-performance drilling

Compatibility

Designed for drilling titanium as the primary workpiece material; also applicable in general-purpose HSS drilling operations where a No. 33 wire gauge stub-length bit conforming to ANSI and NAS 907 standards is specified.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or trade professionals familiar with proper tooling setup and speeds-and-feeds for HSS bits in hard materials. Secure the straight-cylindrical shank fully in the chuck or collet before operation to prevent slippage or runout. Always power down and de-energize the machine before changing tooling. Follow applicable ANSI safety standards and shop procedures when drilling titanium or other work-hardening materials.