Precision Twist Drill 5998554 Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5998554 is a screw machine length drill bit designed for high-performance drilling in demanding industrial and trade applications. Built from high speed steel with a coated finish, this bit measures 0.116 inches (wire size #32) in diameter with an overall length of 1-7/8 inches and a flute length of 7/8 inch. The 135-degree split point geometry reduces walking on entry and cuts through material faster than a standard 118-degree point. Web thinning further reduces thrust and improves chip evacuation. Licensed tradespeople and machinist-level technicians specify this series for precision work where tight tolerances and clean hole geometry matter.

The R41C series is rated for heavy-duty use and is specifically listed for titanium as the primary workpiece material, making it suitable for aerospace, medical, and specialty fabrication applications where titanium fastener holes are required. The 2.5xD flute-to-diameter ratio and regular spiral geometry support chip clearing in short, stubby drilling operations. Screw machine length construction provides added rigidity in drill press, CNC, or turret lathe setups where stub-length bits are preferred over jobber-length alternatives.

Key Features

• 0.116 inch diameter, wire size #32, with 135-degree split point for reduced walking and fast penetration
• High speed steel construction with coated finish for extended tool life
• Web-thinned, tapered web configuration reduces thrust load during drilling
• Screw machine (stub) length at 1-7/8 inches overall provides rigidity in fixed tooling setups
• Right-hand cut, straight-cylindrical shank for standard chuck compatibility
• Meets ANSI and NAS 907 standards; rated for titanium primary workpiece material

Compatibility

Designed for use in drill presses, CNC machining centers, turret lathes, and hand-held drilling equipment accepting a straight-cylindrical shank. Rated for titanium as the primary workpiece material per ANSI and NAS 907 specifications, Series R41C.

Installation Notes

Installation and use should be performed by qualified machinists or trade professionals familiar with proper drill bit chuck seating and workpiece fixturing. Secure the workpiece firmly before drilling and verify the shank is fully seated in the chuck to prevent runout. When drilling titanium or other hard materials, use appropriate cutting fluid to reduce heat buildup and extend bit life. Never exceed the rated speed for the bit diameter and workpiece material combination.