Precision Twist Drill 5998493 37/64 in Hss Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5998493 is a screw machine length drill bit designed for high-performance drilling in tight-clearance applications. Built from high speed steel (HSS) with a bright, uncoated finish, this bit features a 37/64 inch (0.5781 inch) diameter, a 118-degree standard point angle, and a right-hand spiral flute. The shorter screw machine length body provides added rigidity compared to jobber-length bits, reducing deflection during drilling. Web thinning improves penetration at the cutting tip. This bit is suited for machinists, tool and die technicians, and maintenance trade professionals working on production and repair setups.

The 5998493 is rated for high-performance drilling with a primary workpiece material designation of titanium, though its HSS construction and standard geometry make it applicable across a broad range of metalworking tasks. The Series R40 designation identifies it within the PRECISION TWIST DRILL screw machine line. The straight-cylindrical shank fits standard drill chucks on benchtop drill presses, CNC turret setups, and handheld drill motors. This bit is sold individually and is appropriate for professional shop environments where consistent hole quality and tool rigidity are required.

Key Features

• 37/64 inch (0.5781 inch) diameter with 118-degree standard point angle for clean entry
• High speed steel construction provides hardness and wear resistance across metalworking applications
• Screw machine length body increases rigidity and reduces deflection versus jobber-length alternatives
• Web-thinned tapered web configuration reduces thrust and improves chip clearance at the tip
• Right-hand spiral flute with regular spiral type for effective chip evacuation
• Bright, uncoated finish — no coating to chip or delaminate, suitable for regrinding
• Meets ANSI standards; Series R40 general purpose grade

Compatibility

Designed for use in standard drill chucks accepting a straight-cylindrical shank; fits within the 0.5000 to 0.6000 inch drill bit size range. Primary workpiece material designation is titanium per supplier attribute data; general purpose grade rating indicates suitability across comparable metalworking materials as determined by the installing technician.

Installation Notes

Install and operate this drill bit in accordance with applicable machine shop safety practices and ANSI tooling guidelines. Secure the straight-cylindrical shank fully in the drill chuck and confirm runout before cutting. Power down and de-energize any drill press or CNC turret before changing tooling. Do not exceed the recommended feed and speed parameters for the workpiece material — consult the manufacturer cutting data for HSS tooling on titanium and hard metals.