Precision Twist Drill 5999423 Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5999423 is a screw machine length drill bit designed for high-performance drilling in demanding trade and industrial applications. Built from high speed steel with a coated finish, this bit features a 135-degree split point with web thinning that reduces walk and cutting force on entry. The straight-cylindrical shank measures 15/32 inch (0.4688 inches) in diameter with a regular spiral flute configuration, making it suitable for use in standard drill chucks and machining equipment. It is a right-hand cut bit and does not require coolant-through capability. At 3-5/8 inches overall length with a 2-1/8 inch flute length, it fits the compact profile needed for stub-length drilling setups.

This bit is intended for use in screw machine operations, production drilling, and precision shop environments where tight tolerances and controlled entry are required. Its heavy duty grade and high performance classification make it appropriate for machinists, pipefitters, and fabricators working with titanium and other challenging workpiece materials. The R40C series designation and compliance with ANSI and NAS 907 specifications position it for applications where material standards are specified on engineering drawings or work orders.

Key Features

• 135-degree split point with web thinning reduces walking and lowers thrust required at entry
• High speed steel construction with coated finish for extended tool life in abrasive materials
• Screw machine (stub) length provides increased rigidity compared to jobber length bits
• Right-hand spiral flute evacuates chips efficiently during through-hole drilling
• Straight-cylindrical shank fits standard 3-jaw chucks and collets without adapters
• Meets ANSI and NAS 907 specifications for use in controlled manufacturing environments

Compatibility

Designed as an OEM-style replacement or direct-use drill bit for screw machine and production drilling setups requiring a 15/32 inch diameter right-hand cut stub-length bit. Primary workpiece material is titanium, though the R40C high speed steel series is also applied in general heavy duty drilling contexts per ANSI and NAS 907 standards.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or trade professionals familiar with proper drill press, lathe, or CNC setup procedures. Ensure the machine is fully powered down and the spindle is locked before changing bits. Confirm chuck or collet is tightened to the manufacturer specification for the machine in use before initiating a cut. Always wear appropriate PPE including eye protection when operating drilling equipment, and verify workpiece is securely fixtured before cutting.