Walter-titex 5058393 Jobber Drill Bit 0.31mm Hss

Product Description

The WALTER-TITEX 5058393 is a jobber length twist drill bit designed for precision drilling in metalworking applications. Built from high speed steel with an oxide coating, this bit measures 0.31 mm (0.0122 inches) in diameter with an overall length of 19.00 mm (0.75 inches). The 118-degree standard point angle and web-thinned, tapered web configuration reduce entry force and improve chip evacuation on entry. With a regular spiral flute and right-hand cutting direction, it is suited for controlled, repeatable hole-making on the bench or in a drill press. Licensed machinists, tool-and-die technicians, and precision metalworkers are the primary installers of bits in this size range.

This bit is rated for use in cast iron and steel workpiece materials, covering material codes K and P. Typical applications include blind hole drilling and stack drilling operations where a consistent, tight-tolerance bore is required. The Series A1211 designation places this bit within a general-purpose, high-performance product line conforming to ANSI, ISO, BS, and DIN standards. The h8 diameter tolerance ensures dimensional consistency across production runs. Its compact flute length of 4.00 mm (approximately 5/32 inches) supports stability at sub-millimeter diameters where deflection risk is highest.

Key Features

• High speed steel construction with oxide coating for surface protection and reduced friction
• 118-degree standard point angle with web-thinned, tapered web for reduced thrust force
• Right-hand spiral flute for efficient chip removal in blind hole and stack drilling
• h8 diameter tolerance for consistent, repeatable bore sizing
• Conforms to ANSI, ISO, BS, and DIN standards
• Straight-cylindrical shank fits standard collets and drill chucks for this diameter range

Compatibility

Designed as an OEM-style general-purpose drill bit for use in manual drill presses, CNC machining centers, and hand-held drilling equipment that accept straight-cylindrical shanks in the sub-millimeter diameter range. Compatible with cast iron and steel workpiece materials per Series A1211 application guidelines.

Installation Notes

This bit should be installed and operated by qualified machinists or metalworking technicians familiar with micro-diameter tooling. Secure the straight-cylindrical shank fully in the chuck or collet before operating to prevent runout, which is especially critical at diameters below 0.5 mm. Power down and de-energize the spindle completely before changing tooling. Do not exceed the recommended maximum drilling depth of 3.40 mm (0.1340 inches) without withdrawing to clear chips.