Walter-titex 5337291 Cobalt Jobber Drill Bit Size 21

Product Description

The WALTER-TITEX 5337291 is a cobalt jobber-length drill bit in wire gauge size 21, with a decimal diameter of 0.1590 inches. It features a 130-degree split point (UFL), a parabolic flute design, and an AlCrN coating for extended tool life in demanding materials. The overall length is 2.9528 inches (75.00 mm) with a flute length of 1.6929 inches (43.00 mm). Manufactured to DIN 338 and meeting ANSI and ISO standards, this bit is suited for production drilling environments where accuracy and heat resistance are required. It is typically installed and operated by machining professionals, CNC operators, and toolroom technicians.

This drill bit is designed for use in blind hole drilling and stack drilling applications. Primary workpiece materials include cast iron, non-ferrous metals, stainless steel, and steel, corresponding to material codes K, M, N, and P. The parabolic flute geometry supports efficient chip evacuation in deeper drilling passes, making it well suited for production runs and tight-tolerance work. The straight-cylindrical shank fits standard drill chucks and collet holders accepting a 0.1590-inch shank diameter. Coolant-through capability is not available on this model; external or flood coolant is the standard approach for heat management.

Key Features

• Wire gauge size 21 (0.1590 inches) with h8 diameter tolerance for consistent fit
• AlCrN coating improves heat and wear resistance in ferrous and stainless applications
• 130-degree UFL split point reduces thrust and self-centers on entry
• Parabolic flute with web-thinned, tapered web construction for improved chip flow
• M35 cobalt material grade maintains hardness at elevated cutting temperatures
• Meets DIN 338, ANSI, and ISO standards; 5xD flute-to-diameter ratio

Compatibility

Designed as an OEM-style production drill for use in standard drill chucks and collet systems accepting a 0.1590-inch straight-cylindrical shank. Suitable for blind hole and stack drilling operations on cast iron, non-ferrous metal, stainless steel, and steel workpieces. Part of the WALTER-TITEX A1249XPL series.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or toolroom technicians familiar with speeds and feeds for cobalt-grade tooling in the applicable workpiece materials. Secure the straight-cylindrical shank firmly in a properly sized chuck or collet before operation. Because this bit does not have coolant-through capability, ensure adequate external or flood coolant is applied to manage heat buildup during extended cuts. Inspect the cutting edges and coating condition before each use; discard or resharpen when wear affects dimensional accuracy.