Walter-titex 5058271 Jobber Drill Bit Letter H Hss Oxide

Product Description

The WALTER-TITEX 5058271 is a jobber length twist drill bit sized at letter H (0.2660 inches) and manufactured from high speed steel with an oxide coating for improved wear resistance and heat dissipation. The bit features a 118-degree standard point angle with a web-thinned, tapered web configuration that reduces entry force and improves chip evacuation. Two spiral flutes in a regular helix pattern move chips efficiently out of the cut zone. With an overall length of 4-9/32 inches and a flute length of 2-23/32 inches, this bit suits general-purpose drilling in production and maintenance environments. It is installed by machinists, tool-and-die workers, and maintenance technicians.

This drill bit is designed for drilling blind holes and stack drilling operations in cast iron and steel workpieces. The straight-cylindrical shank (0.2660 inches diameter) seats directly into standard drill chucks and collet systems without adapters. The Series A1211 designation places this bit within a high-performance jobber series conforming to ANSI, ISO, BS, and DIN standards, making it suitable for CNC drilling centers, drill presses, and handheld power tools in both production shops and field maintenance applications.

Key Features

• Letter H size: 0.2660 inch diameter for precise fractional and close-tolerance hole applications
• 118-degree standard point angle with web-thinned tapered web for reduced thrust and cleaner entry
• Oxide coating on high speed steel substrate improves lubricity and extends tool life in ferrous materials
• Regular spiral flute with 8xD flute-to-diameter ratio promotes efficient chip evacuation in deeper holes
• Right-hand cutting direction; compatible with standard drill chucks and collet holders
• Coolant-through: No - suited for dry or flood-coolant applications via external delivery
• Conforms to ANSI, ISO, BS, and DIN specification designations

Compatibility

Designed as an OEM-style general purpose jobber length drill bit for use in standard drill chucks and collet systems accepting a 0.2660-inch straight-cylindrical shank. Primary workpiece materials are cast iron and steel (material codes K and P).

Installation Notes

Machinists and maintenance technicians should ensure the drill chuck or collet is clean and fully tightened before use. Confirm the workpiece is securely fixtured or clamped before beginning any drilling operation. Always power down and lock out the machine before changing tooling. Do not exceed the maximum drilling depth of 2.2440 inches without retracting to clear chips from the flutes.