Guhring 9005300060400 Jobber Drill Bit Letter B Firex

Product Description

The GUHRING 9005300060400 is a jobber-length drill bit sized to Letter B (0.2378 inches) and built for high-performance drilling in steel and cast iron. Manufactured from powdered metal and finished with a FIREX coating, this bit is engineered for extended tool life in demanding production and maintenance environments. The 130-degree drill point angle and parabolic flute design promote efficient chip evacuation and reduce heat buildup during deep-hole drilling. A web-thinned cone relief point reduces entry force and improves centering accuracy. This bit is installed by machinists, maintenance technicians, and tool-and-die professionals working with drill presses, CNC machining centers, or portable drilling equipment.

This drill bit is suited for drilling cast iron and steel in both shop and field applications. The straight-cylindrical shank fits standard drill chucks without adapters. With a flute-to-diameter ratio of 5xD and a fast spiral configuration, it performs well in through-hole and blind-hole operations at jobber depth. The Series 530 designation places it within a consistent product family built to DIN 338 standards, making it a reliable choice for shops that standardize on metric-specification tooling.

Key Features

• Letter B size at 0.2378 inches - fits within the 0.2000 to 0.2500 inch size range
• FIREX coating for improved wear resistance and heat dissipation on ferrous materials
• 130-degree drill point angle optimized for cast iron and steel
• Parabolic flute with fast spiral promotes chip clearance in deeper holes
• Web-thinned cone relief point reduces thrust and improves hole entry accuracy
• Manufactured to DIN 338 specification with h8 shank diameter tolerance

Compatibility

Designed as a DIN 338-compliant jobber-length drill bit for use in standard drill chucks and machining equipment that accept a straight-cylindrical shank. Primary workpiece materials are cast iron and steel. Compatible with drill presses, CNC machining centers, and handheld drilling equipment accepting a 6.04 mm shank.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with rotating cutting tools. Ensure the shank is fully seated and securely clamped in the chuck before operation. Verify machine RPM and feed rate are appropriate for the workpiece material and bit diameter before drilling. Do not use this bit on materials outside its rated workpiece material categories without consulting manufacturer guidance.