Guhring 9005490066300 Drill Bit Letter G 0.261 in Hss

Product Description

The GUHRING 9005490066300 is a jobber-length drill bit in letter size G (0.2610 inches decimal equivalent), designed for high-performance metal drilling applications. Manufactured from high speed steel (HSS) with a bright, uncoated finish, this bit features a parabolic flute geometry and a web-thinned, tapered web configuration that reduces thrust and improves chip evacuation. The 130-degree split point is suited for accurate starting and clean entry without a center punch in many applications. With an overall length of 3-31/32 inches and a flute length of 2-15/32 inches, this drill is intended for use in drill presses, CNC machines, and handheld drilling equipment by machinists, maintenance technicians, and trade professionals.

This drill bit is rated as a high-performance grade and conforms to DIN 338 standards. It is primarily designed for aluminum and non-ferrous materials, as indicated by workpiece material codes K, N, and P. The parabolic flute profile supports efficient chip clearing in through-hole and deep drilling scenarios. With a 5xD flute-to-diameter ratio and a maximum drilling depth of 2.0890 inches (53.06 mm), it fits standard drilling operations in light manufacturing, HVAC fabrication, plumbing rough-in, and general mechanical service environments. The straight-cylindrical shank measures 0.2610 inches in diameter and is compatible with standard drill chucks and collet holders.

Key Features

• Letter G size with 0.2610 inch decimal equivalent for precise bore sizing
• Parabolic flute geometry promotes fast chip evacuation and reduced heat buildup
• Web-thinned, tapered web lowers cutting resistance and entry thrust
• 130-degree point angle provides accurate positioning and clean hole entry
• Conforms to DIN 338 standard for jobber-length HSS drill bits
• Bright uncoated finish suitable for aluminum, plastics, and soft metals

Compatibility

Designed as a DIN 338-compliant jobber-length drill bit optimized for aluminum and non-ferrous workpiece materials (material codes K, N, P), suitable for use in standard drill chucks and collet systems accepting a 0.2610 inch straight-cylindrical shank.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or trade professionals familiar with drilling equipment safety. Secure the shank fully in the chuck or collet before operation and verify chuck runout is within tolerance to protect the cutting edge. Do not exceed the recommended drilling depth of 2.0890 inches without retracting to clear chips. Use appropriate cutting fluid for the workpiece material when drilling in production environments to extend tool life.