Guhring 9005490057900 Jobber Drill 0.2280 in Hss

Product Description

The GUHRING 9005490057900 is a high-speed steel jobber-length drill bit sized to No. 1 wire gauge (0.2280 inches decimal equivalent). It features a 130-degree split-point tip with web thinning to reduce thrust and improve centering on entry. The parabolic flute geometry accelerates chip evacuation, making this bit well-suited for deeper holes where chip packing is a concern. The bright, uncoated finish and tapered web configuration are consistent with DIN 338 specifications for heavy-duty drilling applications. Machinists and maintenance technicians are the primary users of this series.

This drill bit is designed for use in steel, cast iron, aluminum, and other non-ferrous materials. The Series 549 parabolic flute design supports drilling depths up to approximately 1.902 inches in a single pass before chip clearing is required. With an overall length of 3.6563 inches and a flute length of 2.25 inches, it fits standard drill chucks and CNC tool holders that accept a 0.2280-inch straight cylindrical shank. It is appropriate for both manual and machine drilling on production floors, job sites, and maintenance shops.

Key Features

• No. 1 wire size, 0.2280 inches diameter with a straight cylindrical shank of matching diameter
• 130-degree standard point angle with web thinning for reduced entry thrust and improved self-centering
• Parabolic flute geometry for efficient chip evacuation at a 5xD flute-to-diameter ratio
• Bright uncoated high-speed steel construction rated for steel, cast iron, and non-ferrous materials
• Tapered web configuration for consistent rigidity along the flute length
• Conforms to DIN 338 specification for jobber-length drill geometry

Compatibility

Designed as a DIN 338 jobber-length replacement for No. 1 wire gauge drill applications in standard drill chucks and CNC tool holders that accept a 0.2280-inch straight cylindrical shank.

Installation Notes

Installation and use of this bit should be performed by a qualified machinist or maintenance technician familiar with drill press or CNC spindle setup. Secure the shank fully in the chuck or collet before operation and verify runout is within acceptable limits for the material being drilled. Reduce feed rate when drilling cast iron or hardened steel to extend tool life. Do not exceed the recommended maximum drilling depth of 1.902 inches without retracting to clear chips.