Guhring 9026020063500 Carbide Drill Bit Letter E 1/4 Inch

Product Description

The GUHRING 9026020063500 is a jobber-length solid carbide drill bit sized to Letter E (0.2500 inches, or 1/4 inch) with a 130-degree drill point angle and a titanium nitride (TiN) coating. It belongs to GUHRING Series 2602 and features a parabolic flute geometry with web thinning for improved chip evacuation and reduced thrust. The straight-cylindrical shank measures 0.2500 inches in diameter. Overall length is 4.0000 inches (101.60 mm), and flute length is 2.7500 inches (69.85 mm). Right-hand cut orientation. Intended for installation by machinists, tool-and-die professionals, and metalworking technicians operating drill presses, CNC machining centers, or hand-held power tools in precision drilling applications.

This bit is primarily designed for drilling aluminum and non-ferrous materials, as indicated by the K, N, and P workpiece material codes. The parabolic flute profile promotes fast chip clearing in these softer, gummy materials, reducing heat buildup and tool breakage. The TiN coating adds surface hardness and lubricity. Maximum drilling depth is 2.4400 inches (61.88 mm). With a shank length of 32.00 mm and a flute-to-diameter ratio of 8xD, this bit suits through-hole and moderate-depth blind-hole work in production and job-shop environments.

Key Features

• Solid submicron carbide substrate for rigidity and wear resistance in non-ferrous and aluminum drilling
• Titanium nitride (TiN) coating increases surface hardness and reduces friction at the cutting edge
• Parabolic flute geometry with web thinning promotes efficient chip evacuation and lower thrust force
• 130-degree standard point angle suited to aluminum and general-purpose metalworking
• Straight-cylindrical shank (0.2500 inches) fits standard drill chucks and collet holders without adapters
• ANSI specification designation ensures dimensional conformance to recognized industry standards

Compatibility

Designed as an OEM-style jobber-length carbide drill bit for use in standard 1/4-inch drill chucks, collet systems, and CNC tool holders. Primary workpiece material codes K, N, and P indicate suitability for aluminum, non-ferrous metals, and plastics.

Installation Notes

Installation and use of carbide drill bits should be performed by qualified machinists or metalworking technicians familiar with cutting tool selection and machine setup. Ensure the spindle and workpiece are fully secured before initiating a cut, and confirm the chuck or collet is properly torqued to the tool holder manufacturer's specification. Carbide is brittle — avoid lateral loading, interrupted cuts without proper support, or impact-type drivers. Inspect the cutting edge for chipping before each use; a damaged TiN-coated carbide bit should be removed from service rather than reground without proper carbide grinding equipment.