Guhring 9026020086100 Carbide Drill Bit Letter R Tin

Product Description

The GUHRING 9026020086100 is a solid carbide jobber-length drill bit sized to Letter R (0.3390 inches) with a titanium nitride (TiN) coating and a 130-degree split point. Built on GUHRING Series 2602 geometry, it features a parabolic flute profile designed to evacuate chips efficiently and reduce heat buildup during high-speed drilling operations. The submicron carbide grade provides edge stability across a wide range of workpiece materials. Overall length is 4.750 inches (120.65 mm) with a flute length of 3.438 inches. This bit is intended for installation and production machinists working in precision drilling applications where dimensional accuracy and tool life are critical.

This drill bit is suited for drilling aluminum, non-ferrous metals, and a range of ferrous materials where a parabolic flute is specified for improved chip flow. The 8xD flute-to-diameter ratio supports deeper hole entry relative to diameter. The straight-cylindrical shank fits standard drill chucks and collet holders without modification. It is appropriate for CNC machining centers, drill presses, and manual machines where carbide tooling is indicated. The 130-degree point angle and web-thinned tip reduce entry thrust and improve centering on entry, which is particularly useful when drilling aluminum and similar non-ferrous alloys.

Key Features

• Solid submicron carbide construction for extended edge life compared to HSS tooling
• Titanium nitride (TiN) coating reduces friction and improves surface finish in the bore
• Parabolic flute geometry promotes efficient chip evacuation in deep-hole drilling
• 130-degree point angle with web thinning lowers entry thrust and improves self-centering
• Straight-cylindrical shank compatible with standard drill chucks and ER collet systems
• Diameter tolerance of +0.000 to -0.022 mm for consistent fit in close-tolerance applications

Compatibility

Designed as a direct-use jobber-length drill for aluminum (K), non-ferrous materials (N), and steel workpiece materials (P) as designated by primary workpiece material codes; compatible with any machine spindle accepting a straight-cylindrical shank of 0.3390 inches diameter per ANSI specification.

Installation Notes

Installation and use should be performed by qualified machinists following standard tooling setup procedures. Ensure the machine spindle is fully stopped and locked out before inserting or removing the bit from the chuck or collet holder. Verify chuck or collet bore size matches the 0.3390-inch shank diameter before tightening. Do not exceed the maximum drilling depth of 3.000 inches (76.19 mm) in a single pass without retracting to clear chips.