Guhring 9006090063500 Drill Bit Letter E 0.25in Carbide

Product Description

The GUHRING 9006090063500 is a jobber-length drill bit sized at Letter E (0.25 inches, 0.2500 decimal inch) and manufactured from submicron-grade solid carbide with a Titanium Nitride (TiN) coating. The 150-degree split point and web-thinned, tapered web geometry reduce thrust force and allow self-centering entry without a pilot hole. Three spiral flutes in a regular helix clear chips effectively in a wide range of workpiece materials. At 2.75 inches overall length with a maximum drilling depth of 1.279 inches, it is suited for precise, short-run drilling operations where carbide rigidity and coating durability are required. Licensed tradespeople and machining specialists are the typical end users.

This drill bit is built for use in metalworking, fabrication, and precision machining environments where solid carbide tooling is specified over high-speed steel. The straight-cylindrical shank (0.25 inches, 6.35 mm) seats directly in standard drill chucks and collets without adapters. The 5xD flute-to-diameter ratio and self-centering point geometry make it well-suited for through-hole and blind-hole work in ferrous and non-ferrous metals. It conforms to DIN 6539 standards, making it compatible with production environments that require dimensionally standardized tooling. Sold individually.

Key Features

• Submicron-grade solid carbide construction for hardness and wear resistance beyond HSS
• Titanium Nitride (TiN) coating reduces friction and extends tool life
• 150-degree drill point angle with self-centering geometry eliminates need for a center punch or pilot hole
• Three-flute spiral design improves chip evacuation and surface finish quality
• Web-thinned, tapered web lowers thrust requirements and reduces heat buildup at the cutting edge
• Conforms to DIN 6539 dimensional standard for consistent fitment in production tooling setups

Compatibility

Designed as a DIN 6539-compliant Series 609 jobber-length drill bit with a 0.25-inch straight-cylindrical shank, compatible with standard drill chucks and collets accepting 0.25-inch or 6.35 mm shanks. Drill bit diameter falls within the 0.2500 to 0.3000 decimal inch size range for this series.

Installation Notes

Installation and use of solid carbide drill bits should be performed by qualified machinists or trade professionals familiar with CNC, drill press, or hand-drill operation in metal cutting applications. Ensure the spindle and chuck are clean and properly torqued before seating the shank to prevent runout, which can chip carbide tooling. Always follow applicable machine guarding requirements and wear appropriate PPE including eye protection. Do not use carbide drill bits in flex-shaft or impact-type tools not rated for rigid carbide tooling.