Guhring 9085210080000 Solid Carbide Jobber Drill Bit 8 Mm

Product Description

The GUHRING 9085210080000 is a solid carbide jobber length drill bit engineered for high-performance drilling in demanding materials. Part of the Guhring Series 8521, it carries a nano-SI coating and features a 140-degree HF drill point optimized for self-centering entry without a center punch. The straight-cylindrical shank measures 8 mm in diameter with an overall length of 91 mm (approximately 3.58 inches) and a flute length of 53 mm (approximately 2.09 inches). With coolant-through capability and a web-thinned tip, it maintains cutting efficiency at depth and extends tool life in abrasive alloy applications. Licensed machinists and toolroom technicians typically specify this bit for precision production and job shop work.

This drill bit is designed primarily for titanium alloy workpieces (material code P; S) and similar high-strength, work-hardening materials encountered in aerospace, medical device, and industrial manufacturing environments. The right-hand spiral flute geometry with a regular spiral type evacuates chips effectively in deep-hole applications, with a maximum drilling depth of 41 mm (approximately 1.61 inches). The 5xD flute-to-diameter ratio supports stable performance across CNC machining centers and conventional drill presses where tight diameter tolerances are required.

Key Features

• Solid carbide construction with nano-SI coating for wear resistance in titanium and hard alloys
• 140-degree HF point angle with web thinning for self-centering entry and reduced thrust force
• Coolant-through design delivers cutting fluid directly to the tip for extended tool life at depth
• 8 mm straight-cylindrical shank (DIN 6535) with m7 diameter tolerance for precise chuck fit
• Conforms to DIN 6537 L jobber length standard ensuring dimensional consistency
• Right-hand cut, 2-flute spiral geometry for efficient chip evacuation in deep-hole drilling

Compatibility

Designed as an OEM-style precision drill bit conforming to DIN 6537 L and DIN 6535 standards, suitable for use in standard 8 mm collets, chucks, and toolholders on CNC machining centers and conventional drill presses. Sized within the 8.00 to 9.00 mm drill bit range per Series 8521 specifications.

Installation Notes

Installation and use of this bit should be performed by qualified machinists familiar with carbide tooling procedures. Always verify that the machine spindle and toolholder are clean and free of runout before seating the shank, as carbide is brittle and susceptible to fracture under lateral load. Ensure coolant-through supply is active before drilling titanium or hard alloys to prevent heat buildup and premature edge failure. Do not use this bit for hand drilling or in underpowered machines that cannot maintain consistent feed and speed rates.