Guhring 9055250115000 Extra Length Drill Bit Solid Carbide

Product Description

The GUHRING 9055250115000 is a solid carbide extra length drill bit engineered for high-performance drilling in demanding industrial and metalworking applications. It measures 11.50 mm (0.4528 inches) in diameter with an overall length of 204.00 mm and a flute length of 156.00 mm, giving it a 12xD flute-to-diameter ratio suited for deep-hole work. The bit features a 140-degree standard point angle, web-thinned tapered web geometry for self-centering entry, and a FIREX coating for extended tool life under aggressive cutting conditions. Coolant-through capability keeps temperatures controlled during deep passes. Two right-hand spiral flutes provide efficient chip evacuation. This bit is installed by machinists and tool-and-die technicians working on production or maintenance drilling operations.

This drill bit is designed primarily for use in cast iron and steel (ISO material codes K and P), with secondary suitability for aluminum and titanium alloys (ISO codes H, M, N, and S). The Series 5525 geometry with facet point grinding and web thinning makes it well suited for CNC machining centers and manual drill presses where hole accuracy and chip control are critical. The straight-cylindrical shank seats directly in standard ER collets or drill chucks without adapters. Maximum drilling depth is 138.75 mm (5.4630 inches).

Key Features

• Solid carbide submicron-grade construction for rigidity and wear resistance in hard materials
• FIREX coating reduces friction and heat buildup, extending tool life in ferrous materials
• Coolant-through design delivers cutting fluid directly to the tip during deep-hole drilling
• 140-degree standard point with web thinning and facet point grinding for self-centering and reduced thrust
• 12xD flute-to-diameter ratio supports drilling depths up to 138.75 mm (5.4630 inches)
• Right-hand cutting with regular spiral flutes for consistent chip evacuation

Compatibility

Designed as a high-performance replacement-style extra length drill bit for applications in cast iron and steel as primary workpiece materials, with secondary compatibility in aluminum and titanium alloys. Conforms to DIN 6537 standards. Suitable for use in CNC machining centers and manual drill presses equipped with standard straight-cylindrical shank toolholding systems.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and locked out before mounting or removing the bit. Seat the straight-cylindrical shank fully and evenly in the collet or chuck to the specified grip length before tightening. Verify coolant-through lines are clear and delivering adequate flow before beginning deep-hole operations, and confirm workpiece fixturing is secure to prevent deflection at depth.