Guhring 9055250042000 Extra Length Drill Bit 0.1654 in

Product Description

The GUHRING 9055250042000 is a solid carbide extra length drill bit engineered for high-performance drilling in demanding production environments. Built to DIN 6537 standards, this Series 5525 bit features a 0.1654-inch (4.20 mm) diameter, a 140-degree drill point angle, and a FIREX coating that extends tool life in abrasive materials. The spiral flute geometry promotes efficient chip evacuation, while the web-thinned, tapered web design reduces entry force and improves self-centering at the point. Coolant-through capability allows internal delivery of cutting fluid directly to the cutting zone, making this bit well-suited for deep-hole operations in metalworking and machining applications.

This drill bit is designed for use on CNC machining centers, drilling machines, and similar production equipment where consistent hole quality at extended depths is required. Primary workpiece materials include cast iron and steel (ISO material codes K and P). Secondary applications cover aluminum, titanium alloy, and other materials under ISO codes H, M, N, and S. The 12xD flute-to-diameter ratio supports a maximum drilling depth of 2.272 inches (57.70 mm), making it a practical choice for through-hole and deep blind-hole work in ferrous and non-ferrous components.

Key Features

• Solid submicron carbide construction for rigidity and wear resistance in hard materials
• FIREX coating reduces friction and extends tool life in steel and cast iron
• Coolant-through design delivers cutting fluid internally at the cutting edge
• 140-degree standard point angle with web thinning for self-centering entry
• Straight-cylindrical shank (0.2362 inches) compatible with standard drill chucks and collets
• DIN 6537 compliant; meets California Proposition 65 documentation standards

Compatibility

Designed as an OEM-style replacement or direct tooling selection for CNC drilling and machining applications requiring a 4.20 mm diameter solid carbide extra length drill bit with a straight-cylindrical shank per DIN 6537.

Installation Notes

Installation and tool changes should be performed by a qualified machinist or tooling technician with the machine in a full stop and energy-isolated state per applicable lockout/tagout procedures. Ensure the straight-cylindrical shank is secured in a properly sized collet or drill chuck and that runout is within acceptable tolerance before beginning a cut. Verify that coolant-through supply pressure and flow rate are appropriate for the application before engaging the spindle. Do not exceed the rated maximum drilling depth of 2.272 inches in a single pass without a chip-clearing retract cycle.