Guhring 9055250058000 Extra Length Drill Bit 5.8mm

Product Description

The GUHRING 9055250058000 is a solid carbide extra length drill bit designed for high-performance drilling in demanding industrial and machining applications. Built to Series 5525 standards and conforming to DIN 6537, this bit features a 5.8 mm cutting diameter with an h7 tolerance shank and a FIREX coating that extends tool life in abrasive and heat-generating materials. The RT100 U point geometry combines a 140-degree point angle with web thinning to promote self-centering entry and reduce thrust force. Coolant-through capability supports deep-hole drilling at a 12xD flute-to-diameter ratio. Machining professionals and tool-and-die shops install this bit for precision drilling where standard-length tooling cannot reach.

This drill bit is suited for both production machining and maintenance environments requiring deep, accurate holes. 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 straight-cylindrical shank fits standard collet chucks and drill chucks. The extra overall length of 116 mm with a 78 mm flute and 6 mm shank diameter makes this tool particularly useful in fixturing scenarios where clearance depth is a constraint.

Key Features

• Solid carbide construction for rigidity and wear resistance in ferrous and non-ferrous materials
• FIREX coating reduces friction and extends tool life in cast iron and steel
• 140-degree RT100 U point with web thinning for self-centering and reduced entry thrust
• Coolant-through design supports chip evacuation in deep-hole drilling to 69.30 mm maximum depth
• 12xD flute-to-diameter ratio provides extra reach beyond standard drill lengths
• Right-hand spiral flute with regular spiral type for consistent chip flow

Compatibility

Designed as an OEM-specification tooling component compatible with standard straight-cylindrical collet chucks and drill chucks accepting a 6 mm shank diameter. Conforms to DIN 6537 for extra length solid carbide drill bits.

Installation Notes

Installation should be performed by a qualified machinist or toolroom professional. Ensure the spindle is fully stopped and the machine is de-energized before inserting or removing the bit from the chuck. Confirm the collet or chuck bore is clean and within tolerance for a 6 mm straight-cylindrical shank before clamping. When using the coolant-through feature, verify that the machine spindle coolant system pressure and flow rate are appropriate for the cutting application before initiating a drilling cycle.