Guhring 9006590054000 Cobalt Drill Bit 5.40mm Series 659

Product Description

The GUHRING 9006590054000 is a screw machine length (stub) drill bit built for cutting titanium alloys and other demanding workpiece materials. Manufactured from M35 cobalt high-speed steel and finished with a TiN tip coating, this bit provides heat and wear resistance where standard HSS tooling falls short. The 130-degree split point angle with web thinning reduces thrust force and improves self-centering on entry. It runs a straight-cylindrical shank at 5.40 mm diameter and conforms to DIN 1897 standards. Licensed HVAC techs, machinists, and tool-room pros working in aerospace, industrial maintenance, or precision fabrication will find this bit suited to close-tolerance hole production.

This drill bit is sized at 5.40 mm (0.2126 inches) diameter and falls within the 5.00 to 6.50 mm size range of the Series 659 lineup. The stub-length format keeps the bit rigid and minimizes deflection in shallow-depth applications. Maximum drilling depth is 1.1024 inches (28.00 mm), making it appropriate for through-holes and blind holes in structural and exotic metal components where a full-length bit would introduce unnecessary flex. The regular spiral, two-flute design promotes chip evacuation in right-hand rotation setups.

Key Features

• M35 cobalt steel construction with TiN drill tip coating for extended tool life in hard and exotic alloys
• 130-degree point angle with web thinning for reduced entry thrust and improved hole accuracy
• Stub (screw machine) length format provides rigidity and minimizes deflection
• Straight-cylindrical shank at 5.40 mm for use in standard drill chucks and collet holders
• Tapered web and 3xD flute-to-diameter ratio support efficient chip clearing
• Conforms to DIN 1897 specification for consistent dimensional standards

Compatibility

Designed as a DIN 1897 stub-length replacement drill bit for use in drill presses, CNC machining centers, and hand-held drilling equipment accepting a 5.40 mm straight-cylindrical shank. Intended primary workpiece material is titanium alloy; the TiN coating also supports use in stainless steel and high-hardness ferrous materials.

Installation Notes

Secure the shank fully in the chuck or collet before operation and verify runout before cutting. Power down and lock out the machine spindle before changing or inspecting tooling. Use appropriate cutting fluid or coolant for the workpiece material, as this bit does not support through-coolant delivery. Follow the machine manufacturer and applicable ANSI or shop-safety guidelines for drilling speed and feed rates based on workpiece material and bit diameter.