Guhring 9005020125000 Extra Length Drill Bit Hss

Product Description

The GUHRING 9005020125000 is a high-speed steel extra length drill bit engineered for deep hole drilling applications. Built to DIN 1869 standards, this Series 502 bit features a parabolic flute design and a web-thinned, tapered web configuration that promotes efficient chip evacuation in deep-bore operations. The straight-cylindrical shank measures 0.4921 inches in diameter, matching the cutting diameter for a consistent grip in standard drill chucks and collets. With a flute length of 8.071 inches and a maximum drilling depth of 7.333 inches, this bit is suited to operations where a standard-length drill simply cannot reach. It is installed and used by machinists and maintenance technicians working in production and job-shop environments.

This drill bit is designed for deep hole drilling in aluminum and other non-ferrous and ferrous workpiece materials, consistent with its K, N, and P material group ratings. The 15xD flute-to-diameter ratio supports extended-reach drilling in applications where standard-length bits fall short. The 130-degree split point and web-thinned tip reduce entry thrust and help maintain hole position. It cuts right-hand and is intended for use without coolant-through capability, making it compatible with conventional drill press, milling machine, and CNC machining center setups that rely on external flood or mist cooling.

Key Features

• DIN 1869 specification for extra length drill bit geometry and tolerances
• Parabolic flute profile promotes chip flow and reduces packing in deep holes
• Web-thinned, tapered web reduces cutting thrust at entry
• 130-degree standard point angle for aggressive penetration and accurate starting
• Diameter tolerance of +0.000 to -0.027 mm for controlled hole sizing
• Uncoated HSS construction suited to aluminum and general-purpose deep-hole work

Compatibility

Designed as an OEM-style Series 502 extra length drill bit per DIN 1869, suited for use in drill presses, milling machines, and CNC machining centers requiring deep-reach boring capability in aluminum and compatible workpiece materials.

Installation Notes

Installation is performed by machinists or qualified maintenance technicians. Secure the straight-cylindrical shank firmly in a compatible drill chuck or collet before operation, and verify runout with an indicator when tight tolerances are required. Power down and de-energize the machine fully before changing tooling. Because this bit does not have coolant-through capability, apply appropriate external flood or mist coolant during deep-hole operations to prevent heat buildup and premature wear.