Guhring 9005520123000 Drill Bit 31/64 Inch Hss Series 552

Product Description

The GUHRING 9005520123000 is a screw machine length (stub) drill bit designed for high-performance drilling in steel, aluminum, and non-ferrous materials. It measures 31/64 inches (0.4844 inches) in diameter with a 4-1/32-inch overall length and a 130-degree cone-relief point angle. The parabolic flute geometry with web thinning promotes fast chip evacuation and reduces thrust in demanding production environments. Ground to DIN 1897 standards, this bit is suited for machinists, tool-and-die tradespeople, and production drilling operations where dimensional accuracy and consistent performance are required.

This drill bit fits production machining and shop-floor applications where stub-length rigidity is preferred over jobber-length reach. Its straight cylindrical shank seats in standard drill chucks and quick-change tooling. The right-hand cutting direction and fast-spiral parabolic flute are optimized for drilling steel and aluminum in CNC machining centers, drill presses, and manual machine tools. The bright uncoated finish is appropriate for general-purpose applications where additional coating is not required.

Key Features

• 31/64 inch (0.4844 inches) diameter with diameter tolerance of +0.000 to -0.027 mm for precise hole sizing
• 130-degree cone-relief point with web thinning reduces entry thrust and improves centering
• Parabolic fast-spiral flute geometry promotes efficient chip removal during deep passes
• Stub/screw machine length (4-1/32 inches OAL) provides added rigidity versus jobber-length bits
• High-speed steel (HSS) construction rated for steel, aluminum, and non-ferrous workpiece materials
• Manufactured to DIN 1897 specification for consistent geometry and interchangeability

Compatibility

Designed as an OEM-style replacement or direct-use drill bit for production drilling operations requiring a DIN 1897 stub-length drill in 31/64 inch diameter. Compatible with standard drill chucks and quick-change holders accepting a 0.4844-inch straight cylindrical shank.

Installation Notes

Installation and operation should be performed by qualified machinists or tooling technicians familiar with rotary cutting tools. Ensure the drill chuck or toolholder is clean and properly tightened before operation, and verify spindle speed and feed rate are appropriate for the workpiece material. Do not exceed the rated maximum drilling depth of 1.281 inches per pass without retracting to clear chips. Inspect the cutting edges for wear or chipping before each use.