Guhring 9005520040900 Screw Machine Drill Bit Hss

Product Description

The GUHRING 9005520040900 is a stub-length (screw machine length) twist drill bit designed for high-performance drilling in production and machining environments. Built from high speed steel with a bright/uncoated finish, this Series 552 bit features a parabolic flute geometry and a web-thinned, parallel web configuration that promotes efficient chip evacuation and reduced thrust force. The 130-degree split point angle improves self-centering on entry and reduces walking on flat or curved surfaces. With a 0.1610-inch diameter corresponding to Wire Size 20, this bit is engineered to meet DIN 1897 standards for stub-length tooling. Licensed machinists, tool-and-die workers, and CNC setup technicians are the primary users.

This drill bit is optimized for aluminum as the primary workpiece material, making it well suited for production drilling, fixture work, and prototype machining where short flute length adds rigidity and reduces deflection. The stub-length body limits overhang in tight-clearance setups. A maximum drilling depth of 0.625 inches and a flute-to-diameter ratio of 3xD keep chip load manageable at standard feed rates for non-ferrous metals. It fits standard drill chucks and collet holders that accept straight-cylindrical shanks.

Key Features

• Wire Size 20 (0.1610 inches) diameter with a tolerance of +0.000 to -0.018 mm for consistent hole sizing
• Parabolic flute design with web thinning for improved chip flow and lower thrust in aluminum
• 130-degree drill point angle enhances self-centering and reduces surface walking
• Stub-length (DIN 1897) body increases rigidity and minimizes deflection in short-reach setups
• Bright/uncoated high speed steel construction allows easy visual inspection for wear
• Right-hand cut with straight-cylindrical shank for compatibility with standard chuck and collet systems

Compatibility

Designed as an OEM-style screw machine length drill bit per DIN 1897 specification, compatible with standard drill chucks and collet holders accepting straight-cylindrical shanks of the corresponding diameter.

Installation Notes

This bit is installed and used by machinists and CNC technicians in drill press, mill, or lathe tailstock setups. Ensure the spindle and workpiece are fully secured before beginning any drilling operation. Use appropriate cutting fluid or air blast when drilling aluminum to manage heat and chip clearance, even though the bit itself is uncoated. Replace the bit when the point shows visible wear or when hole diameter tolerance can no longer be held within specification.