Guhring 9005520138900 35/64 in Hss Screw Machine Drill Bit

Product Description

The GUHRING 9005520138900 is a screw machine length (stub) drill bit engineered for high-performance metal removal in production and job shop environments. Built from high speed steel with a bright/uncoated finish, it features a parabolic flute geometry that improves chip evacuation and reduces heat buildup at the cutting edge. The 130-degree point angle provides a self-centering, aggressive entry suited to a range of metallic workpieces. At 0.5469 inches (35/64 inch) in diameter with an overall length of 4-7/32 inches, this bit is sized for stub-length applications where rigidity and reduced deflection are priorities. A right-hand cut and web-thinned geometry round out the design. Licensed HVAC techs, machinists, and trade professionals working with aluminum and similar materials will find this bit suited to short-hole, high-precision drilling tasks.

This bit is designed for stub-length drilling applications where a shorter flute length improves rigidity and hole accuracy. With a maximum drilling depth of 1.306 inches, it is best suited for through-holes and shallow blind holes in aluminum and comparable workpieces. The straight-cylindrical shank fits standard drill chucks across benchtop drill presses, CNC machining centers, and hand-held power drills. Its 3xD flute-to-diameter ratio supports efficient chip clearing without excessive flute length. The Series 552 designation and DIN 1897 standard compliance make it a direct match for shops sourcing to those specifications.

Key Features

• 35/64 inch (0.5469 inch) diameter with a tight tolerance of +0.000 to -0.027 mm for accurate hole sizing
• Parabolic flute profile promotes fast, clean chip evacuation, reducing recutting and heat
• 130-degree split point with web thinning reduces thrust force and improves self-centering on entry
• Stub length (screw machine length) increases rigidity and minimizes deflection in short-hole applications
• High speed steel construction withstands the friction and heat of repeated drilling cycles
• DIN 1897 compliant, Series 552 designation for standardized sourcing and replacement

Compatibility

Designed as an OEM-style replacement or direct-source stub drill conforming to DIN 1897 specifications; compatible with any standard drill chuck or CNC tool holder accepting a straight-cylindrical shank at 0.5469 inch diameter.

Installation Notes

Install and remove drill bits only with the spindle fully stopped and the machine powered down or locked out per applicable OSHA lockout/tagout procedures. Secure the straight-cylindrical shank firmly in the chuck before operation to prevent slippage. Use appropriate cutting fluid or coolant for the workpiece material to extend tool life, even though this bit does not include through-coolant capability. Inspect the cutting edges for wear or chipping before each use and replace the bit if the point is compromised.