Guhring 9055200093400 Cobalt Stub Drill Bit Size U

Product Description

The GUHRING 9055200093400 is a cobalt stub-length (screw machine length) drill bit designed for precision drilling in metalworking and machining applications. Built to DIN 1897 standards, this Series 5520 bit features a 118-degree four-facet split point with web thinning for reduced thrust and cleaner entry. The straight-cylindrical shank measures 9.34 mm in diameter, matching the bit diameter for direct chuck mounting. With a total overall length of 84.00 mm and a flute length of 40.00 mm, the stub configuration provides added rigidity compared to jobber-length bits. This tool is sold individually and is suited for use in CNC machining centers, drill presses, and manual machines operated by machinists and tool-and-die professionals.

This drill bit is sized to Letter U, which corresponds to a decimal size range of 0.3500 to 0.4000 inches, with a nominal diameter of 9.34 mm. It is well suited for drilling aluminum and other non-ferrous materials where cobalt construction provides durability and heat resistance. The stub-length design is commonly used where workpiece clearance is limited or maximum drill rigidity is required. The 3xD flute-to-diameter ratio supports chip evacuation in shallow-to-moderate depth holes, with a maximum drilling depth of 25.99 mm (1.023 inches).

Key Features

• Cobalt tool material with coated finish for extended tool life in high-heat applications
• 118-degree four-facet split point with web thinning for reduced entry thrust and accurate self-centering
• Stub-length (DIN 1897) body provides enhanced rigidity over jobber-length alternatives
• Right-hand cut, 2-flute spiral configuration for efficient chip removal
• Straight-cylindrical shank compatible with standard drill chucks and collet systems
• Diameter tolerance of +0.000 to -0.022 mm for consistent hole sizing

Compatibility

Designed as an OEM-style replacement or direct-use drill bit conforming to DIN 1897 stub-length standards. Compatible with standard 3-jaw drill chucks and collet holders accepting a 9.34 mm straight shank. Verify spindle and chuck capacity before installation.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists familiar with cutting tool setup and safe machine operation. Ensure the drilling machine is fully powered down and the spindle is locked before securing or removing the bit from the chuck or collet. Use appropriate cutting fluid or coolant for the workpiece material, as this bit does not support through-coolant. Inspect the cutting edges and shank for damage before each use and follow applicable shop safety protocols and OSHA machine guarding standards.