Guhring 9002230111100 7/16 in Stub Drill Bit Hss

Product Description

The GUHRING 9002230111100 is a stub-length (screw machine length) twist drill bit designed for high-productivity metal drilling in production and job-shop environments. Built to DIN 1897 standards from high speed steel (HSS) with a coated finish, this right-hand cut bit features a 118-degree standard point angle, a web-thinned tip for easier penetration, and a parallel web configuration that maintains rigidity throughout the cut. At 7/16 inch (0.4375 inches) in diameter, it delivers a maximum drilling depth of 1.194 inches (30.34 mm) with consistent hole quality. Licensed HVAC, plumbing, electrical, and general mechanical contractors reach for stub-length bits when clearance is tight and rigidity matters.

This drill bit is suited for drilling cast iron and steel in residential and commercial maintenance, mechanical fabrication, and trade installation work. The shortened flute and overall stub-length geometry reduce deflection compared to jobber-length bits, making it a practical choice when working in confined spaces or on drill presses where runout control is critical. The straight-cylindrical shank is compatible with standard three-jaw drill chucks across benchtop and portable drill platforms.

Key Features

• DIN 1897 stub-length geometry reduces deflection and improves hole accuracy in steel and cast iron
• 118-degree standard point angle with web-thinned tip for reduced thrust force at entry
• 2-flute regular spiral design promotes efficient chip evacuation in ferrous materials
• Coated HSS construction extends cutting edge life versus uncoated HSS
• Straight-cylindrical shank fits standard three-jaw chucks without adapters
• Diameter tolerance of +0.000 to -0.027 mm for consistent, repeatable hole sizing

Compatibility

Designed as an OEM-style stub-length drill bit for use in standard three-jaw drill chucks; suitable for drilling cast iron and steel per DIN 1897 specification, fitting bits in the 0.4000 to 0.4500 inch diameter range for Series 223 tooling.

Installation Notes

Installation and use should be performed by qualified tradespeople familiar with machine tool operation and metal cutting safety. Always secure the workpiece before drilling and ensure the drill chuck is fully tightened. Inspect the cutting edge before each use and replace worn bits to prevent tool breakage or out-of-tolerance holes. Coolant-through is not supported on this bit; use appropriate external cutting fluid for ferrous materials when required.