Guhring 9012420087300 Solid Carbide Drill Bit 0.3438 in

Product Description

The GUHRING 9012420087300 is a solid carbide screw machine length drill bit designed for high-performance drilling in cast iron and steel. Built to DIN 6539 standards, it carries a 0.3438 inch (11/32 inch) diameter with a 140-degree split point (SU point type) and a web-thinned, parallel web configuration that reduces entry force and walking. At 84 mm overall length with a 40 mm flute length, this is a stub-length format optimized for rigidity in short-reach drilling applications. The straight-cylindrical shank seats directly in standard drill chucks and collet holders. This bit is intended for installation and service by machinists, maintenance technicians, and mechanical tradespeople working on production or repair applications.

This drill bit is suited for screw machine and CNC drilling operations targeting cast iron and steel workpieces. The 3xD flute-to-diameter ratio supports chip evacuation in shallow-to-moderate depth holes up to 1.059 inches (26.91 mm). The regular spiral flute geometry handles both interrupted and continuous cuts in ferrous materials. It is a right-hand cutting tool and does not support coolant-through delivery, making it appropriate for setups relying on flood coolant or air blast from the exterior.

Key Features

• Solid carbide submicron grade construction for extended tool life in ferrous materials
• 140-degree SU split point with web thinning reduces thrust and improves self-centering
• Screw machine (stub) length format provides maximum rigidity in tight setups
• DIN 6539 standard geometry ensures dimensional consistency and toolholder compatibility
• 2-flute regular spiral design promotes efficient chip evacuation in cast iron and steel
• Coated finish for improved wear resistance and surface performance

Compatibility

Designed as a DIN 6539 Series 1242 screw machine length drill bit for use in standard straight-shank drill chucks and collet systems targeting cast iron and steel workpieces. Drill bit diameter falls within the 0.3000 to 0.3500 inch size range category.

Installation Notes

Installation and use of this tool should be performed by qualified machinists or mechanical technicians familiar with carbide tooling. Ensure the machine spindle and toolholder are clean and within runout tolerance before seating the shank, as carbide is brittle and sensitive to side-loading from misalignment. Do not use this bit for coolant-through setups, as it does not support internal coolant delivery. Apply appropriate exterior flood coolant or air blast to manage chip clearance and heat during operation.