Guhring 9085210115100 Carbide Drill Bit 29/64 Inch

Product Description

The GUHRING 9085210115100 is a solid carbide jobber length drill bit designed for high-performance drilling in demanding production environments. Sized at 29/64 inch (0.4531 inch decimal), it features a 140-degree split point with web thinning for fast, accurate entry without a center punch. The nano-SI coating reduces friction and extends tool life in abrasive and hard materials. With coolant-through capability and a 2-flute spiral design rated at a 5xD flute-to-diameter ratio, this bit is built for deep-hole drilling at elevated feed rates. It is installed by machinists and tool-and-die professionals working on CNC machining centers and production drill presses.

This drill bit is suited for drilling ferrous and non-ferrous metals, hardened steels, cast iron, and composite materials where standard high-speed steel tooling fails to hold geometry or tool life. The coolant-through design makes it a strong fit for through-spindle coolant setups on CNC vertical machining centers, horizontal machining centers, and gang-drill fixtures. The HF point type and web-thinned geometry reduce thrust load and improve chip evacuation in blind and through-hole applications. Professionals in aerospace, automotive, mold and die, and general precision machining will find this bit appropriate for tight-tolerance work.

Key Features

• Solid carbide construction with nano-SI coating for extended tool life in hard and abrasive materials
• 140-degree HF point angle with web thinning for reduced thrust and self-starting entry
• Coolant-through design compatible with through-spindle coolant systems
• 2-flute spiral geometry with 5xD flute-to-diameter ratio for efficient chip evacuation in deeper holes
• Right-hand cut, regular spiral for standard CNC and manual drill press operation
• DIN specification designation for dimensional consistency and toolholder compatibility

Compatibility

Designed as a high-performance replacement-style jobber drill for CNC machining centers and production drilling equipment equipped with through-spindle coolant and toolholders accepting a 12 mm shank diameter.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Ensure the machine spindle is fully stopped and locked out before loading or removing the bit from the toolholder. Verify toolholder runout is within acceptable limits before use, as carbide tooling is sensitive to eccentric loading. Confirm through-spindle coolant pressure and flow rate are appropriate for the material and feed rate before beginning the drilling cycle.