Guhring 9085200079400 Screw Machine Drill Bit 5/16in

Product Description

The GUHRING 9085200079400 is a solid carbide screw machine length drill bit designed for high-performance drilling in titanium alloy and similarly demanding workpiece materials. Built to Series 8520 specifications and conforming to DIN 6537 K, this bit features a 140-degree split point (HF point type) with web thinning to reduce thrust and improve chip evacuation at entry. The 5/16 inch (0.3126 inch) diameter shank is straight-cylindrical at 8 mm, and the overall length measures 79 mm. Coolant-through capability supports extended tool life in high-heat applications. Two spiral flutes with two margins provide stable cutting action. This is a precision tool intended for installation by machinists and metalworking tradespeople working in production or maintenance environments.

This bit is suited for use in CNC machining centers, drill presses, and manual machine setups where short, rigid tooling is required. Its screw machine length geometry provides added rigidity compared to jobber-length bits, making it well matched for close-tolerance work in aerospace, industrial maintenance, and precision fabrication. The high-performance carbide grade K40 and coated finish support repeated use in abrasive and difficult-to-machine alloys, including titanium. Maximum drilling depth is 1.145 inches (29.09 mm), with a flute-to-diameter ratio of 3xD.

Key Features

• Solid carbide construction, grade K40, for durability in hard and abrasive materials
• 140-degree HF split point with web thinning reduces entry thrust and improves hole accuracy
• Coolant-through design supports heat management in high-speed or high-feed applications
• Screw machine length for increased rigidity and reduced deflection in close-tolerance drilling
• Right-hand cut, regular spiral flute with 2 margins for consistent chip control
• Conforms to DIN 6537 K with m7 diameter tolerance for precise fitment

Compatibility

Designed for use in machine tool holders and drill chucks accepting a straight-cylindrical 8 mm shank. Primary workpiece material designation is titanium alloy. Suitable for applications requiring DIN 6537 K screw machine length solid carbide tooling in the 0.3000 to 0.3500 inch diameter range.

Installation Notes

Installation and use of this tool should be performed by qualified machinists familiar with carbide tooling. Ensure the machine spindle and tool holder are clean and within tolerance before seating the shank. Verify coolant-through connections are active before initiating cuts in titanium or other high-heat materials, as running carbide dry in these alloys can cause rapid tool failure. Follow machine tool manufacturer guidelines for speed, feed, and coolant pressure settings appropriate to the workpiece material.