Guhring 9055140066000 Carbide Drill Bit 0.2598 in 140 Deg

Product Description

The GUHRING 9055140066000 is a solid carbide screw machine length drill bit designed for high-performance drilling in cast iron and steel. Part of the Series 5514 line and manufactured to DIN 6537K standards, it features a 0.2598-inch diameter, a 140-degree split point (SU type), and a web-thinned parallel web configuration for reduced thrust and cleaner entry. The straight-cylindrical shank measures 8.00 millimeters in diameter, and the two-flute spiral design promotes efficient chip evacuation. This bit is built for production environments where hole quality and tool life in ferrous materials are the primary concerns.

This drill bit suits metal fabrication shops, machine shops, and industrial maintenance operations working with cast iron and steel workpieces. Its screw machine length profile makes it well suited for use in drill presses, CNC machining centers, and turret lathes where short, rigid tooling is preferred. The 3xD flute-to-diameter ratio supports a maximum drilling depth of 0.9490 inches (24.10 mm), appropriate for through-holes and shallow blind holes in production runs. Licensed machinists and tool-and-die professionals will find this bit appropriate for tight-tolerance work given its diameter tolerance of +0.006 to +0.021 mm.

Key Features

• Solid carbide construction with submicron carbide grade for wear resistance in ferrous materials
• 140-degree SU split point reduces walking and improves entry accuracy
• Web-thinned parallel web lowers drilling thrust and extends tool life
• Coated finish for improved surface hardness and lubricity
• DIN 6537K specification ensures dimensional consistency
• No coolant-through design — suitable for dry or externally lubricated setups

Compatibility

Designed for drilling cast iron and steel workpieces. Compatible with standard 8.00 mm straight-cylindrical shank toolholders, collet chucks, and drill press spindles accepting that shank diameter. Fits within the 0.2500 to 0.3000 inch drill bit size range for standard toolholder indexing.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and locked out before inserting or removing the bit from the toolholder. Secure the straight-cylindrical shank fully within the collet or chuck to the recommended grip depth to prevent pullout under load. Because this bit has no coolant-through capability, apply external cutting fluid or mist lubrication appropriate for the workpiece material when drilling steel to manage heat and chip flow.