Guhring 9055100087000 Screw Machine Drill Bit 0.3425in

Product Description

The GUHRING 9055100087000 is a solid carbide screw machine length drill bit designed for high-performance drilling in demanding production environments. It measures 0.3425 inches (8.70 mm) in diameter with a 140-degree split point (SU type) that reduces thrust and improves centering at entry. The bit runs with two spiral flutes in a regular helix configuration and features a web-thinned, parallel-web construction that keeps chip evacuation efficient under load. Coolant-through capability makes this bit well suited for continuous-duty CNC machining cycles where heat management is critical. A straight-cylindrical shank seats directly in standard chucks and collets. Overall length is 3.50 inches (89.00 mm), with a flute length of 1.85 inches (47.00 mm) and a maximum drilling depth of 1.73 inches (44.00 mm).

This drill bit is intended for cutting cast iron and steel in screw machine and CNC machining center applications. The screw machine length format provides a shorter, more rigid profile compared to jobber-length bits, which reduces deflection in high-feed, close-tolerance drilling operations. It is rated as a high-performance grade and conforms to DIN 6537 K standards, making it appropriate for production shops, job shops, and industrial maintenance operations where tight hole tolerances and consistent tool life are required. A licensed machinist or CNC operator would typically deploy this bit in a gang-drilling or turret-lathe setup.

Key Features

• Solid submicron carbide construction for extended tool life in ferrous materials
• 140-degree SU split point reduces entry thrust and self-centers without a pilot
• Coolant-through design supports high-speed continuous drilling cycles
• Web-thinned parallel web improves chip flow and reduces torque demand
• Diameter tolerance of +0.006 to +0.021 mm for close-tolerance hole production
• Conforms to DIN 6537 K specification for dimensional consistency

Compatibility

Designed as a DIN 6537 K screw machine length drill bit for use in cast iron and steel workpieces. The 10.00 mm straight-cylindrical shank fits standard ER collet chucks, drill chucks, and screw machine turret tooling sized for that shank diameter. No specific machine model compatibility was provided by the manufacturer for this part number.

Installation Notes

This bit is installed by a machinist or CNC operator and should be seated fully and evenly in the collet or chuck before tightening to the tool manufacturer's specified retention torque. Confirm coolant-through passages are clear and that coolant pressure is set to the machine and toolholder specification before initiating a cut. Do not exceed the recommended feed and speed parameters for the workpiece material — carbide is brittle and susceptible to chipping if subjected to interrupted cuts or excessive runout. Inspect shank and flutes for chips or damage before each use.