Guhring 9056740095250 Countersink 3/8 in 82 Deg 3 Flute Tialn

Product Description

The GUHRING 9056740095250 is a single-end countersink designed for deburring, chamfering, and seat preparation in ferrous and hard metals. Built from cobalt steel with a TiAlN coating, it handles elevated cutting temperatures and abrasive materials that would quickly degrade standard high-speed steel tools. The 82-degree included angle is the standard for flat-head fastener seating in North American applications. Three flutes provide a balance of chip clearance and cutting stability. The straight cylindrical shank measures 1/4 inch, fitting standard collet chucks and drill press keyless chucks. Overall length is 2 inches. Installed and resharpened by machinists, tool-and-die technicians, and maintenance mechanics.

This countersink is rated for use in cast iron, stainless steel, and steel. It is suited for production and maintenance work where consistent chamfer geometry is required on fastener holes. The right-hand cut configuration is compatible with standard drill press and CNC spindle rotation. No pilot is included, so the operator controls centering through workpiece fixturing or a center-punch start. Minimum cut diameter is 0.09 inches, and maximum head diameter is 3/8 inches, making it appropriate for smaller fastener sizes common in light structural and mechanical assemblies.

Key Features

• Cobalt steel construction resists heat buildup during aggressive cuts in stainless and cast iron
• TiAlN coating extends tool life in high-temperature cutting environments
• 82-degree included angle matches the standard flat-head screw seat geometry
• Three-flute design balances chip evacuation and surface finish quality
• 1/4 inch straight cylindrical shank fits standard collet chucks and drill press accessories
• Pilotless single-end design allows use across a range of hole diameters within tool capacity

Compatibility

Rated for countersinking operations in cast iron, stainless steel, and steel. Fits any spindle or chuck accepting a 1/4 inch straight cylindrical shank. No specific OEM replacement compatibility is stated for this part.

Installation Notes

Secure the workpiece firmly before operation to prevent walking on entry. Power down and de-energize the machine before changing or inspecting the tool. Use appropriate cutting fluid or coolant when working stainless steel to manage heat and extend tool life. This tool should be installed and operated by trained machinists or maintenance technicians familiar with rotary cutting tool safety practices.