Guhring 9038390120000 Square End Mill 0.472 in 4 Flute Carbide

Product Description

The GUHRING 9038390120000 is a solid carbide square end mill engineered for demanding metal-removal applications in ferrous and hard materials. Built on the GUHRING Series 3839 platform, it features a 0.472 inch (12 mm) mill diameter, a 1.417 inch (36 mm) length of cut, and four spiral flutes with a variable helix design that reduces harmonic chatter during high-feed milling. The FIREX coating provides thermal and wear resistance at elevated cutting temperatures. The straight cylindrical shank measures 0.4724 inches (12 mm) in diameter with an h6 tolerance, ensuring a secure toolholder grip. This is a single-end, centercutting tool with right-hand cut and right-hand flute geometry. Overall length is 93 mm. Intended for use by machinists and CNC tooling specialists in production and job-shop environments.

This end mill is designed primarily for milling cast iron and steel, with secondary suitability for hard materials, stainless steel, and high-temperature alloys. The long-length configuration and 46 mm reach length make it well suited for pocketing, slotting, and profiling operations where additional reach beyond a standard stub or regular series tool is required. The variable helix angles of 35 and 38 degrees help manage cutting forces and improve surface finish in interrupted cuts or where thin walls are present. No coolant-through capability; external coolant or air blast is the typical delivery method for this configuration.

Key Features

• Solid carbide construction with proprietary material grade for extended tool life in steel and cast iron
• FIREX coating for high thermal resistance and reduced built-up edge
• Variable helix (35 and 38 degrees) reduces chatter and improves finish in demanding cuts
• Centercutting geometry allows plunge entry without a pre-drilled hole
• Long-series reach length of 46 mm suits deep-pocket and profiling work
• Straight cylindrical shank with h6 tolerance for consistent toolholder runout

Compatibility

Designed as an OEM-specification replacement or direct-use tooling for standard straight-bore end mill holders and collet chucks accepting a 12 mm (0.4724 inch) cylindrical shank. Primary workpiece material compatibility per GUHRING Series 3839 data: cast iron (K) and steel (P); secondary compatibility includes hard materials (H), stainless steel (M), and high-temperature alloys (S).

Installation Notes

Installation requires a compatible end mill holder, collet chuck, or shrink-fit holder rated for a 12 mm shank diameter. Verify toolholder runout with a dial indicator before initiating a production run, as excessive runout accelerates tool wear and degrades surface finish. Secure the shank to the full recommended engagement depth of the holder. This tool has no coolant-through capability, so confirm that external coolant or air-blast delivery is positioned appropriately before cutting.