Kennametal 3742538 Indexable Square Shoulder End Mill

Product Description

The KENNAMETAL 3742538 is an indexable square-shoulder end mill designed for high-precision milling operations in metal cutting applications. Built around the Cutter Style Mill 1-10 platform, this tool accepts two EC10 or EP10 series inserts secured by screw clamping. It delivers a 3/4-inch cutting diameter with a maximum depth of cut of 0.398 inches and a lead angle of zero degrees, making it well suited for true 90-degree shoulder milling. Through-coolant capability is standard, supporting heat management and chip evacuation at elevated spindle speeds up to 45,900 RPM. Installed by machinists and tool-and-die professionals in CNC machining centers, this body is a direct-mount solution for shops requiring repeatability in shoulder, slot, and peripheral milling.

This end mill body is used in vertical and horizontal CNC machining centers performing square-shoulder milling on ferrous and non-ferrous workpiece materials. The 3/4-inch cylindrical shank interfaces directly with standard ER or end-mill-style holders. With an overall length of 6.7 inches and a head length of 1.25 inches, this tool fits standard reach requirements in medium-duty milling setups. Applications include face milling, shoulder profiling, and step milling where a clean 90-degree wall is required.

Key Features

• Zero-degree lead angle produces true 90-degree square shoulders in a single pass
• Accepts two EC10 or EP10 series inserts with screw-lock insert holding method
• Through-coolant design with 0.236-inch coolant hole diameter for direct cutting zone cooling
• Maximum spindle speed of 45,900 RPM supports high-efficiency machining strategies
• 3/4-inch cylindrical shank for compatibility with standard end mill holders
• 6.7-inch overall length and 1.25-inch head length for medium-reach applications

Compatibility

Designed for use with EC10 and EP10 series indexable inserts. No additional compatible model or system information was provided in the product data.

Installation Notes

This tool body is installed and serviced by qualified machinists or tooling setup technicians. Before changing inserts or mounting the tool body, ensure the machine spindle is fully stopped and the control is in an e-stop or locked-out state following applicable OSHA lockout/tagout procedures. Confirm the coolant port is clear before engaging through-coolant flow. Do not exceed the rated maximum RPM of 45,900 as stated in the tool body specification.