Kennametal 3742545 Square-shoulder End Mill 1in 4 Flute

Product Description

The KENNAMETAL 3742545 is an indexable square-shoulder end mill designed for precision milling operations in metalworking and machining environments. Built on a cylindrical shank, this tool accepts EC10.. and EP10.. style inserts secured by screw-type insert holding, delivering consistent cutting performance across a range of ferrous and non-ferrous materials. The 1-inch cutting diameter and 0 degree lead angle make it well-suited for true 90-degree shoulder milling. A through-coolant design with a 0.236-inch coolant hole diameter supports chip evacuation and thermal management at elevated spindle speeds. Licensed machinists and CNC setup technicians are the primary users of this toolholder platform.

This end mill is configured as a Mill 1-10 toolholder and carries the ISO designation M1D100E1004C100L800. With a maximum depth of cut of 0.395 inches and a maximum spindle speed of 39,700 RPM, it fits high-speed machining centers used in production and job-shop environments. The 8-inch overall length and 1.636-inch head length provide reach for shoulder and face milling applications where extended tool projection is required. Four insert pockets allow for efficient material removal in roughing and semi-finishing passes.

Key Features

• Indexable square-shoulder design with 0 degree lead angle for true 90-degree wall milling
• 4-flute, 4-insert configuration supports aggressive material removal rates
• Through-coolant capable with 0.236-inch coolant hole diameter for chip evacuation and heat control
• Screw-type insert clamping for positive insert retention and repeatable positioning
• Compatible with EC10.. and EP10.. insert styles for broad material application coverage
• Maximum spindle speed of 39,700 RPM suits high-speed CNC machining center use

Compatibility

Designed for use with EC10.. and EP10.. series insert styles. Configured as a Mill 1-10 toolholder per the ISO designation M1D100E1004C100L800.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Ensure the machine spindle is powered down and locked out before loading or changing inserts. Use the appropriate Torx or hex key for the insert clamping screws and confirm each insert is fully seated before spindle engagement. Verify through-coolant line connections and pressure settings are compatible with the machine tool before operation.