Cleveland C41386 Square End Mill 3/8 in 4 Flute Hss

Product Description

The CLEVELAND C41386 is a 4-flute, right-hand cut square end mill designed for material removal and profiling operations in metalworking applications. Built from high speed steel, it delivers consistent cutting performance across cast iron, non-ferrous metals, and steel. The tool measures 3/8 inch in diameter with a 2-1/2 inch length of cut and a 4-1/4 inch overall length, placing it in the extra-long category. A 30-degree helix angle promotes efficient chip evacuation and smooth cutting action. The centercutting geometry allows both plunge and peripheral milling operations. This end mill is uncoated and fits straight-cylindrical or Weldon flat toolholders.

The C41386 is suited for general-purpose milling on manual mills, CNC machining centers, and knee mills found in job shops, production facilities, and maintenance shops. Its extra-long length of cut makes it well suited for deep-pocket machining, slotting, and side milling where standard-length end mills cannot reach. The 3/8 inch shank allows use in collet chucks, end mill holders, and side-lock holders with matching bore sizes. Applications include ferrous and non-ferrous workpieces where uncoated HSS tooling is the appropriate choice.

Key Features

• 3/8 inch cutting diameter with matching 3/8 inch straight shank, compatible with Weldon flat toolholders
• 4 flutes with spiral geometry and 30-degree helix angle for efficient chip evacuation
• 2-1/2 inch length of cut rated for deep-pocket and slotting operations
• Centercutting design enables direct plunge entry without pre-drilling
• Right-hand cut, right-hand flute configuration for standard spindle rotation
• High speed steel construction suitable for cast iron, non-ferrous metal, and steel workpieces

Compatibility

Designed for use in straight-cylindrical and Weldon flat toolholders with a 3/8 inch bore. Suitable for milling cast iron, non-ferrous metals, and steel workpieces per Series HG-4C application guidelines.

Installation Notes

Installation is performed by machinists or toolroom technicians. Ensure the machine spindle is fully stopped and locked out before inserting or removing end mills from the toolholder. Verify holder bore size and setscrew engagement to the Weldon flat before starting the cut. Do not exceed the recommended depth of cut for the workpiece material and machine rigidity.