Cleveland C42065 Square End Mill 3/8 Inch 2 Flute Hss

Product Description

The CLEVELAND C42065 is a double-end, square-profile end mill designed for precision milling operations in metalworking and machining applications. Built from high speed steel (HSS), it features a 3/8 inch diameter cutting profile with a 9/16 inch length of cut and a 3-1/2 inch overall length. The 30-degree spiral flute geometry promotes efficient chip evacuation and smooth cutting action. With two right-hand flutes and a centercutting design, this tool handles both peripheral and plunge cuts. It is an uncoated, straight-shank tool suited for manual mills, CNC knee mills, and bench-top machining centers. Installation and operation are typically handled by machinists and toolroom professionals.

The C42065 is engineered for use on cast iron, non-ferrous metals, and steel workpieces, making it a versatile choice in job shop and production machining environments. The double-end configuration extends tool life by providing a second cutting end once the first shows wear. The HD-2 series designation indicates a heavy-duty, general-purpose profile suited for conventional milling operations where HSS tooling is preferred over carbide, particularly in interrupted cuts or lower-speed setups where toughness matters more than hardness.

Key Features

• Double-end design provides two usable cutting ends per tool
• Centercutting geometry allows direct plunge entry into the workpiece
• 30-degree helix angle promotes chip flow and reduces chatter
• Right-hand cut and right-hand flute for standard spindle direction
• Straight cylindrical shank with Weldon flat for secure tool holding
• Uncoated HSS construction offers toughness in interrupted or variable-load cuts

Compatibility

Designed for use on cast iron, non-ferrous metal, and steel workpieces. Compatible with standard 3/8 inch end mill holders, collet chucks, and Weldon-flat set-screw holders used on vertical knee mills, bed mills, and CNC machining centers.

Installation Notes

Installation is performed by qualified machinists. Ensure the spindle is fully stopped and machine power is locked out before changing tooling. Seat the shank fully into the holder and tighten the set screw against the Weldon flat to the holder manufacturer's specification. Verify runout with a dial indicator before cutting, particularly when close-tolerance work is required.