Cleveland C42058 Square End Mill 2 Flute Hss

Product Description

The CLEVELAND C42058 is a double-end, two-flute square end mill machined from high speed steel (HSS). It is designed for milling operations requiring a flat-bottomed cutting profile and center-cutting capability, allowing both plunge and peripheral cuts. With a 0.25-inch mill diameter, a 0.5-inch length of cut, and a 3/8-inch straight cylindrical shank with Weldon flat, this tool mounts securely in standard milling chucks and collets. The 30-degree right-hand spiral flute geometry promotes efficient chip evacuation during slotting, profiling, and shoulder milling. It is sized for general-purpose metalworking in machine shops and maintenance environments.

The C42058 is suited for cutting cast iron, non-ferrous metals, and steel in light to moderate material removal applications. The regular-length body and 3-3/8-inch overall length make it appropriate for CNC vertical mills, knee mills, and manual milling machines where standard reach is sufficient. Being uncoated HSS, it performs well in lower-speed setups and is compatible with flood coolant or cutting oil to extend tool life on ferrous materials.

Key Features

• Double-end design provides two usable cutting ends per tool
• Center-cutting capability allows direct plunge entry into the workpiece
• 30-degree right-hand spiral flute promotes chip flow and reduces heat buildup
• Weldon flat on 3/8-inch shank resists pull-out under side load
• Uncoated HSS construction is re-sharpenable and suited for general ferrous and non-ferrous work
• HD-2 series regular-length geometry balances rigidity and reach

Compatibility

Designed for use in standard milling machine spindles and toolholders accepting a 3/8-inch straight cylindrical or Weldon flat shank. Primary workpiece materials include cast iron, non-ferrous metals, and steel.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer's toolholder torque and runout specifications. Ensure the machine spindle is fully stopped and locked out before inserting or removing the end mill. Seat the shank fully in the collet or end mill holder and engage the Weldon flat set screw to prevent axial pullout. Verify tool runout with a dial indicator before beginning the cut to protect both the tool and the workpiece.