Cleveland C41243 Square End Mill 4 Flute Hss

Product Description

The CLEVELAND C41243 is a 4-flute, square-end, single-end mill manufactured from high speed steel (HSS) for general-purpose metal removal in milling operations. It features a 0.125 inch cutting diameter, a 0.375 inch length of cut, and a 0.375 inch straight-cylindrical shank with a Weldon flat for positive drive engagement. The 30-degree helix angle promotes efficient chip evacuation and smooth cutting action. Center-cutting geometry allows the tool to plunge directly into the workpiece. This tool is installed and operated by machinists and toolmakers using vertical or CNC milling equipment.

The C41243 is suited for milling cast iron, non-ferrous metals, and steel in both manual and CNC machining environments. Its regular-length profile and compact 2.3125 inch overall length make it well suited for tight-clearance work and shorter-reach applications. Right-hand cut and right-hand flute configuration match standard spindle rotation on most milling machines. The uncoated HSS construction is appropriate for lower-speed operations and materials that do not demand carbide or coated tooling.

Key Features

• 4-flute spiral configuration for improved surface finish on ferrous and non-ferrous materials
• Center-cutting design allows direct plunge entry without pre-drilling
• 30-degree helix angle for efficient chip flow and reduced cutting force
• Weldon flat on straight-cylindrical shank prevents tool pullout under load
• Uncoated HSS construction compatible with standard cutting fluids and coolants
• Series HG-4C regular-length profile for general-purpose slot and profile milling

Compatibility

Designed for use on vertical milling machines and CNC machining centers accepting a 0.375 inch straight-cylindrical or Weldon flat shank. Rated for primary workpiece materials including cast iron, non-ferrous metals, and steel per material codes K, N, and P.

Installation Notes

Installation is performed by a qualified machinist or toolroom technician. Secure the shank fully within the collet or end mill holder, aligning the Weldon flat to the set screw for positive drive. Confirm spindle speed and feed rate are appropriate for the workpiece material and tool diameter before engaging the cut. Inspect the cutting edges for wear or chipping before each use and replace the tool if damage is present.