Cleveland C41231 Square End Mill 1 Inch 4 Flute Hss

Product Description

The CLEVELAND C41231 is a double-end, 4-flute square end mill manufactured from high speed steel (HSS). It carries a 1 inch cutting diameter, a 1-7/8 inch length of cut, and a 6-3/8 inch overall length with a 1 inch straight-cylindrical shank that also accepts a Weldon flat drive. The spiral flute geometry runs at a 30-degree helix angle with right-hand cut and right-hand flute orientation. Center-cutting capability allows plunge entry as well as conventional peripheral milling. This tool is part of the Cleveland HD-4C series and is intended for use by machinists and tool-and-die professionals in production and job-shop environments.

This end mill is rated for primary workpiece materials that include cast iron, non-ferrous metals, and steel. The double-end configuration provides two usable cutting ends, extending service life between tool changes. The regular-length classification and straight shank make it compatible with standard R8, CAT, BT, and collet-style toolholders commonly found on vertical milling machines and machining centers. It ships uncoated and is ready to run as received or can be used with cutting fluid for extended tool life on ferrous materials.

Key Features

• Double-end design delivers two usable cutting ends per tool
• Center-cutting geometry allows direct plunge milling without a pre-drilled entry hole
• 30-degree helix angle promotes efficient chip evacuation on cast iron, non-ferrous, and steel workpieces
• Right-hand cut and right-hand spiral flute configuration for use in standard spindle rotation
• Weldon flat on straight shank resists pullout under side-load cutting conditions
• High speed steel construction supports regrinding for cost-effective tool management

Compatibility

Designed for use on vertical mills and machining centers with 1 inch collet or Weldon-flat toolholders. Suitable for cutting cast iron, non-ferrous metals, and steel as specified by the HD-4C series application rating.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer's toolholder torque and runout specifications. Ensure the spindle and toolholder bores are clean and free of chips before seating the shank. Verify tool runout with a dial indicator after clamping. Always bring the spindle to a full stop before measuring, adjusting, or removing the end mill.