Hertel 44838951 Roughing End Mill 1/2 in 4 Flute Cobalt

Product Description

The HERTEL 44838951 is a single-end roughing end mill designed for aggressive material removal in milling operations. Built from M42 cobalt high-speed steel and finished with a TiCN coating, it handles tough ferrous and non-ferrous materials where standard HSS tools wear prematurely. The 1/2 inch diameter cutter carries 4 flutes in a coarse pitch configuration, which evacuates chips efficiently during heavy roughing passes. At 3.0000 inches overall length with a 1.0000 inch length of cut, this tool is sized for standard vertical mill and machining center work. Machinists and tool-and-die professionals reach for this style of end mill when removing stock fast before a finishing pass.

This roughing end mill suits general-purpose roughing in steel, alloy steel, stainless, and cast iron applications on manual knee mills and CNC machining centers. The coarse pitch tooth geometry breaks up chips into smaller segments, reducing cutting forces and heat buildup compared to standard end mills. The right-hand cutting and right-hand flute direction are compatible with conventional spindle rotation. The 1/2 inch shank fits standard R8, ER, or side-lock toolholders common in most shop environments. No center-cutting capability means it is intended for side milling and slotting entries from an existing hole or edge.

Key Features

• M42 cobalt steel construction for heat and wear resistance in tough materials
• TiCN coating extends tool life and reduces friction at the cutting edge
• Coarse pitch, 4-flute design promotes efficient chip evacuation during heavy cuts
• Right-hand cut and right-hand helix for standard spindle direction compatibility
• Single-end configuration with 1.0000 inch length of cut and 3.0000 inch overall length
• Shank diameter tolerance of -0.0001/-0.0005 inches ensures consistent toolholder fit

Compatibility

Designed as a standard 1/2 inch shank roughing end mill compatible with R8 collets, ER collet chucks, and side-lock holders used on vertical knee mills and CNC machining centers accepting 1/2 inch tooling.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Ensure the spindle is fully stopped and the machine is powered down before seating or removing the tool from its holder. Verify the shank is clean and free of chips or burrs before tightening the holder to the manufacturer-specified torque for that toolholder type. Because this end mill is not center-cutting, do not plunge directly into solid material — begin cuts from a pre-drilled hole or the workpiece edge.