Hertel 75987735 Roughing End Mill 3/4 in 3 Flute Cobalt

Product Description

The HERTEL 75987735 is a single-end roughing end mill designed for aggressive material removal in milling operations. Built from M42 cobalt high-speed steel, it carries a TiCN coating that extends tool life in ferrous and abrasive materials. The 3/4-inch diameter cutter runs 3 flutes in a coarse pitch configuration, which clears chips efficiently and reduces heat buildup during heavy cuts. The tool is center-cutting, meaning it can be plunged directly into a workpiece. With a 3-inch length of cut and 5.25-inch overall length, it suits deep-pocket and profile milling on standard vertical mills and CNC machining centers.

This end mill is suited for roughing passes on steel, stainless steel, and other tough alloys where high material removal rate matters more than finish quality. The coarse pitch flute geometry breaks chips into small segments, reducing the risk of chip re-cutting and spindle overload. It is a go-to tool for machinists running roughing programs before a finishing pass with a standard end mill. The right-hand cut and right-hand flute direction are compatible with conventional milling machine setups.

Key Features

• M42 cobalt construction for heat and wear resistance in tough alloys
• TiCN coating adds surface hardness and reduces friction at the cutting edge
• Coarse pitch, 3-flute design promotes aggressive chip evacuation
• Center-cutting geometry allows direct plunge entry into the workpiece
• 3/4-inch shank matches standard collets and end mill holders
• Right-hand cut and right-hand helix for conventional machine compatibility

Compatibility

Designed as a direct-fit roughing end mill for any milling machine or CNC machining center that accepts a 3/4-inch shank, including standard ER collet chucks, Weldon-style end mill holders, and hydraulic tool holders sized for 3/4-inch tooling.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Secure the shank to the full recommended engagement depth in the tool holder and verify runout before cutting. Confirm spindle direction is set to right-hand rotation before starting the cut. Never exceed the tool manufacturer's recommended speed and feed parameters for the work material.