Hertel 44838944 Roughing End Mill 0.75 in 4 Flute Ticn Cobalt

Product Description

The HERTEL 44838944 is a single-end cobalt roughing end mill designed for aggressive material removal in milling operations. Built from M42 cobalt high-speed steel with a titanium carbonitride (TiCN) coating, it delivers extended tool life in hard and abrasive workpiece materials. The coarse pitch flute geometry rapidly evacuates chips, reducing heat buildup and cutting forces during heavy roughing passes. With a 0.75 inch mill diameter and a 1.25 inch length of cut, this 4-flute end mill suits a broad range of roughing applications on manual and CNC milling machines. It is installed and operated by machinists and tool-and-die professionals working in production and job-shop environments.

This end mill is suited for roughing operations on ferrous and non-ferrous metals where stock removal rate is the priority over surface finish. The right-hand cutting and right-hand flute direction make it compatible with standard spindle configurations. The 0.75 inch shank diameter fits directly into standard R8, CAT, BT, and collet-style toolholders without an adapter. It is not center-cutting, so it should be used for peripheral milling and slotting where a pre-existing feature or plunge entry is already established.

Key Features

• M42 cobalt HSS construction for improved hardness and heat resistance compared to standard M2 HSS
• TiCN coating extends tool life and reduces friction on the cutting edge
• Coarse pitch geometry promotes fast chip evacuation during heavy roughing cuts
• 4-flute, single-end configuration with right-hand cut and right-hand helix
• Non-center-cutting design — requires peripheral entry or pre-drilled start hole
• Shank diameter tolerance of -0.0001 to -0.0005 inches ensures consistent toolholder fit

Compatibility

Designed as an OEM-style replacement or direct-fit roughing end mill for use in standard 0.75 inch collet chucks, end mill holders, and side-lock holders on manual knee mills and CNC machining centers.

Installation Notes

Installation is performed by a qualified machinist or toolroom technician. Power down and lock out the spindle drive before changing tooling. Seat the shank fully into the toolholder and torque the retention hardware to the toolholder manufacturer's specification. Verify runout with a dial indicator before beginning a cut, as excessive runout accelerates wear on coarse-pitch roughing geometry.