Hertel 41120809 Roughing End Mill 1 in 5 Flute Cobalt

Product Description

The HERTEL 41120809 is a single-end roughing end mill designed for aggressive material removal in milling operations. Built from M42 cobalt high-speed steel with a bright uncoated finish, this tool delivers the heat and wear resistance needed for cutting ferrous and tough alloy materials. It features a 1 inch cutting diameter, a coarse pitch design across 5 flutes, and a 1 inch length of cut. The 3.5 inch overall length and 1 inch shank diameter make it a standard fit for a wide range of vertical and horizontal milling setups. It is centercutting and runs right-hand cutting and flute direction.

This roughing end mill is suited for production and job-shop machining environments where fast stock removal is the priority. The coarse pitch flute geometry breaks chips aggressively, reducing heat buildup and cutting forces compared to standard end mills. It is commonly used in manual knee mills, CNC machining centers, and horizontal mills working with steel, stainless, and high-temp alloys. Machinists and tooling specialists select this style when roughing passes need to be completed quickly before a finishing tool takes final dimension.

Key Features

• M42 cobalt HSS construction for elevated heat and wear resistance
• 5-flute coarse pitch design for aggressive chip breaking and fast stock removal
• Centercutting geometry allows direct plunge entry into workpiece
• Right-hand cut and right-hand flute direction for standard spindle setups
• Bright uncoated finish suitable for use with or without cutting fluid
• Regular length profile fits standard toolholders without extended reach concerns

Compatibility

Designed as an OEM-style roughing end mill for use in standard 1 inch straight-shank toolholders on vertical mills, CNC machining centers, and horizontal milling machines.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully powered down and locked out before inserting or removing the end mill from the toolholder. Verify that the shank is fully seated and the set screw or collet is torqued to the toolholder manufacturer's specification. Inspect the cutting edges for chips or damage before each use, and confirm proper workholding before beginning a roughing pass.