Hertel 91192153 Roughing End Mill 1/2 in 3 Flute Cobalt

Product Description

The HERTEL 91192153 is a single-end roughing end mill designed for aggressive material removal in milling operations. Constructed from M42 cobalt high-speed steel with a bright, uncoated finish, it delivers heat resistance and toughness suited to interrupted cuts and tough ferrous materials. The 1/2 inch diameter cutter features 3 flutes with a coarse pitch geometry, producing a chip-breaking action that reduces cutting forces and prevents chip packing during heavy roughing passes. With a 1.25 inch length of cut and a 3.25 inch overall length, this tool fits standard milling setups without extended reach.

This end mill is used in manual and CNC milling applications where rapid stock removal is the priority before a finishing pass. It is well suited to job shops, maintenance machining, and production environments working with steel, cast iron, and similar materials. The center-cutting design allows plunge entry, giving machinists flexibility in toolpath programming. Right-hand cutting and right-hand flute direction are consistent with standard spindle configurations on vertical and horizontal mills.

Key Features

• M42 cobalt construction for elevated heat resistance and edge retention in tough ferrous materials
• Coarse pitch roughing geometry breaks chips and reduces cutting forces during heavy passes
• Center-cutting capability allows direct plunge entry without a pre-drilled hole
• 1/2 inch shank diameter matches 1/2 inch collets, end mill holders, and Weldon-style holders
• Bright uncoated finish suitable for use with or without cutting fluid
• Right-hand cut and right-hand flute direction for standard milling spindle compatibility

Compatibility

Designed as a direct-fit roughing end mill for standard 1/2 inch end mill holders, collet chucks, and Weldon-style tool holders used in vertical and horizontal milling machines.

Installation Notes

Installation is performed by a machinist or tooling technician following standard tool change procedures. Ensure the machine spindle is fully stopped and locked out before changing tooling. Seat the shank fully into the holder and secure to the manufacturer torque specification for the holder type in use. Verify runout with a dial indicator before beginning a cut, particularly on roughing operations where side loads are high.