Hertel E299921150 Square End Mill 17/64 in 2 Flute Hss

Product Description

The HERTEL E299921150 is a single-end square end mill designed for precision milling operations in metal and alloy workpieces. Manufactured from M42 high speed steel with a bright/uncoated finish, it features a 17/64 inch (0.2656 inch) cutting diameter, a 9/16 inch (0.5625 inch) length of cut, and a 30-degree helix angle. The two-flute spiral configuration and right-hand cutting direction make this tool well suited for slotting, profiling, and peripheral milling. It is centercutting, allowing plunge entry into the workpiece. Machinists and toolroom professionals install and operate this end mill in CNC machining centers, knee mills, and manual milling machines.

This end mill is appropriate for general-purpose milling tasks in job shops, maintenance machining environments, and production toolrooms. The 3/8 inch shank diameter fits standard ER and straight-bore collet systems common to vertical milling setups. The bright/uncoated finish suits applications where cutting fluid or coolant is used to manage heat, particularly when machining ferrous and non-ferrous metals at moderate cutting speeds. Its compact overall length of 2-1/2 inches keeps deflection low in confined setups.

Key Features

• M42 high speed steel construction provides toughness and wear resistance in demanding milling applications
• Centercutting design allows direct plunge cuts without pre-drilling
• 30-degree helix angle promotes smooth chip evacuation and reduced cutting forces
• Right-hand cut and right-hand flute spiral for use in standard milling machine spindles
• Bright/uncoated finish compatible with coolant-assisted machining of a wide range of metals
• Two-flute design maximizes chip clearance in slotting and pocket milling operations

Compatibility

Designed as a standard single-end square end mill with a 3/8 inch shank, suitable for use in collet chucks and end mill holders sized for 3/8 inch straight shanks on vertical and CNC milling machines.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer's setup procedures. Ensure the milling machine spindle is fully powered down and locked out before changing tooling. Seat the shank fully into the collet or end mill holder and torque the retention hardware to the holder manufacturer's specification. Verify runout with an indicator before beginning the cut, and confirm that cutting speed and feed rate are appropriate for the workpiece material and tool diameter.