Hertel E199921253 Square End Mill 3/16 in 4 Flute Hss

Product Description

The HERTEL E199921253 is a 4-flute square end mill designed for general-purpose milling operations in machine shops and production environments. Built from high speed steel (HSS), it features a 3/16 inch cutting diameter, a 1-3/4 inch length of cut, and a 30-degree helix angle with right-hand cutting and right-hand flute direction. The spiral flute geometry promotes chip evacuation during slotting, profiling, and peripheral milling. This tool is intended for use by machinists and tooling technicians operating manual mills, CNC machining centers, and knee mills.

This end mill is suited for light to medium material removal in applications where HSS tooling is preferred, such as lower-speed setups, non-production runs, or work on softer metals and plastics. The 3/8 inch shank diameter accommodates standard collets and end mill holders commonly found in shop environments. At 3-9/16 inches overall length, it provides adequate reach for most standard milling setups without excessive overhang. The bright, uncoated finish makes it straightforward to inspect for wear after use.

Key Features

• 3/16 inch cutting diameter with 1-3/4 inch length of cut for controlled material engagement
• 4 flutes with 30-degree helix angle for balanced chip load and surface finish
• High speed steel construction suited for lower-speed milling and softer workpiece materials
• Right-hand cut and right-hand spiral flute direction — standard orientation for most milling setups
• Bright/uncoated finish allows easy visual wear inspection
• Not center-cutting — requires a pre-drilled hole or ramping entry for plunge operations

Compatibility

Designed for use with standard 3/8 inch collets, end mill holders, or shrink-fit holders compatible with 3/8 inch shank tooling across manual and CNC milling machines.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and the machine is in a safe, locked-out state before changing tooling. Seat the shank fully and evenly in the holder to the recommended gauge length before tightening. Because this end mill is not center-cutting, avoid direct plunge entry into solid material — use a pre-drilled entry point or a programmed ramp or helical entry path.