Value Collection -20550-8 Square End Mill 1/2 in 4 Flute Hss

Product Description

The VALUE COLLECTION -20550-8 is a single-end square end mill designed for general-purpose milling operations in metal, wood, and composite materials. Built from high speed steel (HSS) with a titanium nitride (TiN) coating, it delivers improved surface hardness and wear resistance compared to uncoated HSS tooling. The 1/2-inch mill diameter pairs with a 1-1/4-inch length of cut (LOC) and a 3-1/4-inch overall length (OAL), making it a standard regular-length geometry. Four spiral flutes with a 30-degree right-hand helix promote efficient chip evacuation and smooth cutting action. This end mill is center-cutting, allowing plunge cuts in addition to peripheral and slot milling.

This end mill is suited for use in manual milling machines and CNC machining centers in job shop, toolroom, and maintenance environments. The 1/2-inch shank diameter fits standard R8, ER, and other common collet systems. Right-hand cutting direction makes it compatible with conventional milling setups. The regular length classification and fixed helix design make it a straightforward choice for face milling, slotting, profiling, and contouring operations where extended reach or variable geometry is not required.

Key Features

• TiN coating increases surface hardness and extends tool life compared to bare HSS
• Center-cutting design allows direct plunge entry into workpiece material
• 4-flute spiral geometry supports smooth finishing cuts and efficient chip flow
• 30-degree right-hand helix angle balances cutting forces across flute engagement
• 1/2-inch shank diameter fits widely available collet and holder systems
• Regular length profile suits the majority of standard milling applications

Compatibility

Designed as a standard 1/2-inch shank square end mill for use in manual mills and CNC machining centers accepting 1/2-inch collets or end mill holders.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Always power down and lock out the spindle before changing tooling. Seat the shank fully into the collet or holder to the recommended minimum engagement depth and torque the retention fastener per the toolholder manufacturer specifications. Inspect the cutting edges and TiN coating for chips or wear before each use; damaged tooling should be replaced before running.