Osg 402-2188 Square End Mill 7/32 in 2 Flute Solid Carbide

Product Description

The OSG 402-2188 is a solid carbide square end mill designed for precise milling operations in metal, composite, and engineering plastic workpieces. It features a 7/32-inch (0.2188-inch) cutting diameter, a 5/8-inch length of cut, and a 1/4-inch shank diameter for use in standard collet chucks and end mill holders. The 30-degree helix angle promotes smooth chip evacuation and reduces cutting forces. Machined from micrograin carbide, this tool delivers consistent edge integrity across high-cycle applications. It is installed and operated by machinists, tool-and-die technicians, and CNC operators in job shop and production environments.

The 402-2188 is suited for slot milling, profiling, and peripheral milling in small-diameter applications. The centercutting geometry allows plunge entry, expanding the range of operations without a pre-drilled pilot hole. The 2-flute configuration provides chip clearance for softer metals and non-ferrous materials where flute evacuation is critical. With a 2-1/2-inch overall length and regular-length designation, this end mill fits compact workholding setups and shorter-reach machining programs on vertical mills and CNC machining centers.

Key Features

• Solid micrograin carbide construction for consistent edge retention
• 7/32-inch cutting diameter (0.2188 inches) with 5/8-inch length of cut
• 30-degree right-hand spiral flute for efficient chip evacuation
• Centercutting design allows direct plunge entry
• 2-flute geometry maximizes chip clearance in non-ferrous and softer materials
• Right-hand cut with uncoated finish, Series 402

Compatibility

Designed as an OEM-style replacement and standard tooling option for 1/4-inch shank collet chucks and end mill holders used in vertical milling machines and CNC machining centers.

Installation Notes

Installation is performed by machinists or CNC operators. Ensure the machine spindle is fully stopped and locked out before changing tooling. Secure the 1/4-inch shank in a properly sized collet or end mill holder and torque the retention nut according to the toolholder manufacturer specifications. Verify runout with a dial indicator before beginning a production run to protect edge life.