Osg 4501300 Square End Mill 0.75 in 4 Flute Cobalt

Product Description

The OSG 4501300 is a cobalt square end mill designed for general-purpose milling operations in ferrous and non-ferrous materials. It features a 0.75 inch cutting diameter, a 1.625 inch length of cut, and a 3.875 inch overall length, making it a standard regular-length tool suited to a wide range of milling applications. The four-flute geometry provides a balance between chip clearance and surface finish. The uncoated cobalt construction offers toughness and heat resistance without the brittleness associated with carbide, making it a practical choice for interrupted cuts, manual machines, and lower-speed setups.

This end mill is used in vertical milling machines, knee mills, and CNC machining centers for slotting, profiling, and peripheral milling operations. The right-hand cut and right-hand flute configuration is the standard orientation for conventional milling setups. The fine pitch and 30-degree helix angle suit it for general steel, alloy steel, stainless, and similar materials at moderate speeds and feeds. It is installed and operated by machinists and toolroom technicians in job shops, maintenance departments, and production environments.

Key Features

• 0.75 inch cutting diameter with 1.625 inch length of cut for standard-depth slotting and profiling
• Cobalt construction provides heat resistance and toughness for ferrous and difficult-to-machine materials
• Four-flute design balances chip evacuation with surface finish quality
• 30-degree helix angle with fine pitch for smooth cutting action on general materials
• Right-hand cut, right-hand flute — standard orientation for conventional and climb milling
• Uncoated finish suits regrinding and applications where coating adhesion or cost is a factor

Compatibility

Designed as a standard 0.75 inch shank square end mill compatible with ER collets, end mill holders, and side-lock holders accepting a 0.75 inch shank diameter. Fits vertical mills, knee mills, and CNC machining centers configured for that shank size.

Installation Notes

Installation is performed by a qualified machinist or toolroom technician. Confirm the spindle and holder are clean and free of chips before seating the shank, and torque the retention mechanism to the machine or holder specification. Inspect the cutting edges for chips or damage before use, as cobalt tooling can micro-chip if mishandled. Never exceed the recommended depth of cut for the diameter and material combination being machined.