Osg 4510500 Square End Mill 1 in 5 Flute Cobalt

Product Description

The OSG 4510500 is a single-end square end mill designed for precision milling operations in ferrous and non-ferrous metals. Built from cobalt high-speed steel, it measures 1 inch in cutting diameter with a 2-inch length of cut and a 1-inch shank diameter, making it suitable for full-slot and peripheral milling passes. The 5-flute geometry paired with a 30-degree helix angle delivers a balance of chip evacuation and surface finish. At 4.5 inches overall length, this tool fits standard vertical milling machines and CNC machining centers. It is uncoated and ships ready for immediate use or resharpening to shop preference. Machinists, tool-and-die technicians, and CNC operators are the primary users.

This end mill is suited for general-purpose milling in shop and production environments. The fine-pitch flute spacing and right-hand cut with right-hand flute configuration make it appropriate for conventional and climb milling on steel, alloy steel, stainless, and similar materials. The centercutting design allows direct plunge entry without a pre-drilled pilot hole, expanding its utility in die work, pocket milling, and contour operations. The stub-length classification keeps deflection low during aggressive radial cuts.

Key Features

• Cobalt high-speed steel construction for heat and wear resistance in ferrous materials
• 5-flute fine-pitch geometry for improved surface finish and feed rate capability
• 30-degree helix angle balances cutting force and chip flow
• Centercutting design allows direct plunge milling without a pilot hole
• Right-hand cut and right-hand flute — standard configuration for conventional machining setups
• Uncoated finish suitable for resharpening and recoating to shop specification

Compatibility

Designed as an OEM-style general-purpose end mill for use in vertical milling machines and CNC machining centers accepting a 1-inch straight shank or ER collet system.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the spindle is fully stopped and the machine is in an e-stop or lockout-tagout state before loading or changing tooling. Seat the shank fully in the collet or end-mill holder and torque the drawbar or collet nut to the machine manufacturer specification. Verify runout with a dial indicator before initiating a cut.