Osg 5742800 Square End Mill 27/32 in 6 Flute Hss

Product Description

The OSG 5742800 is a 6-flute square end mill designed for milling operations requiring a center-cutting, right-hand spiral tool in vanadium high speed steel. The cutter measures 27/32 inches (0.8438 inches) in diameter with a 1-7/8 inch length of cut and a 5/8 inch shank diameter. The 30-degree helix angle and spiral flute geometry promote efficient chip evacuation and stable cutting action. This is a single-end, uncoated tool suited for machinists and tool-and-die professionals working with a variety of ferrous and non-ferrous materials.

This end mill is intended for use in vertical milling machines, CNC machining centers, and manual knee mills where a regular-length, small-to-mid-diameter cutter is required. The center-cutting design allows for plunge entry without a pre-drilled hole. The 3% vanadium high speed steel construction provides good wear resistance and toughness at moderate cutting speeds, making it appropriate for general-purpose shop work across job shops and production environments.

Key Features

• 27/32 inch (0.8438 inches) cutting diameter with a 1-7/8 inch length of cut
• 6 flutes for improved surface finish and feed-rate capability compared to 4-flute tools
• 30-degree helix angle with spiral flute geometry for efficient chip removal
• Center-cutting design allows direct plunge milling without pilot drilling
• Right-hand cut and right-hand flute configuration for standard spindle rotation
• 3% vanadium high speed steel (Series 574) for improved edge retention over standard M2 HSS

Compatibility

Designed as a general-purpose replacement or production end mill for standard 5/8 inch collets, ER collet chucks, and end mill holders used in vertical mills and CNC machining centers.

Installation Notes

Install in a clean, properly sized collet or end mill holder and torque to the holder manufacturer's specification to prevent pullout under load. Ensure the spindle and work holding are fully powered down and locked before changing tooling. Right-hand cut tools require standard forward spindle rotation — confirm spindle direction before engaging the cut. Uncoated HSS end mills should be used with appropriate cutting fluid or coolant to manage heat at the cutting edge.