Osg 20557502 Corner Radius End Mill 3/4 in 5 Flute Solid Carbide

Product Description

The OSG 20557502 is a solid carbide corner radius end mill designed for high-performance material removal in demanding machining applications. It features a 3/4 inch diameter, a 1-1/2 inch length of cut, a 0.06 inch corner radius, and five flutes with a variable helix angle. The cutting geometry is optimized for both roughing and finishing passes in a single tool. The EXO TiAlN PVD coating provides thermal resistance and wear protection at elevated cutting temperatures. A Weldon flat shank ensures positive drive in the toolholder. This tool is intended for use by machinists and CNC operators working with difficult-to-machine alloys.

The 20557502 is engineered for primary use in stainless steel, superalloys, and hard materials. It suits vertical and horizontal machining centers running high-pressure or dry cutting strategies where heat generation and tool wear are primary concerns. The 4 inch overall length and regular length classification make it appropriate for standard-reach milling operations on aerospace, medical, and energy components. The variable helix and variable index design help suppress chatter during long cuts in tough alloys.

Key Features

• 5-flute variable helix geometry reduces chatter and improves surface finish in hard materials
• 0.06 inch corner radius extends tool life and strengthens the cutting edge against chipping
• EXO TiAlN PVD coating delivers oxidation resistance and hardness at high cutting temperatures
• Weldon flat shank provides positive engagement and prevents slippage in the toolholder
• Center-cutting capable for plunge entry without a pre-drilled hole
• Right-hand cut and right-hand flute direction compatible with standard CNC spindle setups
• Ultra fine micrograin solid carbide substrate maintains edge integrity in superalloys and titanium

Compatibility

Designed for use with standard Weldon flat toolholders. Primary workpiece materials are stainless steel, superalloys, and hard materials per OSG Series 2055 application guidelines.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Secure the Weldon flat shank fully into the toolholder to the correct seating depth before torquing the set screw. Verify spindle runout and toolholder condition before use, as excessive runout will accelerate edge wear on carbide end mills. Confirm that cutting parameters, coolant strategy, and workholding meet the requirements of the workpiece material before beginning the operation.