Cleveland C40009 Corner Radius End Mill 1 in 3 Flute PM-538R

Product Description

The CLEVELAND C40009 is a corner radius end mill engineered for precision milling operations where a radiused corner profile is required at the cutting edge. With a 1 inch cutting diameter and a 2 inch length of cut, this tool handles moderate-depth slotting, profiling, and peripheral milling passes. The 3-flute geometry balances material removal rate with chip evacuation, making it a practical choice for both ferrous and non-ferrous work. A 42-degree helix angle promotes smooth cutting action and reduces chatter. The bright uncoated finish keeps the tool ready to run as-shipped without additional prep. Machinists and tool-and-die professionals working in job shops and production environments are the primary users of this tool.

This end mill suits general-purpose milling on vertical and horizontal machining centers as well as manual knee mills. The center-cutting design allows plunge entry into the workpiece, adding versatility for applications that require ramping or helical interpolation. The coarse pitch classification supports higher feed rates in materials where chip packing is a concern. The 1 inch shank diameter matches standard ER and side-lock tool holders commonly found in production shops. The PM-538R series designation identifies it within the Cleveland high-performance end mill family.

Key Features

• Corner radius geometry reduces stress concentration at the cutting edge and extends tool life versus sharp-corner end mills
• 3-flute configuration balances chip clearance with rigidity for slotting and profiling cuts
• 42-degree helix angle promotes smooth cutting action and minimizes chatter
• Center-cutting design permits direct plunge entry and helical interpolation
• Bright uncoated finish suitable for use as-shipped; compatible with most cutting fluids and oils
• Right-hand cut and right-hand flute direction for standard spindle operation

Compatibility

Designed as an OEM-style replacement or direct-application end mill for machining centers and manual mills accepting a 1 inch shank diameter. No specific machine model compatibility data was provided in the product input.

Installation Notes

Installation should be performed by a qualified machinist following shop tooling procedures. Secure the 1 inch shank fully into a matched tool holder and tighten to holder manufacturer torque specifications before operation. Confirm spindle direction is set to right-hand rotation before engaging the cut. Inspect the corner radius and cutting edges for chips or damage before each use, and replace the tool if edge integrity is compromised.