Cleveland C52159 Square End Mill 3/8 in 2 Flute Cobalt

Product Description

The CLEVELAND C52159 is a cobalt square end mill designed for metal removal in demanding machining applications. Built from M42 cobalt high-speed steel, this double-end mill features a 3/8-inch cutting diameter, a 9/16-inch length of cut, and a 3-1/2-inch overall length. The spiral flute geometry and 30-degree helix angle promote efficient chip evacuation and smooth cutting action. With centercutting capability, the C52159 can plunge directly into the workpiece, expanding its versatility on the milling machine or machining center. This tool is uncoated and intended for right-hand cut and right-hand flute orientation.

This end mill is suited for milling high-temperature alloys, stainless steel, and general steel stock in job shop, maintenance, and production environments. The HDC-2 series designation indicates a heavy-duty cobalt construction appropriate for tougher workpiece materials where standard HSS tooling wears prematurely. The straight cylindrical shank with Weldon flat accommodates standard end mill holders and set-screw tool holders with a 3/8-inch bore. It is a regular-length tool appropriate for general-purpose side milling, slotting, and plunge operations.

Key Features

• M42 cobalt construction for extended tool life in hard-to-machine materials
• Double-end design provides two usable cutting ends, extending service life
• Centercutting geometry allows direct plunge entry without a pilot hole
• 30-degree helix angle promotes efficient chip flow and reduced cutting forces
• Straight shank with Weldon flat for secure clamping in set-screw holders
• Right-hand cut and right-hand flute orientation for standard milling setups

Compatibility

Designed as an OEM-style replacement or direct tooling selection for standard 3/8-inch end mill holders and Weldon-style tool holders used in vertical milling machines and machining centers.

Installation Notes

Installation is performed by qualified machinists or tooling technicians. Secure the Weldon flat shank fully into a matching 3/8-inch tool holder and tighten the set screw against the flat to prevent tool pull-out under load. Verify spindle direction is set to right-hand rotation before engaging the cut. Inspect both cutting ends for damage before use and follow shop-standard feeds and speeds for cobalt tooling in the selected workpiece material.