Cleveland C43212 Square End Mill 3/8 Inch 4 Flute PM-4

Product Description

The CLEVELAND C43212 is a 4-flute square end mill in the PM-4 series, manufactured from M42 powdered metal high-speed steel. It carries a 0.375-inch cutting diameter, a 0.375-inch length of cut, and a 2.125-inch overall length on a 0.375-inch straight-cylindrical shank with a Weldon flat. The stub-length geometry keeps the tool rigid in the spindle, reducing deflection during aggressive passes. The 37-degree right-hand spiral flute and center-cutting design allow both peripheral and plunge cuts. Licensed machinists and CNC operators use this end mill for general milling in ferrous and non-ferrous materials where a durable, uncoated powdered metal tool is appropriate.

The C43212 is suited for milling operations in a wide range of workpiece material categories, including cast iron and hardened materials (H), non-ferrous metals (K), stainless and heat-resistant alloys (M), steel and steel alloys (P), and superalloys (S). Its stub length makes it a reliable choice for short-reach pocketing, slotting, and peripheral profiling on manual mills and CNC machining centers where rigidity is a priority over reach. It ships individually and is sold in single-unit quantities.

Key Features

• M42 powdered metal HSS construction for wear resistance in difficult materials
• 4 right-hand spiral flutes at a 37-degree helix angle for efficient chip evacuation
• Center-cutting design permits direct plunge entry without pre-drilling
• Stub-length profile minimizes deflection in short-reach applications
• Straight-cylindrical shank with Weldon flat for secure tool-holder retention
• Uncoated finish suitable for use with or without cutting fluid

Compatibility

Designed as a standard-shank replacement end mill for any tool holder accepting a 0.375-inch straight shank with Weldon flat, including ER collet chucks and side-lock holders commonly used in manual and CNC milling setups.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Power down and lock out the machine before changing tooling. Insert the shank to the recommended minimum engagement depth for your tool holder and torque the set screw against the Weldon flat per the tool-holder manufacturer specification. Inspect the cutting edges for chips or damage before each use, and confirm runout with a dial indicator after setup.