Eagle Cutting Tool TDD50-4056S-ALT-D 7/8 End Mill 4FL Altin

Product Description

The EAGLE CUTTING TOOL TDD50-4056S-ALT-D is a 7/8 inch diameter square end mill engineered for demanding metal removal applications. Built from solid carbide with a 4-flute geometry and a 7/8 inch shank, this single-end tool features an AlTiN (aluminum titanium nitride) coating that extends tool life by resisting heat buildup at high cutting speeds. The center-cutting design allows for plunge milling operations in addition to standard peripheral cuts. Manufactured in the USA, this end mill is suited for machinists, toolmakers, and CNC operators working with ferrous and high-hardness materials.

This end mill is intended for use in vertical and horizontal milling machines, machining centers, and CNC mills where 7/8 inch toolholding is available. The AlTiN coating makes it well-suited for dry or minimal-lubrication cutting in hardened steels, stainless steel, cast iron, and similar difficult-to-machine alloys. The square end profile produces sharp 90-degree shoulder cuts, slots, and pockets. It is a practical choice for production shops and toolrooms requiring a reliable domestic-made carbide end mill in this shank and diameter combination.

Key Features

• 7/8 inch cutting diameter with matching 7/8 inch shank for direct toolholder fit
• 4-flute geometry balances chip clearance and surface finish quality
• AlTiN coating improves heat resistance and extends tool life in hard-metal cuts
• Center-cutting design enables plunge entry without a pre-drilled hole
• Single-end configuration with square end profile for shoulder milling and slotting
• USA manufactured solid carbide construction

Compatibility

Designed as an OEM-style replacement or direct-fit tooling option for milling machines and machining centers that accept 7/8 inch straight-shank end mills in standard ER, Weldon, or comparable toolholders.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator following standard toolholding procedures. Secure the shank fully within the toolholder to the recommended engagement depth and torque the setscrew or collet nut according to the toolholder manufacturer specifications before running the spindle. Inspect the cutting edges for chips or coating damage before each use. Do not exceed the rated speed and feed parameters for the workpiece material and machine horsepower.

Technical Specifications

• Cutting Diameter: 7/8 inch
• Shank Diameter: 7/8 inch
• Number of Flutes: 4
• End Type: Single End, Square End
• Coating: AlTiN (Aluminum Titanium Nitride)
• Construction: Solid Carbide
• Center Cutting: Yes
• Country of Origin: USA
• Weight: 1.42 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: TDD50-4056S-ALT-D