Description
The SECO 17004773 is a solid carbide square end mill engineered for high-performance milling in hardened materials and steel. Part of the MZ645 series, it features a 0.25-inch diameter cutting edge with a 0.625-inch length of cut and a 45-degree helix angle. The six-flute, right-hand spiral configuration supports aggressive stock removal while maintaining surface finish quality. An AlTiN coating increases heat resistance and extends tool life in demanding cutting conditions. The straight 0.25-inch shank and 3-inch overall length make it compatible with standard collet and end mill holder setups. This tool is single-end and center-cutting, allowing plunge entry. It is used by machinists and tooling specialists in CNC milling operations.
The 17004773 is suited for milling hardened materials and steel workpieces in production and job shop environments. The AlTiN finish and micrograin carbide substrate are selected for high-heat, high-abrasion applications where tool life is a primary concern. The six-flute geometry reduces chip load per tooth, which supports higher feed rates in short-chipping materials. This end mill is appropriate for finishing and semi-finishing passes on ferrous materials where tight tolerances and consistent surface quality are required.
Key Features
- Six-flute spiral design supports higher feed rates and improved surface finish in steel and hardened materials
- AlTiN coating provides heat and oxidation resistance for extended tool life in dry or minimal-lubricant cutting
- 45-degree helix angle balances cutting force and chip evacuation across a range of steel grades
- Center-cutting geometry allows direct plunge entry without pre-drilling
- Micrograin solid carbide substrate delivers rigidity and edge retention in high-hardness workpieces
- Right-hand cut and right-hand flute with straight shank for use in standard CNC milling tool holders
Compatibility
Designed for use with standard 0.25-inch collets and end mill holders in CNC machining centers. Primary workpiece materials are hardened materials and steel (material codes H and P). Part of the SECO MZ645 series.
Installation Notes
Installation is performed by qualified machinists or tooling technicians. Before mounting, confirm the spindle and tool holder are clean and free of debris that could affect runout. Secure the shank fully within the collet or holder to the recommended engagement depth per the tool holder manufacturer. Verify maximum TIR does not exceed 0.0005 inches before beginning a cut to protect both the tool and the workpiece.
Technical Specifications
- Mill Diameter: 0.25 inches
- Length of Cut: 0.625 inches
- Overall Length: 3 inches
- Shank Diameter: 0.25 inches
- Number of Flutes: 6
- Helix Angle: 45 degrees
- End Mill Material: Solid Carbide (Micrograin)
- Coating/Finish: AlTiN
- Flute Type: Spiral
- Shank Type: Straight
- Cutting Direction: Right Hand
- Flute Direction: Right Hand
- Single or Double End: Single
- Center-Cutting: Yes
- Coolant Through: No
- Extended Reach: No
- Variable Helix: No
- Chipbreaker: No
- Mill Diameter Tolerance: -0.0001 to -0.0003 inches
- Shank Diameter Tolerance: -0.0001 to -0.0003 inches
- Overall Length Tolerance: +0.0600 to -0.0600 inches
- Maximum TIR: 0.0005 inches
- Primary Workpiece Material: Hardened Materials, Steel
- Series: MZ645
- Weight: 0.08 pounds
Standard Information
- Brand: SECO
- Manufacturer Part Number: 17004773
