Description

The SECO 17002318 is a solid carbide corner chamfer end mill engineered for demanding material removal in steel, stainless steel, cast iron, superalloys, and titanium. It carries a 0.25-inch mill diameter, a 1.25-inch length of cut, and a 3-inch overall length with a straight cylindrical 0.25-inch shank. The AlTiN PVD coating delivers heat resistance and extended tool life in high-temperature cutting environments. A 45-degree chamfer angle with a 0.003-inch chamfer width produces clean, controlled edge breaks in one pass. The micrograin carbide substrate and super-close pitch seven-flute geometry support both roughing and finishing operations in a single tool.

This end mill belongs to the SECO S738 series and is built for shouldering, slotting, ramp-down, helical interpolation, drill mill applications, and plunging and recessing operations. The variable index flute design reduces harmonic chatter during aggressive cuts, making it suitable for high-efficiency milling cycles on CNC machining centers in job shop and production environments. It is a single-end, right-hand cutting tool with right-hand flute direction. Primary workpiece materials include P, M, K, and S grade materials per ISO classification.

Key Features

Solid micrograin carbide construction for rigidity and wear resistance in hard and abrasive workpiece materials
AlTiN PVD coating extends tool life in high-temperature ferrous and superalloy cutting
Seven-flute super-close pitch configuration supports high feed rates and fine surface finish in finishing passes
Variable index flute spacing reduces chatter and vibration during roughing operations
45-degree chamfer angle with 0.003-inch chamfer width for precise, consistent edge chamfering
Extra-long length of cut at 1.25 inches enables deep shoulder and slot milling without tool change

Compatibility

The SECO 17002318 is compatible with primary workpiece materials classified as steel, stainless steel, cast iron, superalloys, and titanium (ISO material grades P, M, K, and S). It is designed for use in standard CNC machining centers and milling machines accepting a 0.25-inch straight cylindrical shank with a maximum TIR of 0.0005 inches.

Installation Notes

Installation and tool changes should be performed by a qualified machinist or CNC operator with the machine in a full stop and locked-out state per applicable safety procedures. Use a precision collet or end mill holder rated for the 0.25-inch shank diameter to maintain runout within the specified 0.0005-inch TIR maximum. Verify correct spindle direction (right-hand) and programmed feed and speed parameters before engaging the cut. This tool is not center-cutting and is not rated for coolant-through applications; direct external coolant or air blast to the cutting zone as appropriate.

Technical Specifications

Mill Diameter: 0.25 inches
Length of Cut: 1.25 inches
Overall Length: 3 inches
Shank Diameter: 0.25 inches
Number of Flutes: 7
Chamfer Width: 0.003 inches
Chamfer Angle: 45 degrees
Helix Style: Medium
Flute Type: Variable Index
Pitch: Super Close
End Mill Material: Solid Carbide (Micrograin)
Coating: AlTiN (PVD)
Cutting Direction: Right Hand
Flute Direction: Right Hand
Shank Type: Straight Cylindrical
Mill Diameter Tolerance: +0.0000 to -0.0020 inches
TIR Maximum: 0.0005 inches
Centercutting: No
Coolant Through: No
Material Removal Type: Roughing and Finishing
Primary Workpiece Material: Steel, Stainless Steel, Cast Iron, Superalloys and Titanium
Series: S738
Package Weight: 0.08 pounds