Description
The SECO 03083824 is a 4-flute solid carbide ball end mill designed for precision milling in demanding materials including stainless steel, high-temperature alloys, and hardened materials. It features a 1/8 inch cutting diameter with a 1/4 inch length of cut and a 1-1/2 inch overall length. The micrograin carbide substrate is coated with AlTiN via a PVD process, providing thermal resistance and wear protection at elevated cutting temperatures. A variable helix geometry at 40 degrees reduces harmonic vibration and improves surface finish consistency. This tool is center-cutting and single-end, suited for slotting, profiling, and finish passes in high-performance CNC machining applications.
This end mill is intended for CNC machining centers and high-speed machining operations where tool rigidity and coating performance are critical. It is well suited for shops and field machinists working with aerospace alloys, medical-grade stainless, and hardened die steels. The short length type and straight-cylindrical shank make it a practical choice for tight-clearance work and benchtop CNC setups requiring consistent tolerances in the 1/8 inch diameter range. It is part of the SECO STB440.2 series, catalog number STB440.2-0.125-D2-B.0-Z4.
Key Features
- Micrograin solid carbide substrate for rigidity and edge retention in hard and abrasive materials
- AlTiN PVD coating provides oxidation resistance and extended tool life in stainless steel and high-temp alloys
- Variable helix at 40 degrees reduces chatter and improves surface finish on difficult-to-machine workpieces
- Center-cutting design allows plunge entry without a pre-drilled pilot hole
- Right-hand cutting and right-hand flute direction for standard CNC spindle compatibility
- Spiral flute geometry supports both roughing and finishing material removal in a single tool
Compatibility
Designed for use in CNC machining centers and milling machines accepting a 1/8 inch straight-cylindrical shank. Primary workpiece materials are stainless steel (M), high-temperature alloys (S), and hardened materials (H) per ISO material group classification.
Installation Notes
Installation should be performed by a qualified machinist following shop safety procedures. Ensure the spindle is fully stopped and locked before inserting or removing the tool from the collet or tool holder. Use a properly sized collet or end mill holder to achieve the shank diameter tolerance range of -0.0001 to -0.0004 inches for secure seating. Verify TIR does not exceed 0.0005 inches after tool installation to maintain dimensional accuracy and prevent premature edge failure.
Technical Specifications
- Mill Diameter: 1/8 inch (0.1250 inches)
- Length of Cut: 1/4 inch (0.2500 inches)
- Overall Length: 1-1/2 inches (1.5000 inches)
- Shank Diameter: 1/8 inch (0.1250 inches)
- Nose Radius: 0.0625 inches
- Reach Length: 0.2500 inches
- Number of Flutes: 4
- Helix Angle: 40 degrees
- Flute Type: Spiral
- Helix Style: Variable
- End Mill Material: Solid Carbide, Micrograin
- Coating: AlTiN (PVD)
- Shank Type: Straight-Cylindrical
- Cutting Direction: Right Hand
- Single or Double End: Single
- Center Cutting: Yes
- Coolant Through: No
- Extended Reach: No
- Chipbreaker: No
- Variable Index: No
- Length Type: Short
- Material Removal Type: Roughing and Finishing
- Primary Workpiece Materials: Stainless Steel, High-Temp Alloy, Hardened Materials
- Mill Diameter Tolerance: +0.0000 / -0.0020 inches
- Overall Length Tolerance: +0.0600 / -0.0600 inches
- Shank Diameter Tolerance: -0.0001 / -0.0004 inches
- TIR Maximum: 0.0005 inches
- Series: STB440.2
- Manufacturers Catalog Number: STB440.2-0.125-D2-B.0-Z4
- System of Measurement: Fractional Inch
- Weight: 0.02 pounds
- Package Dimensions: 2.59 x 0.5 x 0.5 inches
- Package Quantity: 1
Standard Information
- Brand: SECO
- Manufacturer Part Number: 03083824
