Seco 02426793 Milling Insert SEEX1204AFN-E08 H25 Carbide

Product Description

The SECO 02426793 is a solid carbide milling insert in the SEEX-12 series, sold under the ANSI/ISO designation SEEX1204AFN-E08. This single-sided, square-profile insert carries a micrograin carbide substrate in manufacturer grade H25 with a bright, uncoated finish. It provides four cutting edges with a positive rake angle of 25 degrees, a 20-degree relief angle, and a honed cutting edge style. The E08 chip breaker geometry is engineered for controlled chip evacuation at the cutting zone. Thickness runs 0.1874 inches nominal, inscribed circle diameter is 0.5 inches, and the screw-mount hole is 0.1772 inches in diameter. Installation is neutral-hand, making it compatible in both right- and left-hand toolholder orientations.

This insert is intended for milling applications on non-ferrous metals as its primary workpiece material, with superalloys and titanium as the secondary workpiece material category. The positive rake and uncoated micrograin substrate minimize built-up edge on gummy or abrasive non-ferrous alloys and reduce heat generation when cutting titanium-group materials. Confirmed compatible cutter series are R217.53-12 and R220.53-12. The maximum depth of cut reaches 0.3425 inches, and the effective cutting edge length is 0.5 inches. Package quantity is 1 insert; minimum order quantity is 10 inserts.

Key Features

• Solid carbide micrograin substrate in grade H25 for wear resistance on non-ferrous and superalloy materials
• Bright, uncoated finish eliminates coating adhesion issues when machining aluminum and other non-ferrous alloys
• Four usable cutting edges per insert from a 90-degree included-angle square geometry
• Positive 25-degree rake angle and 20-degree relief angle reduce cutting forces and minimize workpiece heat input
• E08 chip breaker geometry promotes chip control across a range of feed and depth conditions
• Screw-mount insert holding method for positive seating and repeatable edge indexing

Compatibility

Designed for use in SECO cutter series R217.53-12 and R220.53-12. ANSI and ISO designation is SEEX1204AFN-E08, insert size code 1204.

Installation Notes

Indexing and insert replacement should be performed by a qualified machinist or toolroom technician with the machine spindle locked out and at rest. Use the correct Torx or hex key driver specified by the cutter body manufacturer when seating the clamping screw to avoid cross-threading the insert pocket. Inspect the insert pocket and clamping screw for chips or damage before seating a new insert. Ensure the insert seats fully and flush against all pocket walls before resuming cutting operations.