Seco 74018150 Milling Insert SPMX0903AP-75 Hx Carbide

Product Description

The SECO 74018150 is a solid carbide milling insert carrying manufacturer part number SPMX0903AP-75, designed for use in indexable milling cutters in metalworking and machining operations. This single-sided, square-shaped insert features four cutting edges with a neutral rake angle, a T-Land cutting edge style, and an 11-degree relief angle. The uncoated, bright finish fine-grain carbide substrate in grade HX is suited for applications where coating is not required or where sharp edge integrity is the priority. The insert measures 3/8 inches in both length and width, with a thickness of 1/8 inches, and a maximum depth of cut of 0.3750 inches.

This insert is suited for milling cast iron, non-ferrous metals, superalloys, and titanium. It is used in production machining environments by machinists, tooling technicians, and CNC operators working with indexable face mills or shoulder mills. The SPMX-09 series insert fits toolholders within the R215.39, R215.49-3, and R417.19-3 cutter series. The chip breaker designation is 75. Typical applications include face milling, shoulder milling, and contour operations on these material groups.

Key Features

• Solid carbide fine-grain HX grade substrate with bright uncoated finish for sharp, consistent cutting edges
• Square insert shape with 90-degree included angle and four usable cutting edges per insert
• T-Land cutting edge style with neutral rake and 11-degree relief angle for stable chip formation
• Maximum depth of cut of 0.3750 inches; inscribed circle diameter of 0.3750 inches
• Screw-held, single-sided insert with neutral hand for flexible toolholder mounting
• ISO-coded SPMX0903AP-75 with compatibility across R215.39, R215.49-3, and R417.19-3 cutter series

Compatibility

Compatible with SECO cutter series R215.39, R215.49-3, and R417.19-3. Designed for machining cast iron, non-ferrous metals, superalloys, and titanium. ISO and ANSI code: SPMX0903AP-75.

Installation Notes

Installation is performed by machinists or tooling technicians during cutter setup or insert indexing. Power down and lock out the machine spindle before changing or indexing inserts. Use the correct torx or hex key specified by the cutter body manufacturer to torque the clamping screw — do not overtighten or substitute fasteners. Inspect the insert pocket and seating surface for debris or damage before seating the new insert.