Seco 74016343 Milling Insert SEKR1203AFN-E07 Hx Carbide

Product Description

The SECO 74016343 is a solid carbide milling insert carrying the ANSI/ISO designation SEKR1203AFN-E07. It is an uncoated, fine-grain carbide insert in a square shape with a neutral hand orientation, designed for use in indexable milling cutters. The insert features a positive rake angle of 18 degrees, a 20-degree relief angle, and a honed cutting edge style. With four usable cutting edges and a corner radius of 0.0394 inches, it delivers consistent performance in finish and semi-finish milling operations. The E07 chip breaker geometry and bright uncoated surface suit applications where coating-induced edge buildup is a concern.

This insert is intended for milling non-ferrous metals as its primary workpiece material, with secondary suitability for cast iron, superalloys, and titanium. It fits the SECO R220.13-12 cutter series and is compatible with wedge-clamp insert holding systems. Typical applications include face milling, shoulder milling, and profile milling operations performed by machining professionals in manufacturing, aerospace, and job-shop environments. The uncoated HX grade and fine-grain substrate make it particularly effective when sharp edge retention and low cutting forces are priorities.

Key Features

• Solid carbide fine-grain substrate in uncoated HX manufacturer grade for sharp, stable edges
• Square SEKR insert shape with four cutting edges per insert for extended tooling economy
• Positive rake (18 degrees) and 20-degree relief angle reduce cutting forces on non-ferrous and superalloy workpieces
• E07 chip breaker geometry controls chip flow in finish and semi-finish milling passes
• Maximum depth of cut of 0.3465 inches with an effective cutting edge length of 0.5000 inches
• Neutral hand orientation for flexible mounting in compatible cutter bodies

Compatibility

Designed for use with the SECO R220.13-12 cutter series using wedge-clamp insert holding. Insert size code 1203 corresponds to the SEKR-12 series. Confirmed compatible workpiece materials include non-ferrous metals (primary), cast iron, superalloys, and titanium.

Installation Notes

Installation is performed by tooling specialists or machinist-level technicians. Power down and lock out the machine spindle before seating or indexing inserts. Wedge-clamp systems require proper torque on the clamping wedge per the cutter body manufacturer specifications — do not use the insert torque values for the clamping fastener interchangeably. Inspect the cutter pocket seat for chips or debris before seating a new insert to ensure full contact and prevent insert rocking under load.