Iscar 5540004 Turning Insert Ccgt 3-1-AS IC20 Carbide

Product Description

The ISCAR 5540004 is a solid carbide, uncoated turning insert in the Isoturn series, designed for precision finishing operations on CNC and manual lathes. Identified by ANSI code CCGT 3-1-AS and ISO code CCGT09T304, this insert features an 80-degree diamond (rhombic) shape with a positive rake and positive side clearance geometry. The IC20 grade delivers high wear resistance while maintaining toughness, making it well suited for finishing passes on stainless steel, cast iron, and aluminum. The insert measures 0.3819 inches in length with a 3/8-inch inscribed circle and a 1/64-inch corner radius. It is held in place by a screw clamp and meets ISO 13399 standards. Machinists and CNC programmers select this grade when surface finish and dimensional accuracy are the priority.

This insert is intended for finishing-grade turning applications in general metalworking and precision machining environments. The AS chip breaker geometry is optimized for light, consistent cuts typical of finish-turning cycles. Primary workpiece materials include stainless steel (M), cast iron (K), and aluminum and non-ferrous materials (N). Secondary workpiece material codes include H and N. The insert is suited for both production and job-shop environments where tight tolerances and clean surface finishes are required at moderate to high cutting speeds.

Key Features

• IC20 uncoated solid carbide grade with high wear resistance and toughness for stainless steel, cast iron, and non-ferrous materials
• 80-degree diamond (rhombic) insert shape with positive rake for reduced cutting forces during finishing operations
• AS chip breaker designed for finishing-grade depth of cut up to 0.0984 inches (2.50 mm)
• 1/64-inch corner radius for sharp, precise edge definition on finish passes
• Screw-clamped insert holding method for secure, repeatable seating in compatible toolholders
• Meets ISO 13399 tooling data standards for compatibility with modern CAM and tooling management systems

Compatibility

Designed for use in CCGT-style screw-clamp turning toolholders accepting a 3/8-inch inscribed circle, 5/32-inch thick insert with a 7-degree relief angle and positive rake geometry, per ANSI size code 3-1 and ISO size code 09T304.

Installation Notes

Installation is performed by a qualified machinist or CNC tooling technician. Ensure the machine spindle is stopped and the turret or toolpost is indexed to a safe position before changing inserts. Use the appropriate Torx or hex key to seat the clamping screw to the toolholder manufacturer's specified torque. Inspect the insert pocket and clamping screw for wear or debris before seating a new insert, and verify the insert is fully seated and locked before resuming cutting operations.