Iscar 5507627 TPMT321 IC9350 Carbide Turning Insert

Product Description

The ISCAR 5507627 is a TPMT321 triangular turning insert in the Isoturn series, designed for precision metal cutting on CNC and manual lathes. The insert is manufactured from solid carbide and features a CVD-applied multilayer coating of TiCN, Al2O3, and TiN under the IC9350 manufacturer grade designation. The triangular shape with a 60-degree included angle and positive rake geometry reduces cutting forces and promotes chip control. At 16.5 mm in length with a 3/8 inch inscribed circle and a 1/64 inch corner radius, this insert is sized for moderate to light finishing passes. Screw-style holding secures the insert in the pocket with consistent repeatability across tool changes.

This insert is engineered for turning stainless steel and carbon or alloy steel workpieces, matching ISO material codes M and P respectively. It fits standard TPMT-style insert pockets on turning toolholders designed around the 3/8 inch inscribed circle format. Typical applications include external turning, facing, and light profiling operations in production environments. The maximum depth of cut is 4.0 mm (0.1575 inches). Licensed machinists and CNC operators in job shop, aerospace, and general manufacturing settings are the primary installers and users of this insert.

Key Features

• Solid carbide substrate with IC9350 grade — optimized for stainless steel and steel cutting
• CVD multilayer coating: TiCN base, Al2O3 thermal barrier, TiN outer layer
• Positive rake geometry reduces cutting forces and heat buildup at the edge
• 1/64 inch corner radius suits finishing and semi-finishing operations
• Screw-style insert holding method provides rigid, repeatable seating in the pocket
• Compliant with ISO 13399 tooling data standard for CAM and tool management integration

Compatibility

Designed for use in TPMT-style turning toolholders accepting a 3/8 inch inscribed circle insert with screw clamping. Compatible with workpiece materials classified under ISO material codes M (stainless steel) and P (carbon and alloy steel).

Installation Notes

Insert replacement and toolholder service should be performed by a qualified machinist with the machine fully powered down and the spindle locked. Use the correct torque screwdriver for the insert clamping screw — follow the toolholder manufacturer's torque specification for the pocket size. Inspect the insert pocket seat and clamping screw threads for wear or debris before seating a new insert. Do not operate with a cracked or chipped insert.