Value Collection TCN21018B Turning Insert SPGH433 TCN55

Product Description

The VALUE COLLECTION TCN21018B is a solid carbide turning insert manufactured to ANSI code SPGH433 and ISO code SPGH120412. Coated with titanium nitride (TiN) in TCN55 grade, this insert is designed for external turning operations on metalworking lathes and turning centers. It features a 90-degree square shape with a positive side clearance and an 11-degree relief angle. The 1/2-inch inscribed circle and 3/64-inch corner radius make it suitable for medium-depth finishing and semi-finishing passes. A screw-on holding method provides secure clamping in compatible toolholders. Licensed machinists and CNC operators install this insert in production and job-shop turning applications.

This insert is suited for turning operations on ferrous and non-ferrous workpiece materials, indicated by primary workpiece material codes M and P. The SPGH style with positive clearance geometry works well in both manual lathe and CNC turning center setups. The H-style chip breaker promotes reliable chip control during continuous cuts. It is packaged individually and sold in minimum order quantities of 10 units, making it appropriate for shop stock and toolcrib replenishment.

Key Features

• Solid carbide construction with TiN coating in TCN55 manufacturer grade for wear resistance
• ANSI insert code SPGH433 and ISO insert code SPGH120412 for standardized toolholder compatibility
• 90-degree square insert shape with positive side clearance and 11-degree relief angle
• 3/64-inch (0.0469 inch) corner radius suited for semi-finishing and finishing cuts
• H-style chip breaker for consistent chip control during turning operations
• Screw-on holding method for secure, repeatable seating in SPGH-style toolholders

Compatibility

Designed for use in SPGH-style screw-on turning toolholders accepting a 1/2-inch inscribed circle square insert with a 0.175-inch hole diameter, conforming to ANSI SPGH433 and ISO SPGH120412 standards.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Power down and lock out the machine before indexing or replacing the insert. Use the correct torque wrench and manufacturer-specified insert screw to seat the insert without cracking the carbide substrate. Inspect the toolholder pocket and clamping screw for wear or debris before seating a new insert.