Value Collection ICC21020L Turning Insert TPGH321 Carbide

Product Description

The VALUE COLLECTION ICC21020L is a solid carbide turning insert designed for precision metal cutting on CNC lathes and manual turning centers. Manufactured to ANSI insert code TPGH321 and ISO code TPGH160304, this uncoated carbide insert features a 60-degree triangular shape with a positive side clearance and an 11-degree relief angle. The inscribed circle measures 3/8 inches (0.3750 inches) and the corner radius is 1/64 inches (0.0156 inches). Grade I22 carbide with a bright, uncoated finish provides a sharp cutting edge suited for finishing and semi-finishing passes where coating adhesion or heat are less critical. Licensed machinists and CNC operators are the primary installers of this insert type.

This insert is suited for turning applications involving non-ferrous metals, cast iron, stainless steel, and high-temperature alloys, corresponding to primary workpiece material codes K, M, N, and S. The TPGH style with a screw-holding method provides secure seating in compatible toolholders during both light and moderate interrupted cuts. The H chip breaker geometry helps control chip flow during finishing operations. Typical applications include OD turning, facing, and light profiling on production or job-shop lathes where dimensional accuracy and surface finish are priorities.

Key Features

• Solid carbide grade I22 with bright uncoated finish for sharp, consistent cutting edges
• 60-degree triangular insert shape (T) with positive side clearance for reduced cutting forces
• 11-degree relief angle provides clearance and reduces flank wear on finishing passes
• 1/64 inch (0.0156 inch) corner radius suited for fine-finish turning applications
• H chip breaker geometry for effective chip control in finishing and semi-finishing
• Screw-held (clearance code P, tolerance code G) for rigid, repeatable toolholder seating

Compatibility

Designed to fit standard TPGH-style screw-clamp toolholders accepting a 321 ANSI size code insert with a 0.1770-inch hole diameter. Consult your toolholder manufacturer specifications to confirm seat geometry and screw compatibility before installation.

Installation Notes

Installation is performed by a qualified machinist or CNC operator. Ensure the machine spindle is fully stopped and all motion is locked out before changing inserts. Use the appropriate torx or hex key specified by the toolholder manufacturer to seat the clamping screw; do not over-torque the insert screw, as carbide is brittle and may fracture. Inspect the insert pocket and seating surface for chips or debris before installing a new insert to ensure proper seating and dimensional repeatability.