Value Collection TPEG321P IC66 Turning Insert 3/8 in

Product Description

The VALUE COLLECTION TPEG321P IC66 is a solid carbide turning insert designed for precision metal cutting on CNC lathes and turning centers. Coated with TiN (titanium nitride) for improved wear resistance and surface hardness, this insert features a 60-degree triangular geometry with an 11-degree relief angle and a positive side clearance. The inscribed circle measures 3/8 inches, insert thickness is 1/8 inch, and the corner radius is 1/64 inch. It is secured via screw-type clamping and suits medium to general-purpose turning operations on steel and stainless-steel workpiece materials.

This insert is suited for use in screw-on toolholders that accept TPEG-style 60-degree triangular inserts. Typical applications include external turning, facing, and contouring on CNC or manual lathes in production and job-shop environments. It is commonly used by machinists working with steel and stainless workpieces where a positive-relief geometry and chip-breaking profile are required for clean, controlled chip evacuation. The ANSI insert code is TPEG321 and the ISO equivalent code is TPEG160304.

Key Features

• TiN coating provides increased surface hardness and extended wear life versus uncoated carbide
• 60-degree triangle shape with positive side clearance reduces cutting forces and heat buildup
• 11-degree relief angle suits a broad range of turning and facing applications
• Screw-type insert holding provides secure, repeatable seating in compatible toolholders
• G-style chip breaker geometry promotes controlled chip formation and evacuation
• C6 material grade carbide substrate balances toughness and hardness for general steel turning

Compatibility

Designed for use in TPEG-style screw-clamp toolholders accepting a 60-degree triangular insert with a 3/8-inch inscribed circle, 1/8-inch thickness, and 0.173-inch hole diameter. ANSI insert code TPEG321; ISO insert code TPEG160304. Primary workpiece material codes M and P indicate suitability for stainless steel and carbon or alloy steel applications.

Installation Notes

Installation should be performed by a qualified machinist with the machine powered off and all motion stopped before changing inserts. Use the appropriate torx or hex key to seat and torque the clamping screw per the toolholder manufacturer specifications. Inspect the insert pocket and clamping screw for wear or damage before seating a new insert. Never force a misaligned insert into the pocket, as this can damage the pocket seat and affect dimensional accuracy.