Value Collection TCN28910D Turning Insert CPG421 TCN55

Product Description

The VALUE COLLECTION TCN28910D is a solid carbide turning insert with a TiN (titanium nitride) coating, designed for use on CNC lathes and manual turning centers. It carries the ANSI insert code CPG421 and the ISO equivalent CPG120304. The insert features an 80-degree diamond (rhombic) shape with an 11-degree relief angle and a positive side clearance geometry. The inscribed circle measures 0.5 inches and the corner radius is 0.0156 inches (1/64 inch). Insert thickness is 0.125 inches. The flat-top chip breaker design suits a wide range of turning operations where chip control is managed by workpiece material and feed selection.

This insert is suited for general-purpose external and internal turning operations on steel and stainless steel workpieces, as indicated by the primary workpiece material codes M and P. The CPG-style insert is held in place by a clamp-style toolholder. It is appropriate for production machining environments where consistent TiN-coated carbide performance at grade C5 is required. Machinists and CNC operators in job shops or production facilities are the typical end users for this insert style.

Key Features

• Solid carbide substrate with TiN coating for improved wear resistance on steel and stainless materials
• 80-degree diamond (rhombic) insert shape provides a strong cutting edge with good accessibility for profiling
• Positive side clearance reduces cutting forces and tool pressure
• Flat-top chip breaker geometry for straightforward chip control in general turning
• Clamp-style insert holding method for secure seating in CPG-compatible toolholders
• ANSI insert code CPG421 and ISO insert code CPG120304 for direct cross-referencing

Compatibility

Designed for use in CPG-style clamp-type toolholders accepting a size 421 (ISO 120304) insert with a C-shape 80-degree diamond profile and positive clearance geometry.

Installation Notes

Installation of turning inserts should be performed by a qualified machinist or CNC operator with the machine powered down and the spindle locked. Use the appropriate torque wrench and clamp screw specified by the toolholder manufacturer to seat the insert securely without over-tightening. Inspect the insert pocket and clamp for debris or wear before seating a new insert. Always verify tool offset data after an insert change before resuming a cut.