Mitsubishi 251256 Carbide Turning Insert Ccgt VP10RT

Product Description

The MITSUBISHI 251256 is a CCGT-series carbide turning insert with grade VP10RT and an AlTiN PVD coating, designed for finishing operations in steel, stainless steel, cast iron, and superalloy and titanium workpieces. The insert features an 80-degree diamond (rhombic) shape with a positive rake and positive side clearance, producing clean, precise cuts at light depths. With a corner radius of 0.0080 inches and an inscribed circle of 0.2500 inches, this insert is optimized for tight-tolerance finishing passes where surface finish and dimensional accuracy are critical. It ships individually but requires a minimum order of 10 units per purchase.

This insert is suited for CNC turning centers, lathes, and boring operations in job shops and production environments handling steel and stainless steel components, cast iron parts, and superalloy or titanium workpieces. The FJ chip breaker geometry is engineered for finishing applications, controlling chip formation at shallow depths of cut up to 0.0852 inches. It is held in place by screw-type toolholders compatible with the CCGT insert pocket style. The neutral hand orientation allows flexible use across both turning and facing passes on standard and CNC-controlled equipment.

Key Features

• AlTiN PVD coating provides high wear resistance across steel, stainless steel, and cast iron workpieces
• 80-degree diamond (rhombic) insert shape with positive rake for reduced cutting forces during finishing
• FJ chip breaker geometry optimized for finishing and light-depth-of-cut operations
• 2 usable cutting edges per insert extend tool life between changeovers
• Honed cutting edge style improves edge integrity and surface finish on finished components
• Screw-holding method ensures secure, repeatable seating in compatible CCGT toolholders
• Multi-use capability across turning, facing, and boring operations

Compatibility

Designed for use in screw-type toolholders accepting CCGT-style inserts with an ANSI insert code of CCGT21.50.5 and ISO insert code CCGT060202. Compatible with applications involving steel (P), stainless steel (M), cast iron (K), and superalloys and titanium (S) workpiece materials. Also cataloged under ISO code CCGT060202-FJ and manufacturers catalog number CCGT21.50.5FJ.

Installation Notes

Installation is performed by machining professionals using compatible CCGT screw-type toolholders. Power down and lock out the machine spindle before indexing or replacing inserts. Use the correct torque wrench for the insert clamping screw to avoid insert cracking or improper seating. Inspect the toolholder pocket for wear or debris before seating a new insert, as contamination can affect runout and surface finish.