Sumitomo 19P7BPB Turning Insert CCMT21.50.5ESU AC8025P

Product Description

The SUMITOMO 19P7BPB is a solid carbide turning insert in the CCMT style, designed for precision metal-cutting operations on CNC lathes and turning centers. This insert carries the manufacturer grade AC8025P with a CVD coating applied over the carbide substrate, improving wear resistance and thermal stability during interrupted or continuous cuts on steel workpieces. The insert features an 80-degree diamond shape with a neutral hand orientation, a 1/4-inch inscribed circle (0.2500 inches), and a 0.0078-inch corner radius. It is held in place by a screw-type clamping system and is suited for positive-rake toolholders. Licensed machinists and CNC operators working in job shops or production environments install this type of insert.

This insert is intended for primary use on steel workpieces, designated by the P-code workpiece material classification. The CCMT style with the ESU chip breaker geometry is well suited for light-to-moderate depth-of-cut finishing and semi-finishing passes on low-to-medium alloy steels. The screw-on clamping method makes it compatible with standard CCMT-style toolholders designed around the CC series insert format. This insert ships individually but is subject to a minimum order quantity of 10 units.

Key Features

• AC8025P grade solid carbide substrate with CVD coating for extended tool life on steel
• 80-degree diamond insert shape (C) with 7-degree relief angle and positive rake for reduced cutting forces
• ESU chip breaker geometry optimized for finishing and semi-finishing steel cuts
• 0.0078-inch corner radius for precise surface finish control
• Screw-type insert holding method compatible with standard CCMT toolholders
• Meets ANSI and ISO 13399 standards; ISO code CCMT060202N-SU

Compatibility

Designed for use in screw-clamp toolholders accepting CCMT-style inserts in the CC series format. Consult the toolholder manufacturer specifications to confirm bore diameter and insert seat dimensions before installation.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Before indexing or replacing the insert, power down the spindle and engage the machine lockout per shop safety procedures. Use a torque wrench or calibrated insert screw driver to seat the clamping screw without over-torquing, which can crack the carbide. Inspect the insert pocket and seat for chips or debris before seating the new insert to ensure proper contact and runout.