Sumitomo 19RBAPR Turning Insert VNMG331 AC830P Carbide

Product Description

The SUMITOMO 19RBAPR is a VNMG331 series turning insert manufactured from CVD-coated solid carbide in grade AC830P. It carries a 35-degree diamond (rhombic) insert shape with a neutral hand orientation and a negative rake and negative side clearance geometry. The inscribed circle measures 3/8 inches, insert thickness is 3/16 inches, and the corner radius is 1/64 inches. This insert is engineered for finishing and light machining operations and is suited to machinists and CNC turning specialists working on steel and stainless steel components in production or job-shop environments.

The 19RBAPR is designed for finishing and light machining passes on steel (ISO P) and stainless steel (ISO M) workpiece materials. The AC830P grade provides moderate wear resistance balanced with toughness, making it effective across a broad range of cutting conditions within those material groups. It is held via clamp or pin-lock tooling systems and conforms to both ANSI and ISO 13399 standards. Typical applications include OD turning on CNC lathes where tight tolerances and surface finish are the primary objectives.

Key Features

• CVD-coated solid carbide construction in grade AC830P for balanced wear resistance and toughness
• 35-degree diamond (V-shape, rhombic) insert geometry for access to tight shoulder angles
• ESU chip breaker geometry optimized for finishing and light machining cuts
• Negative rake and negative side clearance (clearance code N, tolerance code M) for rigid, stable cutting
• Compatible with both clamp and pin-lock insert holding methods
• Conforms to ANSI and ISO 13399 standards; ISO code VNMG160404N-SU

Compatibility

Designed for use in VNMG-style toolholders that accept 331 (ISO 160404) series inserts with clamp or pin-lock holding methods. Primary workpiece material compatibility includes steel (ISO P) and stainless steel (ISO M). Material grades C5, C5A, and C6 apply.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Power down and lock out the machine spindle before indexing or replacing inserts. Seat the insert fully and evenly against the toolholder pocket before tightening the clamp or pin to prevent micro-movement under cutting load. Inspect the insert seating pocket for chips or debris before each insert change to maintain accurate tool geometry.