Iscar 5700570 Cbn Turning Insert DNGA431T-MC IB55

Product Description

The ISCAR 5700570 is a DNGA-style cubic boron nitride (CBN) turning insert designed for high-speed, hard-material turning applications. Manufactured in the IB55 grade, this uncoated CBN insert features a 55-degree diamond shape with a 0-degree relief angle and a 1/64-inch corner radius. The insert measures 15.5 mm (0.6102 inches) in length with a 1/2-inch inscribed circle and a 3/16-inch thickness. It is part of the ISCAR Isoturn series and is rated for a maximum depth of cut of 0.50 mm (0.0197 inches). Licensed machinists and CNC turning specialists install this insert in rigid toolholders configured for DNGA-geometry inserts.

This insert is engineered primarily for turning cast iron and other hard, abrasive workpiece materials coded H and K under ISO material classification. The Isoturn series targets precision finishing and semi-finishing passes where tight tolerances and surface integrity are critical. The TMC chip breaker geometry is suited for controlled chip formation in these demanding materials. Typical installation scenarios include CNC turning centers running hardened ferrous components in automotive, heavy equipment, and mold-and-die production environments.

Key Features

• Cubic boron nitride (CBN) insert material for hard and abrasive workpiece turning
• IB55 manufacturer grade, uncoated (bright finish) for consistent edge performance
• 55-degree diamond insert shape (DNGA style) with 0-degree relief angle for rigid, stable cutting
• 1/64-inch corner radius for a balance of edge strength and surface finish
• Maximum depth of cut: 0.50 mm (0.0197 inches) - optimized for finishing passes
• TMC chip breaker for controlled chip formation in cast iron and hard ferrous materials
• Multi-tipped insert design - multiple usable edges per insert

Compatibility

Designed as a replacement-style DNGA431 insert for rigid DNGA-geometry turning toolholders compatible with a 1/2-inch inscribed circle insert seat. Primary workpiece material compatibility is cast iron and hard ferrous alloys per ISO material codes H and K. Conforms to ISO 13399 insert geometry standards.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Power down and lock out the machine spindle before seating or removing the insert. Use a clamp-and-pin holding method as specified by the toolholder manufacturer, and verify insert seating before resuming operation. Do not exceed the rated maximum depth of cut for this insert geometry, as CBN inserts are sensitive to interrupted cuts and excessive radial load.