Seco 00014858 Pcbn Turning Insert RNMN32S 300P Round 3/8 in

Product Description

The SECO 00014858 is a round Polycrystalline Cubic Boron Nitride (PCBN) turning insert in the RNMN-Flat Top series, designed for high-performance single-point turning operations on CNC and conventional lathes. Carrying manufacturer grade CBN300P and coated with a multilayer PVD TiAlN and TiN finish, this insert delivers the edge hardness and thermal resistance required when cutting cast iron, super-alloys, and titanium at production tolerances. The 360-degree round shape provides 10 usable cutting edges, maximizing cost-per-edge value. Insert length is 0.3748 inches with an inscribed circle diameter of 0.3748 inches and a corner radius of 0.1874 inches. It is held by a clamp-style toolholder and carries a negative rake geometry with a chamfered and honed cutting edge style.

This insert is suited for facing, profiling, and turning applications in both production and job-shop environments. Primary workpiece material is cast iron (ISO material code K), with secondary suitability for super-alloys and titanium (ISO material code S). Applicable material grades are K01, K10, K20, and K30, covering a broad range of cast iron hardness classes. It is identified by ISO code RNMN090300S and industry standard number RNMN32S, making it straightforward to cross-reference against toolholder catalogs and insert seats in that style. Maximum depth of cut is 0.0320 inches.

Key Features

• Polycrystalline Cubic Boron Nitride (PCBN) substrate with CBN300P grade for hardened and abrasive workpiece materials
• Multilayer PVD TiAlN and TiN coating for extended tool life in cast iron and super-alloy applications
• Round 360-degree insert shape provides 10 cutting edges per insert
• Chamfered and honed cutting edge style reduces chipping risk on entry and exit
• Neutral hand orientation fits a wide range of RNMN-style clamp toolholders
• Compliant with ANSI and ISO insert standards for drop-in compatibility

Compatibility

Designed as an OEM-style replacement or equivalent for RNMN-Flat Top series clamp-style toolholders accepting a 3/8 inch inscribed circle round insert with a 0.1730 inch hole diameter. Cross-reference ISO code RNMN090300S and industry standard number RNMN32S when matching to toolholder seat specifications.

Installation Notes

Installation is performed by a qualified machinist or toolroom technician following the toolholder manufacturer's clamping torque specifications. Power down and lock out the machine spindle before seating or indexing the insert. Inspect the insert pocket and seating surface for chips or debris before clamping, as contamination can cause insert tipping and premature edge failure. Verify coolant flow direction and depth-of-cut settings against the 0.0320 inch maximum depth of cut before initiating the first pass.