Sumitomo Electric Industries, Ltd. RNMN32S-BNS800 Insert

Sumitomo Electric RNMN32S-BNS800 Insert is a round indexable cutting insert from Sumitomo's RNMN series, designed for precision turning on CNC lathes. The BNS800 grade marks the cutting material used for this insert, part of Sumitomo's BN/PCBN family, which is associated with enhanced hardness and wear resistance for demanding turning tasks. This insert is intended to work with Sumitomo RNMN holders, aligning with the brand's standard system to provide reliable seating and consistent chip control during machining. The RNMN32S-BNS800 delivers stable performance under high-speed turning and with tough materials, helping to maintain precise dimensions and smooth surface finishes throughout its usable life. In Sumitomo's catalogs, BNS800 is described within the BN/PCBN insert lineup, underscoring its suitability for difficult-to-cut applications where edge life and process reliability are important. Common applications described for BN/PCBN grades include finishing and roughing of hard-to-cut materials, where edge life and dimensional stability are critical.