The new inserts combine roughing and medium finishing chipbreakers with Seco’s Duratomic grade technology. According to Seco, the -RR93 chipbreaker boosts tool life, improves productivity, increases product reliability, enhances chip management and generates a superior surface finish. This new design replaces the -RR94 geometry.
For medium finishing applications in steels, difficult stainless steels and super alloys, the -R3 geometry is designed to offer optimally positioned grooves that control chips at depths of cut as small as 0.059" (1.5 mm), at high feed rates from 0.024"/rev to 0.047"/rev (0.6 mm/rev to 1.2 mm/rev) and at cutting speeds from 3.543"/min. to 6.299"/min. (90 m/min. to 160 m/min). The -R3 geometry replaces the previous -R2 geometry.
To produce smoother finishes, such as those required for railway wheels, as well as for medium roughing applications with difficult materials, RCMT20-R3 positive screw-clamped additions to the range can reduce machining vibration significantly. Dedicated insert edge treatments and retained functional toughness are intended to arrest comb cracks and increase edge security.
The new RCMX and RCMT geometries feature the Duratomic CVD aluminum-oxide coating process, designed to optimize mechanical and thermal properties for enhanced performance. This technology also provides used edge detection, which can reduce insert cutting-edge waste.
The new -RR93 and -R3 geometries and Duratomic grades have been tested in most common railway wheel materials, including R7, R8, R9, M1, Class B and Class C.
For more on cutting tools, check out our Cutting Tool ABCs.