Sumitomo TPMT220.5ES Indexable Carbide Inserts

Sumitomo TPMT220.5ES is a 60-degree triangular indexable carbide insert designed for steel turning, offered in the ACE COAT AC820P grade for improved wear resistance. The insert features a 0.250-inch inscribed circle (6.35 mm), a 0.125-inch thickness (3.175 mm), and a nose radius of 0.0078 inches (0.20 mm), providing reliable seating in TPMT holders and consistent cutting performance. This ES-version includes a chipbreaker configuration to promote controlled chip break and smoother breakout during turning, helping maintain part surface finish under typical machining conditions. The TPMT geometry combines a positive edge with a 60-degree inscribed circle, making it suitable for finishing and general-purpose steel turning in CNC lathes with standard TPMT bodies. AC820P is a coated carbide grade developed for steel turning, offering wear resistance and long tool life in demanding steel applications; the TPMT220.5ES variant pairs this coating with Sumitomo’s triangular TPMT geometry to deliver stable form, reliable tool life, and predictable performance across cycles.