CoroBore 820 is a boring tool introduced by Sandvik Coromant. It is actually a modular device engineered for an inside coolant supply with a 35 - 260 mm boring rate. It incorporates an up to 4 x diameter and has a particular flexible diameter length, except for the reamer. In addition, it is composed of an adapter, basic holder, and three cutting edges best suited for harsh applications and exceptional infiltration. Also, the CoroBore 820 tool has an excellent boring head characterized by a cartridge with a reamer that consists of a close pitch head with glued blades and shaft.