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The Esco Spherilok Dredge Cutterhead employs the very latest in Esco design and manufacturing technology. Each cutterhead is a custom engineered system. Esco dredging specialists carefully analyze customer requirements and operating conditions to arrive at the design criteria digging angle, arm spacing profile and size and tooth location and orientation. Esco engineers match the design criteria with field proven innovations to produce a cutterhead that provides maximum dredge productivity. Every Spherilok Dredge Cutterhead is unique, with proven features that match customer requirements. Examples of this customized design approach include: Hub mounted teeth assist a suction cutter dredge with a hydraulically advanced spud to step forward; Ring mounted teeth provide an extra measure of wear protection; Arm spacing, profile and tooth type are determined to suit the material being dredged