A dredge cutterhead comprises a base member and a plurality of forwardly projecting spiraling arms, each arm includes a front edge having a plurality of spaced locator formations having an identically shaped, rigid, fixed locator structure, the locator structures are shaped to mate positively with a digging component to set properly the position of the digging component on the arm. Each locator formation includes a locator nose projecting forwardly from the arm, which can be set in a recess positioned along the front edge of the arm. Each locator formation can further include a pair of spaced apart surfaces having a particular shape and spacing, wherein the spaced apart surfaces of at least two locator formations are oriented differently relative to the front edge of the arm.
