An apparatus for cutting involves a support configured to stably support the apparatus on a surface, an articulated boom rotatably mounted on the support proximate a first end of the boom, and a hydraulically operated end effector mounted on the boom proximate a second end of the boom. The end effector has a cutter configured to cut an object, and preferably also has an immobilizer (e.g. a gripper) configured to immobilize the object while being cut by the cutter. The end effector has a swivel between the cutter (and/or immobilizer) and the boom, the swivel rotatable continuously through 360° to rotate the cutter (and/or immobilizer) continuously through 360°. The swivel has an internal fluid conduit through which hydraulic fluid may be transported from a hydraulic fluid reservoir to the cutter to hydraulically operate the cutter.