A land preparation tool includes a cutting surface having a blade and a mounting interface opposite the cutting surface. The mounting interface of the land preparation tool is configured to detachably connect to a tool holder having a top surface, an end surface, a mounting surface opposite the end surface, and opposing first and second side surfaces extending between the end surface and the mounting surface. The mounting surface has an apex extending downwardly from the top surface and first and second mounting faces. The first mounting face extends inwardly from the first side surface toward the apex and the second mounting face extends inwardly from the second side surface toward the apex.

A land preparation tool includes a cutting surface having a blade and a mounting interface opposite the cutting surface. The mounting interface of the land preparation tool is configured to detachably connect to a tool holder having a top surface, an end surface, a mounting surface opposite the end surface, and opposing first and second side surfaces extending between the end surface and the mounting surface. The mounting surface has an apex extending downwardly from the top surface and first and second mounting faces. The first mounting face extends inwardly from the first side surface toward the apex and the second mounting face extends inwardly from the second side surface toward the apex.

Timber harvesting device, having an extension arm and a sawing unit and gripper unit attached to the extension arm. The gripper unit has a gripper pair for a tree trunk, and the sawing unit has a cutting element, e.g., a chain saw, which is arranged to be pivotable out of a saw box for severing the tree trunk. The saw box is pivotably arranged about a pivot axis on the gripper unit and is connected to the gripper unit via a spring element and a piston-cylinder unit. The spring element defines a predetermined cutting position of the saw box via a restoring torque about the pivot axis, and the saw box is pivotable by the piston-cylinder unit into an inclined position which is tilted relative to the cutting position. The bearing of the piston-cylinder unit has a free movement space in the cutting position of the saw box.

Timber harvesting device, having an extension arm and a sawing unit and gripper unit attached to the extension arm. The gripper unit has a gripper pair for a tree trunk, and the sawing unit has a cutting element, e.g., a chain saw, which is arranged to be pivotable out of a saw box for severing the tree trunk. The saw box is pivotably arranged about a pivot axis on the gripper unit and is connected to the gripper unit via a spring element and a piston-cylinder unit. The spring element defines a predetermined cutting position of the saw box via a restoring torque about the pivot axis, and the saw box is pivotable by the piston-cylinder unit into an inclined position which is tilted relative to the cutting position. The bearing of the piston-cylinder unit has a free movement space in the cutting position of the saw box.

A timber working device, comprising a frame, having a feed axis, a drive system, configured to feed at least one stem along the feed axis, at least a pair of upper knives or lower knives movably attached to the frame, wherein the knives are configured to be controllable each by an actuator to open and close around a stem, a tilt mechanism comprising a controllable tilt bracket pivotably attached to the frame, to control a tilt position of the frame in relation to the tilt bracket.