A tool includes a nut and a bearing module. The nut is engageable with a screw connected to a spacer to allow a hammer to hit the nut to remove the screw from the spacer. The bearing middle is located between the nut and the spacer to allow smooth rotation of the nut relative to the screw to extend the screw through the spacer, thereby connecting the screw to the spacer.

A tool includes a nut and a bearing module. The nut is engageable with a screw connected to a spacer to allow a hammer to hit the nut to remove the screw from the spacer. The bearing middle is located between the nut and the spacer to allow smooth rotation of the nut relative to the screw to extend the screw through the spacer, thereby connecting the screw to the spacer.

The present invention relates to an automated torque device or tool for the installation and extraction of fastening elements for mill liners, such as nuts and washers, with a high torque capacity and controlled speed for the installation and/or extraction of the fastening elements of mill liners, comprising at least one powertrain means (2), at least one axial compensation means (3), at least one radial compensation means (4), at least one grip element (5), at least one tool exchanging means (6), at least one chassis (7), and at least one communication and control means (8) which allows generating the necessary information and providing feedback to the system for operating the tool by means of different sensors arranged in the different components of the tool.