The invention concerns a knife seat arrangement on a cutting shaft of a shredding machine, having a knife seat groove and cutting tool arranged therein, whereby the cutting tool, fastened so as to be detachable in the knife seat groove, adjoins a flat back surface on a flat front surface of a stop element and the stop element adjoins a corresponding end surface of the knife seat groove with a semicylindrical rear wall, whereby the stop element has a protrusion, situated in a form-locking manner in a corresponding recess of the groove bottom and directed inward, in the area of the groove bottom of the knife seat groove, said protrusion partially gripping under the cutting tool and adjoining it, so that the stop element is supported radially in the groove by the cutting tool. In addition, the invention concerns a knife seat arrangement in a shredding machine with knife seat recesses distributed about the periphery, spirally wound, whereby cutting tools can be placed in the knife seat recesses and a number of knife seat recesses are placed on a common radial shaft plane, so that several cutting tools are situated on a common, radial cutting tool flight circle, whereby, adjusted to the desired cutting force, the knife seat recesses of a common radial plane of the shaft are uniformly furnished with cutting tools and that knife seat recesses not furnished with cutting tools are covered or filled with cover elements.

A mantle for use with a rock crushing apparatus comprising an essentially tubular mantle body having side walls defining an exterior surface and a hollow interior being adapted to fit over the main shaft of a rock crushing apparatus. Wear plates for attachment to the exterior of the mantle body are provided, an adhesive filling material being used between the mantle body and the wear plates. A system of locking bolts are used to removably locate the wear plates to the outer surface of the mantle body.

The invention relates to a novel device for fixing a partition to a shell (4) of a tube mill in which the partition comprises a cast framework (1), in steel or in cast iron consisting of several sectors (15) provided with a set of fixing holes (32) in their peripheral face (3), each sector (15) being independent of the other sectors, characterized in that it possesses an annular intermediate baseplate (100) arranged facing the said shell (4), providing a space between the shell (4) and the intermediate baseplate (100), which space is chosen so that the inner face of the intermediate baseplate (100) forms a reference surface at the nominal diameter of the periphery of the said cast sectors (15), this space being set with the aid of adjustment elements (110) and the intermediate baseplate (100) being provided with holes (102) which can be matched to the said set of fixing holes (32) in the peripheral face (3) of the sectors (15) in order to enable the latter to be fixed by means of bolts in the holes of the intermediate baseplate (100), means (101, 41, 42) being provided for rigidly fastening the intermediate baseplate (100) to the shell (4). The invention also relates to the method for the operation of the device.

A liner for a corrugated debarking drum having a continuously undulating outer wall with an interior surface including an axially extending concave portion includes an elastomeric compressible body having an inner surface adapted to be positioned over the concave portion and an outer surface opposite the inner surface and a support secured to the body and adapted to be bonded to the interior surface without perforating the outer wall.

An adapter for mounting a liner to a first mill having an inner diameter with a first contour. The liner has a back face with a second contour shaped for mating with a second mill. The adapter includes a top face and a bottom face. The top face supports the back face of the liner. The bottom face has a contour formed for mating with the contour of the first mill.