Abstract: in a cylinder and/or a roller and in a method for producing and/or for the maintenance of a cylinder and/or roller, a metal layer (8, 9, 10) is applied, at least in parts, to the outer surface (2) of the cylinder (1, 1?) and/or the roller (1?). The metal layer (8, 9, 10) has a ductile metallic matrix (4) having embedded hard material particles (5). Such a cylinder and/or roller can be used in a device (11) for controlling the wear and tear of a cylinder (1, 1?) and/or roller (1?), the surfaces (2?) of which are subjected to wear and tear. The method for producing the cylinder and/or roller, the cylinder and/or roller, and the device for controlling wear and tear, allow the maintenance, costs and labour of the cylinder and/or roller to be reduced.

Abstract: In order to increase the service life of a grinding tool (14, 16, 24a, 24b), it is coated with a wear-resistant material, wherein the coating (30, 301) has a ductile metallic parent material (32) with hard particles (34) embedded therein.