A sliding ring for a grinding device consisting of a grinding element and a hood covering the grinding element and a sliding ring attachable to the side of the hood facing a surface to be machined, the sliding ring having a sliding surface provided for sliding on the surface to be machined, the sliding ring consisting of at least one elastic component and a sliding component, the sliding surface being formed on the sliding component and the elastic component being arranged on the side of the sliding component opposite the sliding surface.

A drum sander having a fin for deflecting airflow around the drum and directing dust and debris to a dust collecting outlet. The fin includes a first section at a first angle and a second section at a second angle that directs air movement generated by the operating drum toward the dust collecting outlet. The free edge of the fin is shaped to wrap partially around the drum in two helical inclined planes. A tool free adjustment of parallelism may be provided. The workpieces are pulled through the sander rather than being pushed through. Lightweight materials reduce stress on the assembly. Heat is dissipated by the configuration and material of the drum.

A drum sander having a fin for deflecting airflow around the drum and directing dust and debris to a dust collecting outlet. The fin includes a first section at a first angle and a second section at a second angle that directs air movement generated by the operating drum toward the dust collecting outlet. The free edge of the fin is shaped to wrap partially around the drum in two helical inclined planes. A tool free adjustment of parallelism may be provided. The workpieces are pulled through the sander rather than being pushed through. Lightweight materials reduce stress on the assembly. Heat is dissipated by the configuration and material of the drum.

The invention relates to a centerless cylindrical grinding machine (100) for throughfeed and plunge grinding of arbitrary workpieces comprising a first drivable positioning axis X.sub.S for a grinding headstock (10) with a grinding wheel (11) rotatable about an axis of rotation (12) and a second drivable positioning axis X.sub.R for a regulating wheel headstock (20) with a regulating wheel (21) rotatable about an axis of rotation (22), and a workpiece support (32) arrangeable substantially between the grinding headstock (10) and the regulating wheel headstock (20), wherein a further drivable positioning axis Y.sub.W, extending orthogonal to at least one of the positioning axes X.sub.S and X.sub.R, is mounted for a carriage (31) on a carriage track (30), via which the workpiece support (32) is movable, wherein the grinding headstock (10) and the regulating wheel headstock (20) are arranged in a first area (41) of a machine bed (40) and the carriage track (30) is at least partially arranged in a second area (42) of the machine bed (40), wherein the second area (42) of the machine bed (40) has a lesser extension in a direction parallel to the positioning axis Y.sub.W than the first area (41) of the machine bed (40).

The invention relates to a centerless cylindrical grinding machine (100) for throughfeed and plunge grinding of arbitrary workpieces comprising a first drivable positioning axis X.sub.S for a grinding headstock (10) with a grinding wheel (11) rotatable about an axis of rotation (12) and a second drivable positioning axis X.sub.R for a regulating wheel headstock (20) with a regulating wheel (21) rotatable about an axis of rotation (22), and a workpiece support (32) arrangeable substantially between the grinding headstock (10) and the regulating wheel headstock (20), wherein a further drivable positioning axis Y.sub.W, extending orthogonal to at least one of the positioning axes X.sub.S and X.sub.R, is mounted for a carriage (31) on a carriage track (30), via which the workpiece support (32) is movable, wherein the grinding headstock (10) and the regulating wheel headstock (20) are arranged in a first area (41) of a machine bed (40) and the carriage track (30) is at least partially arranged in a second area (42) of the machine bed (40), wherein the second area (42) of the machine bed (40) has a lesser extension in a direction parallel to the positioning axis Y.sub.W than the first area (41) of the machine bed (40).

A dust shroud having a shroud body with a vacuum port and a tool connection, the shroud body including a top wall and at least one side wall extending downwardly from about a perimeter of the top wall that defines a dust receiving opening, the shroud body having a top wall opening and the tool connection including a flexible fitting with a flexible fitting base joined to the top wall and extending within the top wall opening, the flexible fitting including a plurality of flexible fingers with a base finger portion and an outer finger portion that extends away from top wall and is selectively with a mounting point of the hand held tool and the flexible fingers allowing selective controlled relative movement between the dust shroud and the hand held tool, the fingers having a finger spacing between adjacent flexible fingers and the outwardly extending flexible fingers having a finger length between the top wall and the distal finger end that is greater than 0.75 inches allowing for selective adjustment and relative movement between the dust shroud and the associated hand held grinder.

A dust shroud having a shroud body with a vacuum port and a tool connection, the shroud body including a top wall and at least one side wall extending downwardly from about a perimeter of the top wall that defines a dust receiving opening, the shroud body having a top wall opening and the tool connection including a flexible fitting with a flexible fitting base joined to the top wall and extending within the top wall opening, the flexible fitting including a plurality of flexible fingers with a base finger portion and an outer finger portion that extends away from top wall and is selectively with a mounting point of the hand held tool and the flexible fingers allowing selective controlled relative movement between the dust shroud and the hand held tool, the fingers having a finger spacing between adjacent flexible fingers and the outwardly extending flexible fingers having a finger length between the top wall and the distal finger end that is greater than 0.75 inches allowing for selective adjustment and relative movement between the dust shroud and the associated hand held grinder.

A sample grinder includes a base having a bowl and a rotatable drive plate to operably support a grinding wheel. A head is configured to support a specimen holder and has a first drive for rotational drive of the specimen holder and a second drive for moving the head and specimen holder toward and away from the drive plate. The head has a sleeve that is larger than the specimen holder. A cover is disposed over the bowl and has an opening larger than the sleeve so that the sleeve fits through the opening when the specimen holder is moved toward the rotatable drive plate. The grinding wheel is mountable to the plate in a single radial orientation only. A dressing system is operably connected to a controller to monitor the current of the drive plate motor and/or the head first drive actuates the dressing system based upon the current drawn by the drive plate motor and/or the head first drive motor falling below a predetermined value.

A sample grinder includes a base having a bowl and a rotatable drive plate to operably support a grinding wheel. A head is configured to support a specimen holder and has a first drive for rotational drive of the specimen holder and a second drive for moving the head and specimen holder toward and away from the drive plate. The head has a sleeve that is larger than the specimen holder. A cover is disposed over the bowl and has an opening larger than the sleeve so that the sleeve fits through the opening when the specimen holder is moved toward the rotatable drive plate. The grinding wheel is mountable to the plate in a single radial orientation only. A dressing system is operably connected to a controller to monitor the current of the drive plate motor and/or the head first drive actuates the dressing system based upon the current drawn by the drive plate motor and/or the head first drive motor falling below a predetermined value.

A drum sander having a fin for deflecting airflow around the drum and directing dust and debris to a dust collecting outlet. The fin includes a first section at a first angle and a second section at a second angle that directs air movement generated by the operating drum toward the dust collecting outlet. The free edge of the fin is shaped to wrap partially around the drum in two helical inclined planes. A tool free adjustment of parallelism may be provided. The workpieces are pulled through the sander rather than being pushed through. Lightweight materials reduce stress on the assembly. Heat is dissipated by the configuration and material of the drum.