A floor grinder (100), comprising at least one motor (110, 120) arranged to rotatably drive one or more abrasive grinding tool holders (130), and a control unit (140) arranged to monitor an operating characteristic of the floor grinder, wherein the control unit is arranged to compare the monitored operating characteristic to a pre-determined set of operating characteristics indicative of a tool glazing condition, and to trigger an action in case the monitored operating characteristic is indicative of a tool glazing condition, wherein the control unit is arranged to monitor the operating characteristic of the floor grinder using a machine learning technique and a glazing model configured using a plurality of examples of floor grinders which have experienced various degrees of glazing.

A pole sander is provided including an elongate body including a passageway for passage of air, an electric motor, and a sanding head attached via a pivot mechanism to a first end of the elongate body. The sanding head includes a hood including a plate and a sidewall to form a chamber, an output spindle projecting from the hood and rotatably driven by the electric motor, and a tubular passage including a first end forming an opening and a second end coupled to an aperture formed through the plate. A flexible pipe is disposed between the passageway at the first end of the elongate body and the opening of the tubular passage to fluidly connect the passageway to the chamber. The tubular passage is oriented at least partially around a portion of the output spindle in a turning direction of the output spindle and extending angularly from the plate.

A concrete surface processing machine (100) for processing a concrete surface, wherein the machine comprises means for self-locomotion and a control unit (110) arranged to control the means for self-locomotion, wherein the machine comprises one or more surface quality sensors connected to the control unit (110) and arranged to determine a local surface quality of the concrete surface, and wherein the control unit (110) is arranged to control a self-locomotion of the machine to determine a plurality of local surface quality values associated with respective different locations on the concrete surface.

A material collection device for a hand-held power tool includes a material collection container for collecting material removed during operation of the hand-held power tool. At least one opening of the material collection container is for feeding the material into the material collection container and is arranged in an opening plane. At least one mounting unit is for mounting the material collection container on the hand-held power tool. The at least one mounting unit includes a channel element for connection to an ejection port of the hand-held power tool. A channel longitudinal axis of the channel element is arranged transversely to the opening plane of the material collection container in at least one section plane running perpendicularly to the opening plane.

An apparatus for abrading a surface is provided. The apparatus includes: a framework with a motor housed therein; a chassis housing a drivetrain, the drivetrain including a drive pulley operative connected to the motor, a plurality of tool assembly pulleys, a belt operatively connecting the drive pulley and the plurality of tool assembly pulleys; a plurality of tool assemblies operatively connected to the drive pulley and the plurality of tool assembly pulleys, each tool assembly including: a tool holder, a tool plate comprising a tool segment with an abrading surface, wherein the tool holder and tool plate are detachably connected by a plurality of equidistantly spaced pins, wherein the number of pins is a multiple of three.

A dust collection device for use with a power tool includes a housing, an air inlet pipe, a cyclone pipe, an air duct pipe, and a ventilation pipe. The air inlet pipe is configured to guide an airflow to enter the dust collection device along a first straight line. The cyclone pipe extends along the second straight line. The cyclone pipe has a first end for air intake and a second end for dust discharge. The ventilation pipe is arranged at the first end and communicated with the cyclone pipe and is configured to guide the airflow after the airflow is subjected to dust separation performed by the cyclone pipe out of the housing. The second straight line along which the cyclone pipe extends intersects the first straight line to form an angle greater than or equal to 25 and less than or equal to 90.

A sander has a motor, an output shaft, a pad, a dust collecting fan arranged on the upper side relative to the pad, a motor cooling fan that is arranged on the upper side relative to the dust collecting fan, a housing and a cover. The housing has at least one air hole formed through the housing in a direction crossing an axis of the output shaft. The cover is arranged apart from the air hole outside the housing and covers the air hole.

In an embodiment, a system includes a tool that includes an exhaust port and a vacuum. The vacuum also includes an exhaust intake port configured to couple to the exhaust port of the tool. The exhaust intake port may be configured to receive exhaust from the exhaust port. The vacuum includes a vacuum intake port, a vacuum exhaust port opposed to the vacuum intake port, and a mixing chamber between the vacuum intake port and the vacuum exhaust port. The vacuum intake port, the vacuum exhaust port, and the mixing chamber may all be on a same centerline.

The present disclosure provides for a skate sharpening system comprising an operative unit and a base, the operative unit comprising a central body, the central body comprising a skate receiving slot, a skate clamp being positioned adjacent to the skate receiving slot such that a skate can be secured within the skate receiving slot for a sharpening operation, the operative unit further comprising a grinding unit, the grinding unit being configured to translate along a length of the slot such that the grinding unit can conduct the sharpening operation on the skate that is secured within the skate receiving slot, the operative unit being positioned over at least a portion of the base, the base comprising a swarf-receiving cavity, the operative unit and the base being pivotably connected.

A guard for a rotatable wheel of a power tool is disclosed. The guard comprises a shroud which is configured to partially enclose the wheel and a port disposed at a circumferential position on the shroud, via which debris generated by the wheel during use can exit the shroud. The shroud comprises a radii of curvature which increases between a first angular position and a second angular position, relative to a rotational axis of the wheel, in a direction comprising a rotational direction of the wheel.