A system includes a wheel positioned at an initial position. A back portion of the wheel is configured with a plurality of grooves to attach to a connecting apparatus. A cover is positioned adjacent to the wheel. The cover is configured to be positioned over the wheel. The cover is configured to work in conjunction with the wheel to rotate and sand one or more surfaces. The connecting apparatus receives the cover and wheel. The connecting apparatus is connected to the plurality of grooves and enables the cover and the wheel to rotate and sand the one or more surfaces.

A system includes a wheel positioned at an initial position. A back portion of the wheel is configured with a plurality of grooves to attach to a connecting apparatus. A cover is positioned adjacent to the wheel. The cover is configured to be positioned over the wheel. The cover is configured to work in conjunction with the wheel to rotate and sand one or more surfaces. The connecting apparatus receives the cover and wheel. The connecting apparatus is connected to the plurality of grooves and enables the cover and the wheel to rotate and sand the one or more surfaces.

Apparatus for sharpening a cutting tool. In some embodiments, a tool sharpener includes an abrasive medium having an abrasive surface. A stationary tool support guide provides a guide surface that supports a side of the tool during presentation of a cutting edge of the tool against the abrasive surface. A rotatable edge guide has a roller member with a curvilinearly extending outer surface. The roller member is rotatable about an edge guide roller axis to engage, via rolling contact, the cutting edge during the presentation of the cutting edge against the abrasive surface.

Apparatus for sharpening a cutting tool. In some embodiments, a tool sharpener includes an abrasive medium having an abrasive surface. A stationary tool support guide provides a guide surface that supports a side of the tool during presentation of a cutting edge of the tool against the abrasive surface. A rotatable edge guide has a roller member with a curvilinearly extending outer surface. The roller member is rotatable about an edge guide roller axis to engage, via rolling contact, the cutting edge during the presentation of the cutting edge against the abrasive surface.

A power tool is configured to permit a part for suppressing play of a battery and a filter to be replaced together in a single operation. The power tool (belt-type grinding tool) is driven by a detachably loaded battery. The power tool includes a housing having a battery loading part and an air inlet opening, and a filter component detachably attached to the housing. The filter component has a filter covering the air inlet opening and a filter securing part holding the filter and secured to the housing. The filter securing part has a frame portion surrounding the perimeter of the filter, and three mounting leg portions extending from the frame portion. The first and second mounting leg portions partially project into the battery loading part. The first and second mounting leg portions abut against the battery to suppress play of the battery with respect to the housing.

A power tool is configured to permit a part for suppressing play of a battery and a filter to be replaced together in a single operation. The power tool (belt-type grinding tool) is driven by a detachably loaded battery. The power tool includes a housing having a battery loading part and an air inlet opening, and a filter component detachably attached to the housing. The filter component has a filter covering the air inlet opening and a filter securing part holding the filter and secured to the housing. The filter securing part has a frame portion surrounding the perimeter of the filter, and three mounting leg portions extending from the frame portion. The first and second mounting leg portions partially project into the battery loading part. The first and second mounting leg portions abut against the battery to suppress play of the battery with respect to the housing.

A belt sander having a fast-lift cover structure includes a drive mechanism, a body and a cover. The drive mechanism includes a drive module, a tension arm, a sanding belt surrounding the drive module and the tension arm. The body receives the drive module. The body includes a base, an extendable support rod extended from the body and connected to the tension arm, and a cover fastening assembly disposed at the base. The cover fastening assembly includes a release and a resilient element for restoring the release to its original position. One end of a cover is pivotally connected at one side of the body, and the other end of the cover includes a fastening portion engaged with the release. Operation is easy, no hand tools are required, and the cover does not fall off.

A belt sander having a fast-lift cover structure includes a drive mechanism, a body and a cover. The drive mechanism includes a drive module, a tension arm, a sanding belt surrounding the drive module and the tension arm. The body receives the drive module. The body includes a base, an extendable support rod extended from the body and connected to the tension arm, and a cover fastening assembly disposed at the base. The cover fastening assembly includes a release and a resilient element for restoring the release to its original position. One end of a cover is pivotally connected at one side of the body, and the other end of the cover includes a fastening portion engaged with the release. Operation is easy, no hand tools are required, and the cover does not fall off.

A handle extension for a belt sander comprising a hollow member having a front side, a rear side, a first side, a second side, and a third side, wherein the front side, rear side, and first side have a cutout in a predetermined location and size and the third side has an opening in a predetermined location and a predetermined size, a handle of a predetermined length and sized to be received by the opening on the third side of the hollow attachment member, and a securing mechanism attached to at least the first side and the second side of the hollow member.

A hand-held belt sander includes a head, an arm, a retaining unit, and a positioning unit. The head includes a mounting seat surrounding an axis. The arm has a sleeve segment mounted to the mounting seat. The retaining unit has an annular groove formed in the mounting seat, and multiple protrusions disposed on the sleeve segment and engaging the annular groove. The positioning unit includes multiple engaging grooves formed in the mounting seat, and an engaging member disposed on the sleeve segment. When the engaging member engages one of the engaging grooves, the arm is positioned relative to the head at an operating position. When the engaging member is disengaged from the one of the engaging grooves, the arm is rotatable about the axis relative to the head.