A method for controlling a wall saw system during creation of a separating cut in a workpiece is disclosed. The wall saw system includes a saw head, a pivotable saw arm, a first saw blade, and a larger second saw blade. The separating cut is performed in a plurality of main cuts, where the parameters of the main cuts (saw blade diameter of the saw blade used, main-cut angle) are defined before the start in a main-cut sequence. After the processing of the separating cut by the first saw blade is concluded, the controlled processing of the separating cut is interrupted by a control unit and the wall saw is moved into a parking position such that all actions of the saw-blade change (swinging out the saw arm, removing the first saw blade, installing the second saw blade, and swinging in the saw arm) can be performed.

A quick tensioning system applicable to handheld chainsaws is provided wherein, during chain re-tensioning, the chain guiding bar remains firmly anchored to the bar holder and guiding means are provided to retract the motorized driving sprocket versus said guiding bar. The system includes a guide interposed between a stationary bar holding body and a motor body. This allows a linear or a rotation relative movement between the sliding driving sprocket and the stationary guiding bar. A drive is provided by means of a screw that an operator can easily operate via a knob conveniently mounted nearby the chainsaw handle.

A quick tensioning system applicable to handheld chainsaws is provided wherein, during chain re-tensioning, the chain guiding bar remains firmly anchored to the bar holder and guiding means are provided to retract the motorized driving sprocket versus said guiding bar. The system includes a guide interposed between a stationary bar holding body and a motor body. This allows a linear or a rotation relative movement between the sliding driving sprocket and the stationary guiding bar. A drive is provided by means of a screw that an operator can easily operate via a knob conveniently mounted nearby the chainsaw handle.

A material cutting apparatus that includes a frame, a vertical support member, a cantilevered arm, and a cutting head. The frame has a first end and a second end and a track running between the first end and the second end. The vertical support member is mounted to the track and extends outwardly from the track. The vertical support member terminates at a vertical support member free end, where the vertical support member is configured to travel about the track from the first end to the second end. The vertical support member is rotatable about a vertical axis. The cantilevered arm extends outwardly from and normal to the vertical support member. The cantilevered arm terminates at a cantilever free end. The cutting head is configured to move along the cantilevered arm between the vertical support member and the free end.

A control method for the use of a core drilling system, including a core drill and a feed device for driving the core drill along a machine holding unit, including the method steps: detecting at least one first drilling parameter value during the core drilling operation; establishing the at least first drilling parameter value as a reference value; detecting at least one second drilling parameter value during the core drilling operation; comparing the at least second core drilling parameter with the reference value; and selecting a predetermined parameter setting for the core drilling system if the second drilling parameter exceeds or falls below the reference value by a predetermined corresponding threshold value. Also a feed device for driving a core drill along a machine holding unit for use of the method, a core drill for use of the method as well as a core drilling system including a core drill and a feed device for driving the core drill along a machine holding unit for use of the method.

A method for controlling a water supply system for use with a machine tool is disclosed. The water supply system includes a housing with an interface for supplying electrical energy, a water tank, a line, a pump device, a current-measuring device, a water-pressure-measuring device, and a control device. The method includes activating the pump device if the machine tool is connected to the interface and the motor current of the machine tool exceeds a predetermined threshold value, and deactivating the pump device if the machine tool is connected and the motor current undershoots a predetermined threshold value; or activating the pump device if the machine tool is not connected and the water pressure in the line undershoots a predetermined threshold value and deactivating the pump device if the machine tool is not connected and the water pressure exceeds a predetermined threshold value.

A power tool includes a housing, a saw blade for cutting a workpiece, a motor for driving the saw blade to rotate about a first axis, a circuit board for controlling the motor, a heat sink for cooling, and a base plate being formed with a flat surface for contacting with the workpiece during cutting. The housing includes a first containing portion being formed with a first container for containing the motor, a second containing portion extended along a direction substantially parallel to the flat surface from one of the two ends of the first containing portion along a direction substantially perpendicular to the first axis. The second containing portion is formed with a second container which is communicated with the first container. The circuit board and the heat sink are disposed in the second container.

A power tool includes a housing, a saw blade for cutting a workpiece, a motor for driving the saw blade to rotate about a first axis, a circuit board for controlling the motor, a heat sink for cooling, and a base plate being formed with a flat surface for contacting with the workpiece during cutting. The housing includes a first containing portion being formed with a first container for containing the motor, a second containing portion extended along a direction substantially parallel to the flat surface from one of the two ends of the first containing portion along a direction substantially perpendicular to the first axis. The second containing portion is formed with a second container which is communicated with the first container. The circuit board and the heat sink are disposed in the second container.

A wall cutting guide includes a guide member for guiding a cutting tool, the guide member having an opening therein and the opening having first and second sides; and a clamp. The clamp includes a deformable locator which can be deformed by a variable amount, a spindle, and a handle. The locator is arranged to be inserted in a hole in a wall. The spindle extends through the opening and out of the first and second sides of the opening. On the first side of the opening the handle is connected to the spindle. On the second side of the opening the locator is connected to the spindle. The handle is adjustable to control the amount by which the locator is deformed thereby to locate the locator in the hole.

A wall cutting guide includes a guide member for guiding a cutting tool, the guide member having an opening therein and the opening having first and second sides; and a clamp. The clamp includes a deformable locator which can be deformed by a variable amount, a spindle, and a handle. The locator is arranged to be inserted in a hole in a wall. The spindle extends through the opening and out of the first and second sides of the opening. On the first side of the opening the handle is connected to the spindle. On the second side of the opening the locator is connected to the spindle. The handle is adjustable to control the amount by which the locator is deformed thereby to locate the locator in the hole.