Power tools such as cutting saws with rotary powered blades are described. Also described are various accessories for tools used with cylindrical workpieces such as pipes are described. The accessories include a clamp and saw joint assembly, various quick connection assemblies between a saw and a clamping system, a plunge guide assembly, a latch plate assembly, an interlock switch, a blade guard system, and a chip management system or chip deflector. Also described are related methods of use.

Blade guards for table saws are disclosed. The blade guards can be used in a configuration where the guard holds a work piece against a work surface. This may be thought of as blade guards with hold-down capability. The blade guards also include splitters and anti-kickback assemblies. The anti-kickback assemblies include anti-kickback pawls that can be in an operable configuration or a disabled configuration.

Blade guards for table saws are disclosed. The blade guards can be used in a configuration where the guard holds a work piece against a work surface. This may be thought of as blade guards with hold-down capability. The blade guards also include splitters and anti-kickback assemblies. The anti-kickback assemblies include anti-kickback pawls that can be in an operable configuration or a disabled configuration.

A power tool with a rotatable tool designed as a saw blade or a milling cutter, including a sensor device for detecting a mechanical quantity, the mechanical quantity having a force, an acceleration, a velocity, a deflection, a deformation and/or a mechanical stress, and the mechanical quantity being dependent on a force emanating from the tool, and a control device communicatively coupled to the sensor device, which control device is adapted to recognize a kickback event based on the detected mechanical quantity, where the control device is adapted to selectively determine a first recognition function or a second recognition function different from the first recognition function based on a function determination information, and to perform the recognition of the kickback event based on the detected mechanical quantity using the determined recognition function.

A power tool, including a support structure, a pivot bearing arranged on the support structure, a shaft mounted on the support structure via the pivot bearing, a rotatable tool coupled to the shaft, in particular a saw blade, milling cutter or grinding wheel, a strain gauge arrangement for detecting a mechanical quantity which depends on a force emanating from the tool, and a control device which is adapted to recognize an event and/or a state of the power tool according to the detected mechanical quantity. The strain gauge arrangement is arranged on a stationary structure section coupled in a force-transmitting manner to the pivot bearing and is not arranged on the pivot bearing.

A miter saw and a workpiece support are provided. The workpiece support has a circular disc-shaped turntable penetrated by a saw blade slot serving as a passage for the saw blade lowered into the working position, a holder on one side for fastening the saw unit, and a radial arm which extends the turntable and the saw blade slot in the longitudinal direction of the slot radially outwards on a side opposite the holder. A radial arm connection is provided, on which the radial arm is detachably and co-rotatably attached to the turntable, or on which a radially outer radial arm outer portion of the radial arm is detachably and co-rotatably attached to a radially inner radial arm inner portion of the radial arm formed integrally with the turntable. The miter saw has blade that can be moved transversely and lowered from a position above the workpiece support.

A miter saw and a workpiece support are provided. The workpiece support has a circular disc-shaped turntable penetrated by a saw blade slot serving as a passage for the saw blade lowered into the working position, a holder on one side for fastening the saw unit, and a radial arm which extends the turntable and the saw blade slot in the longitudinal direction of the slot radially outwards on a side opposite the holder. A radial arm connection is provided, on which the radial arm is detachably and co-rotatably attached to the turntable, or on which a radially outer radial arm outer portion of the radial arm is detachably and co-rotatably attached to a radially inner radial arm inner portion of the radial arm formed integrally with the turntable. The miter saw has blade that can be moved transversely and lowered from a position above the workpiece support.

A holder assembly for a circular saw tool includes a blade having a bore. The blade is mountable to a free end of a rotatable shaft or of the tool through the bore. The blade is further adapted to be held in a pressing manner between an inner flange and an outer flange on the shaft. The holder assembly is comprised of at least one depression formed on a circumferential surface of the free end of the shaft, and at least one clutch member (or dogs) paired and mounted about the at least one depression, and located between the bore of the blade and the shaft. The holder assembly provides improved gripping while safety or emergency braking.

A holder assembly for a circular saw tool includes a blade having a bore. The blade is mountable to a free end of a rotatable shaft or of the tool through the bore. The blade is further adapted to be held in a pressing manner between an inner flange and an outer flange on the shaft. The holder assembly is comprised of at least one depression formed on a circumferential surface of the free end of the shaft, and at least one clutch member (or dogs) paired and mounted about the at least one depression, and located between the bore of the blade and the shaft. The holder assembly provides improved gripping while safety or emergency braking.

Blade guards for table saws are disclosed. The blade guards can be used in a configuration where the guard holds a work piece against a work surface. This may be thought of as blade guards with hold-down capability. The blade guards also include splitters and anti-kickback assemblies. The anti-kickback assemblies include anti-kickback pawls that can be in an operable configuration or a disabled configuration.