A power tool includes a casing, a cutting unit, a transmission device, and a toggle switch. The casing includes a support portion. The cutting unit is used for cutting a target object and moving between a first position and a second position relative to the support portion. The toggle switch includes at least a third position and a fourth position. When the toggle switch is at the third position, the cutting unit performs a first motion: the cutting unit moves from the second position to the first position. When the toggle switch is at the fourth position, the cutting unit performs a second motion: the cutting unit moves from the first position to the second position. A speed at which the cutting unit performs the second motion is greater than a speed at which the cutting unit performs the first motion.

An example shearing head includes a first member and a second member being rotatable about a pin. The first member has a shearing surface forming a substantially right angle with a first lateral surface of the first member. The second member has a shearing surface forming a substantially right angle with a second lateral surface of the second member. The second member includes a first distal surface and a second distal surface forming a substantially right angle. The first distal surface and the second distal surface are substantially perpendicular to the second lateral surface. The second member includes a third lateral surface opposing the second lateral surface and a retainer is attached to the second member. A first surface of the retainer contacts the first distal surface, a second surface of the retainer contacts the second distal surface, and the third lateral surface contacts a third surface of the retainer.

A power tool includes a cutting unit configured to perform a cutting action, and a cutting action input unit configured to turn the cutting action on and off. The cutting action input unit is configured to, when the cutting action input unit is turned on, cause the cutting unit to move in a direction of an end position of the cutting action, and when the cutting action input unit is turned off, cause the cutting unit to stop moving in a case where the cutting action has not ended at a time when the cutting action input unit is turned off, and move in a direction of a standby position at which the cutting unit was located prior to a start of the cutting action in a case where the cutting action has ended at the time when the cutting action input unit is turned off.

An example shearing head includes a first member and a second member being rotatable about a pin. The first member has a shearing surface forming a substantially right angle with a first lateral surface of the first member. The second member has a shearing surface forming a substantially right angle with a second lateral surface of the second member. The second member includes a first distal surface and a second distal surface forming a substantially right angle. The first distal surface and the second distal surface are substantially perpendicular to the second lateral surface. The second member includes a third lateral surface opposing the second lateral surface and a retainer is attached to the second member. A first surface of the retainer contacts the first distal surface, a second surface of the retainer contacts the second distal surface, and the third lateral surface contacts a third surface of the retainer.

A power shear tool includes a housing portion, a motor positioned within the housing portion, and a tool head portion extending from the housing portion and including a blade rotatable relative to the tool head portion. The power shear tool includes a workpiece support member positioned proximate the tool head portion. The workpiece support member includes a top surface and a bottom surface opposite the top surface, side surfaces extending between the top and the bottom surfaces, a first channel defined in the top surface and extending from at least one of the side surfaces, and a second channel defined in the top surface. The second channel intersects the first channel and extends transverse to the first channel.

A power shear tool includes a housing portion, a motor positioned within the housing portion, and a tool head portion extending from the housing portion and including a blade rotatable relative to the tool head portion. The power shear tool includes a workpiece support member positioned proximate the tool head portion. The workpiece support member includes a top surface and a bottom surface opposite the top surface, side surfaces extending between the top and the bottom surfaces, a first channel defined in the top surface and extending from at least one of the side surfaces, and a second channel defined in the top surface. The second channel intersects the first channel and extends transverse to the first channel.

A cable cutter and crimper is provided comprising an anvil having an anvil cutting edge. A blade is pivotally coupled to the anvil and includes a blade cutting edge. A clevis is coupled to the anvil and includes arms extending on opposite sides of an actuator screw. A pivot nut is threadably coupled to the actuator screw and pivotally coupled to the blade. Rotation of the actuator screw in a first rotational direction causes the pivot nut to translate along the actuator screw in a first translation direction, resulting in the blade cutting edge moving away from the anvil cutting edge. Rotation of the actuator screw in a second rotational direction causes the pivot nut to translate along the actuator screw in a second translation direction, resulting in the blade pivoting relative to the anvil to move the blade cutting edge toward the anvil cutting edge.

A power tool according to the present invention includes a cutting unit that performs a cutting action, and a cutting action input unit for turning the cutting action on and off. The cutting action input unit, when turned on, causes the cutting unit to move in a direction of an end position of the cutting action, and when turned off, causes the cutting unit to stop moving in a case where the cutting action has not ended at a time when the cutting action input unit is turned off, and to move in a direction of a standby position prior to a start of the cutting action in a case where the cutting action has ended at the time when the cutting action input unit is turned off.

A sheet cutting and bending apparatus for cutting a wavy sheet and forming trapezoidal notches required for installation includes a base, two cutters at an end of the base, and a force applying mechanism for driving the two cutters. A knife of the cutters has no handle but just has a curved force receiving edge at the rear edge. The force applying mechanism has two rocker aims driven by a rocker rod and a force applying rod bridging between the two rocker arms for abutting a force receiving edge of the knife to produce a shear force and pushing the knife efficiently to cut two incisions at an edge of the sheet. In addition, a bending mechanism is linked with the force applying mechanism and provided for flipping a plate between the two incisions inwardly to form trapezoidal notches required for installation at the edge of the sheet.

An example shearing head includes a first member and a second member being rotatable about a pin. The first member has a shearing surface forming a substantially right angle with a first lateral surface of the first member. The second member has a shearing surface forming a substantially right angle with a second lateral surface of the second member. The second member includes a first distal surface and a second distal surface forming a substantially right angle. The first distal surface and the second distal surface are substantially perpendicular to the second lateral surface. The second member includes a third lateral surface opposing the second lateral surface and a retainer is attached to the second member. A first surface of the retainer contacts the first distal surface, a second surface of the retainer contacts the second distal surface, and the third lateral surface contacts a third surface of the retainer.