A force-limiting and damping device has a body, a tapping element, a shock-absorbing element, and a limiting module. The body has a connecting segment and a holding segment. The tapping element is connected to the body to move relative to the connecting segment and has a mounting segment, a tapping segment, and a fixing segment. The mounting segment is movably connected to the connecting segment. The tapping segment is disposed on an end of the mounting segment below the connecting segment. The fixing segment is connected to the mounting segment and abuts the connecting segment. The shock-absorbing element is mounted on the mounting segment and abuts the connecting segment and the tapping segment. The limiting module is mounted between the body and the tapping element and has a force-limiting element mounted between the mounting segment and the connecting segment to provide a force-limiting reminder effect and a damping effect.

An adapter for a power tool including a housing, a tool-side connector, and a battery-side connector in electrical communication with each other. The tool-side connector is configured to couple to a power tool, and the battery-side connector is configured to couple to a battery pack. The adapter also includes a communication interface configured to couple with an external device, and a controller. The controller is configured to determine a state of the power tool, operate in a data transmission mode when the power tool is in the idle state, operate in a pass-through mode when the power tool is in the active state, and switch between the data transmission mode and the pass-through mode based on the state of the power tool.

In a hand-held power tool with a drive unit comprising at least one drive motor and a transmission coupled to the drive motor for driving a working tool, wherein the transmission can be shifted between at least two different gear ratios, a communication interface is provided for communication with a guide unit operable by a user and designed to receive gearshift instructions from the guide unit for shifting the transmission between the two different gear ratios according to the specific use.

A power tool communication system including an external device including a first controller configured to transmit, via wireless communication to a power tool, configuration data including a work light duration parameter value and a work light brightness parameter value. The power tool includes a housing, a brushless direct current (DC) motor, a trigger, a work light, a wireless communication circuit configured to wirelessly communicate with the external device to receive the configuration data, and a second controller configured to control a work light duration of the work light based on the work light duration parameter value, and control a work light brightness of the work light based on the work light brightness parameter value.

A device for striking a tool shank with a controlled force includes a tip configured to contact the shank, a plunger configured to be retracted a pullback distance from the tip and to exert a force on the tip proportional to the pullback distance when released, and a control mechanism configured to control the pullback distance. A method of reducing run-out in a machine tool comprises placing the tool in a tool holder, measuring the run-out using an indicator, identifying a high spot, manipulating the control mechanism of the striking device to select the force based on the shank diameter, and striking the shank on the high spot using the striking device.

An adapter for a power tool includes a housing, a tool-side connector, and a battery-side connector in electrical communication with each other. The tool-side connector is configured to couple to a power tool, and the battery-side connector is configured to couple to a battery pack. The adapter also includes a communication interface configured to couple with an external device, and a controller. The controller is configured to determine a state of the power tool, operate in a data transmission mode when the power tool is in the idle state, operate in a pass-through mode when the power tool is in the active state, and switch between the data transmission mode and the pass-through mode based on the state of the power tool.

An adapter for a power tool including a housing, a tool-side connector, and a battery-side connector in electrical communication with each other. The tool-side connector is configured to couple to a power tool, and the battery-side connector is configured to couple to a battery pack. The adapter also includes a communication interface configured to couple with an external device, and a controller. The controller is configured to determine a state of the power tool, operate in a data transmission mode when the power tool is in the idle state, operate in a pass-through mode when the power tool is in the active state, and switch between the data transmission mode and the pass-through mode based on the state of the power tool.

A prior art powered wrist pin knocker is imported with a new plunger that prevents wobbling. The new plunger responds to a return vacuum pressure. The improved plunger is symmetrical along a longitudinal axis. New embodiments include a new side mount valve head to reduce length, a remote air controller and a variable length cylinder for the cannon. The new valve head is a simplified valve head assembly that adapts to an end of the cannon mount or a side mount or a remote mount. Another embodiment provides a stand for a surface mount application. This embodiment can have an extended piston for loosening tail bearings down a long channel. A manual return embodiment can use a rod to manually return the plunger to the proximal end for another firing cycle.

The present invention discloses an angle-adjustable crowbar that comprises a crowbar body and a crowbar head. The crowbar head includes a first hinge base and a second hinge base in a spaced manner, and a head of the crowbar body is rotatably mounted between the first hinge base and the second hinge base through an angle adjustment mechanism. The angle adjustment mechanism comprises a limit shaft penetrating through the first hinge base, the crowbar body and the second hinge base, a first tooth portion, a polygonal limit portion and a second tooth portion are sequentially disposed on an outer wall of the limit shaft in an axial direction. The angle-adjustable crowbar overcomes the defects that the limit strength of existing crowbars is weak, the tooth portion is unlikely to be damaged, and the crowbar head cannot be replaced.

A rotary hammer includes a motor and a spindle coupled to the motor for receiving torque from the motor. The spindle has an adjustable rotation speed. A reciprocation mechanism is operable to create a variable pressure air spring within the spindle and includes a piston configured to reciprocate within the spindle in response to receiving torque from the motor. The piston has an adjustable reciprocation frequency. A striker is selectively reciprocable within the spindle in response to reciprocation of the piston. A first transmission is transfers torque from the motor to the spindle and a second transmission is transfers torque from the motor to the reciprocation mechanism. The reciprocation frequency of the piston is adjustable independent of the rotation speed of the spindle. The rotation speed of the spindle is adjustable independent of the reciprocation frequency of the piston. At least one of the transmissions is a multi-speed transmission.