Abstract: An electric grinding gun has a body, a gear reduction device, a holding cap, and an actuating device. The body has a casing, a rechargeable battery, a protective circuit board, a switch, a trigger, a motor, a cooling fin and a mounting barrel. The gear reduction device is rotatably mounted in the mounting barrel and has a seat, two planet gears and a gear ring. The seat is rotatably mounted in the mounting barrel and has a shaft hole, two gear recesses and a connecting axle. The holding cap is securely mounted around the mounting barrel to hold the gear reduction device in the mounting barrel and has an inner thread and a through hole. The actuating device is connected detachably to the seat of the gear reduction device and has a panel and an adhering layer.

Abstract: An electric caulking gun has a body, a gearbox, a caulking barrel, a pushing device, a driving assembly, an actuating assembly, a motor and a power source. The body has a mounting section and a handle section. The gearbox is mounted in the body and has a seat and a mounting sheath. The caulking barrel is connected to the gearbox. The pushing device is connected movably to the gearbox and has a rack, a linking sheet, two pushing shafts and a pushing disc. The driving assembly is mounted in the gearbox. The actuating assembly is mounted between the gearbox and the body. The motor is mounted in the body between the mounting section and the mounting sheath of the gearbox. The power source is connected detachable to the handle section of the body.

Abstract: A rechargeable motor-driven ratchet wrench having power-off protection of the present invention includes a motor, a rechargeable battery and a power-off protection device. When the loaded current of the motor exceeds a set default value of a reference circuit, the power-off protection device disconnects the power supply of the rechargeable battery, so as to stop the motor operation. With the circuit design of the power-off protection device, the ratchet wrench can be ensured to provide usage safety and also usage lifespan of the ratchet wrench can be extended.

Abstract: An electrical hand tool has a tool assembly, a battery pack and an adjusting device. The tool assembly has a body with an internal mechanism. The battery pack is adjustably connected to the body and is electrically connected to the internal mechanism. The adjusting device has an adjusting base, an adjusting post, a locking knob and a biasing member. The adjusting base is rotatably attached to the body and is attached to the battery pack in a non-rotatable manner. The adjusting post is mounted between the adjusting base and the body and has a positioning collar provided with multiple positioning notches. The locking knob is moveably attached to the adjusting base and has a locking stub held in one of the positioning notches. In such an arrangement, the battery pack that can be adjusted in position to make the hand tool convenient and versatile in use.

Abstract: An electrical hand tool has a tool assembly, a battery pack and an adjusting device. The tool assembly has a body with an internal mechanism. The battery pack is adjustably connected to the body and is electrically connected to the internal mechanism. The adjusting device has an adjusting base, an adjusting post, a locking knob and a biasing member. The adjusting base is rotatably attached to the body and is attached to the battery pack in a non-rotatable manner. The adjusting post is mounted between the adjusting base and the body and has a positioning collar provided with multiple positioning notches. The locking knob is moveably attached to the adjusting base and has a locking stub held in one of the positioning notches. In such an arrangement, the battery pack that can be adjusted in position to make the hand tool convenient and versatile in use.

Abstract: An electrical ratchet wrench has a body, a motor, a battery set, a switch, a planet gear assembly, a connecting collar, a head and a ratcheting device. The motor is received in the body and has an output shaft with a pinion. The battery set is detachably received in the body and is electrically connected to the motor. The switch is electrically connected between the motor and the battery set. The planet gear assembly is received in the body and has a rotating base, a stub, multiple planet gears and a stationary collar. The connecting collar securely holds the stationary collar in the connecting collar. The ratcheting device is received in the head for driving a fastener to rotate and has a driven shaft connected to the stub on the rotating base. Accordingly, a cordless electrical ratchet wrench is provided and is convenient in use.

Abstract: An electrical ratchet wrench has a body, a motor, a battery set, a switch, a planet gear assembly, a connecting collar, a head and a ratcheting device. The motor is received in the body and has an output shaft with a pinion. The battery set is detachably received in the body and is electrically connected to the motor. The switch is electrically connected between the motor and the battery set. The planet gear assembly is received in the body and has a rotating base, a stub, multiple planet gears and a stationary collar. The connecting collar securely holds the stationary collar in the connecting collar. The ratcheting device is received in the head for driving a fastener to rotate and has a driven shaft connected to the stub on the rotating base. Accordingly, a cordless electrical ratchet wrench is provided and is convenient in use.

Abstract: A tool housing with protective pads for an electrical tool has a housing body and two protectors. The housing body has two sides, a motor housing body and a handle housing body. The handle housing body is formed on the motor housing body. The protectors are mounted respectively on the housing body and each has a first protective pad, a second protective pad and a third protective pad. The pads are made of elastic material, can absorb shocks to prevent the housing body from damaging to improve the useful life of the electrical tool.

Abstract: A housing for a hand tool has a head, a handle and two positioning devices. The head is composed of two half casings each having a first adjusting base with a recess. The handle is pivotally attached to the head and is composed of two half casings each having a second adjusting base with a recess. The positioning devices are respectively mounted between the aligning recesses of the first and second adjusting bases on the head and the handle. Each positioning device has a pressing disk, a pressed disk and a biasing member. Each disk has a guiding block and a positioning block. The guiding block is formed on the disk and has two curved guiding edges selectively abutting against one end of the positioning block on the abutting disk. With such an arrangement, the housing can be adjusted between two positions easily and conveniently.