A sliding table type circular sawing machine includes a housing having one side assembled with a travelling mechanism and its interior provided with a first fixed seat, a second fixed seat and a third fixed seat spaced apart. A power mechanism is received in the housing and a circular saw blade protrudes out of the topside of the housing. The power mechanism is respectively connected with the second fixed seat and the circular saw blade so that a short distance can be maintained between the extreme and of the power mechanism and the circular saw blade. Thus, cooperating with the travelling mechanism that is able to quickly position a work piece, the sliding table type circular sawing machine of this invention is able to carry out successive sawing operation with quickness, with less labor and with simplicity, thus enhancing convenience of the sliding table type circular sawing machine.

A lubrication system for a saw may include a lubricator that is mechanically linked to a traveling arm of a saw, such as an up-cut saw. Movement of the saw blade through a first path may result automatically in movement of the lubricator through a second path transverse to the first path. This coupled movement may result in a relatively consistent distance between the lubricator and the periphery of the saw blade, especially as compared with a stationary lubricator.

In one embodiment, a table saw assembly includes a motor assembly, an electrically conductive belt operably connected to the motor assembly, an arbor shaft operably connected to the belt, a drop arm assembly rotatably supporting the arbor shaft, and a first pulley rotatably supporting the belt, the first pulley including an inner bore and an outer surface, the first pulley configured to electrically isolate the inner bore from the outer surface.

A lubrication system for a saw may include a lubricator that is mechanically linked to a traveling arm of a saw, such as an up-cut saw. Movement of the saw blade through a first path may result automatically in movement of the lubricator through a second path transverse to the first path. This coupled movement may result in a relatively consistent distance between the lubricator and the periphery of the saw blade, especially as compared with a stationary lubricator.

A duplex saw, including a machine head assembly of which a top portion is mounted with a cutting working platform, a base, a rotating disk, and a machine head rotating seat positioned between the machine head assembly and the rotating disk and hinged with the machine head assembly and the rotating disk. The machine head assembly includes a motor, a machine frame, a gear box body, a transmission mechanism and a saw blade. The motor is fixed on the machine frame. The transmission mechanism is provided in the gear box body and constitutes a gear box assembly. A gear shaft of the motor drives the transmission mechanism. The gear box assembly can be rotated about the gear shaft of the motor. The blade is fixed on an output shaft of the transmission mechanism, the output shaft and the gear shaft of the motor are parallel to each other.

A lubrication system for a saw may include a lubricator that is mechanically linked to a traveling arm of a saw, such as an up-cut saw. Movement of the saw blade through a first path may result automatically in movement of the lubricator through a second path transverse to the first path. This coupled movement may result in a relatively consistent distance between the lubricator and the periphery of the saw blade, especially as compared with a stationary lubricator.

A method for operating an object detection system in a saw produces profiles for materials used in work pieces. The method includes operating a motor in the saw to move an implement and cut a work piece formed from a predetermined material, recording, a sensing signal produced in the object detection system during contact between the work piece and the implement, generating a detection profile for the material of the work piece based on the recorded sensing signal, storing, the detection profile in a memory in the saw, and operating the saw and the object detection system using the detection profile to distinguish between contact of the implement with a work piece formed from the predetermined material and contact of the implement with a portion of a body of an operator.

The present invention discloses a duplex saw, comprising a machine head assembly of which a top portion is mounted with a cutting working platform, a base, a rotating disk, and a machine head rotating seat positioned between the machine head assembly and the rotating disk and hinged with the machine head assembly and the rotating disk respectively, wherein the machine head assembly comprises a motor, a machine frame, a gear box body, a transmission mechanism and a saw blade, the motor is fixed on the machine frame, the transmission mechanism is provided in the gear box body and constitutes a gear box assembly, a gear shaft of the motor drives the transmission mechanism to be rotated, the gear box assembly can be rotated about the gear shaft of the motor, the saw blade is fixed on an output shaft of the transmission mechanism, the output shaft and the gear shaft of the motor are parallel to each other. With this structure, the present invention has the advantages of simple and reasonable structure, flexible and easy operation of function conversion, safe and reliable use, large cutting capacity, high cutting precision and good dust exhaust effect.

An apparatus for fixing a saw blade and a knife plate of a saw grinding machine includes a driving device including an axis; and a fixture plate having a first end and a second end. The fixture plate includes a connective hole coupled to the driving device, and a coupled portion defined at the first end thereof. The saw blade is pivotally connected to the axis of the driving device, with the saw blade and the fixture plate moved with respect to the driving device simultaneously. The knife plate is coupled to the coupled portion of the fixture plate and includes a blocked side formed on a side thereof, with a vertical distance between the blocked side and the saw blade maintained to be fixed.

A power tool includes a swing arm movable along a swing arm path, an actuating assembly configured to transfer a force to the swing arm, a control system configured to control the actuating assembly to transfer a force to the swing arm, and a detection system configured to detect the operability of the actuating assembly.