An electric circular saw includes a saw blade, a motor, a housing, a bottom plate, a worm gear assembly and a power supply device. The saw blade is configured to rotate about a first axis. The motor has a motor shaft for driving the saw blade to rotate. The housing has an accommodating portion for accommodating the motor. The worm gear assembly realizes power transmission between the motor and the saw blade. The power supply device includes at least one battery pack to power the motor. The ratio of the nominal voltage of one battery pack to the weight of the electric circular saw is greater than or equal to 6 V/Kg and less than or equal to 12 V/Kg.

A power operated scribe saw including a head assembly affixed to a handle assembly. The head assembly includes a frame body, a drive train and a cutting blade. The drive train includes a worm driveshaft and worm rotating about a longitudinal axis of rotation and a blade driveshaft and worm gear rotating about a transverse axis of rotation, the cutting blade rotating with the blade driveshaft. The frame body includes a longitudinal throughbore and a transversely extending recess extending into a first side wall, the throughbore including a seating surface. A worm driveshaft support assembly supports the worm driveshaft for rotation and includes a first bearing engaging the worm drive shaft between the distal end of the worm driveshaft and the worm and a second bearing on the seating surface of the throughbore and engaging the worm drive shaft between the proximal end of the driveshaft and the worm.

A control unit controls a tree stem processing tool pivotably mounted to an articulated boom in such a way that orientation of the tool is changed when the tool is controllably rotated about a rotation axis that is oriented substantially vertically. the articulated boom being rotatably connected to a mobile work machine, The control unit is adapted to automatically apply a control mode in the control unit in which control mode a power-driven operation is controlled according to a predetermined dependency in such a way that one or more operating parameters influencing the power-driven operation vary as a function of a prevailing separation or a prevailing distance determined in relation relating to a predetermined hazard direction or predetermined hazard trajectory associated with the tool.

A disk saw felling head comprising a saw housing positioned between a disk saw and harvesting and bunching cylinders so as to provide visibility window laterally between a first mounting post and a second mounting post promoting visibility of a full width of a tree toward a cutting zone.

A circular saw includes a housing assembly and a drive motor assembly coupled to the housing assembly. An output member is driven by the drive motor assembly. A shoe is adjustably mounted to the housing assembly. A circular saw blade has a diameter of about 7.3 inches. The shoe can be adjusted to provide a depth of cut that is greater than or equal to about 3.0 inches.

The first rotation lock mechanism 31 is configured such that a screw force produced by a rotation operation of an operation member 33 is transmitted to a lock member 42 via a transmission bracket 36 and a transmission rod 40. Through minimizing the length of the screw shaft 35, the transmission bracket 36, and the transmission rod 40, the position of a lock member which a screw shaft 35 is brought into contact with and the screw force is directly applied to is arranged to be closer to a user in comparison with conventional prior art. As a result, transmission loss of the screw force can be reduced, enhancing accuracy and consistency for the fixing force with respect to the table can be improved.

A miter saw includes a base assembly, a bevel arm pivotably coupled to the base assembly, and a saw unit pivotably coupled to the bevel arm about a horizontal chop axis. The saw unit includes a saw blade rotatable about a blade axis and a motor having an output shaft inclined at an oblique included angle relative to the blade axis. The miter saw also includes a guide rail coupling the saw unit to the base assembly and a battery selectively electrically connectable with the motor to provide power to the motor. The bevel arm and saw unit are pivotable relative to the base assembly, from an orientation in which the saw blade is substantially vertical, in both a first direction about the bevel axis by a bevel angle of at least about 45 degrees and an opposite, second direction by a bevel angle of at least about 45 degrees.

A disk saw felling head comprising a saw housing positioned between a disk saw and harvesting and bunching cylinders so as to provide visibility window laterally between a first mounting post and a second mounting post promoting visibility of a full width of a tree toward a cutting zone.

A power miter saw includes an activation assembly including a lever, a spring loaded drive rod passing through an underside of the table, a curved link pivotably secured to the drive rod, a pivotal member pivotably secured to the curved link and secured to the lever, a driven rod, a clamping member in an edge of a positioning seat, and an axle through the positioning seat and having an end pivotably disposed in a support seat; a graduated member including apertures; and a locking device including a hollow member having two side slots, a spring loaded cam member, and a transverse bar passing through the positioning seat, the slots, and the cam member; a spring loaded pin secured to a forward end of the hollow member; and two lever members secured to two ends of the transverse bar respectively. A pivotal movement of the lever unfastens a positioning seat.

A power miter saw includes an activation assembly including a lever, a spring loaded drive rod passing through an underside of the table, a curved link pivotably secured to the drive rod, a pivotal member pivotably secured to the curved link and secured to the lever, a driven rod, a clamping member in an edge of a positioning seat, and an axle through the positioning seat and having an end pivotably disposed in a support seat; a graduated member including apertures; and a locking device including a hollow member having two side slots, a spring loaded cam member, and a transverse bar passing through the positioning seat, the slots, and the cam member; a spring loaded pin secured to a forward end of the hollow member; and two lever members secured to two ends of the transverse bar respectively. A pivotal movement of the lever unfastens a positioning seat.