A circular saw includes a blade guard and a saw blade at least partially enclosed within the blade guard. The saw blade has an outer diameter that is greater than 6 inches. The circular saw further includes a motor housing coupled to the blade guard, a brushless electric motor supported within the motor housing, and a battery pack for providing power to the brushless electric motor.

A circular saw includes a blade guard and a saw blade at least partially enclosed within the blade guard. The saw blade has an outer diameter that is greater than 6 inches. The circular saw further includes a motor housing coupled to the blade guard, a brushless electric motor supported within the motor housing, and a battery pack for providing power to the brushless electric motor.

A cut-off saw includes a housing, a motor supported within the housing, the motor having an output shaft operable at maximum speed greater than 10,000 revolutions per minute, and a battery configured to power the motor. The battery has an output voltage greater than 40 volts. The cut-off saw also includes a drive pulley coupled to the output shaft, a driven pulley connected to the drive pulley by a synchronous belt, and a cutting wheel coupled to the driven pulley. The cutting wheel has a diameter greater than 9 inches.

A cut-off saw includes a housing, a motor supported within the housing, the motor having an output shaft operable at maximum speed greater than 10,000 revolutions per minute, and a battery configured to power the motor. The battery has an output voltage greater than 40 volts. The cut-off saw also includes a drive pulley coupled to the output shaft, a driven pulley connected to the drive pulley by a synchronous belt, and a cutting wheel coupled to the driven pulley. The cutting wheel has a diameter greater than 9 inches.

An electric powered work machine according to one aspect of to the present disclosure includes a motor. The electric powered work machine includes a first line connecting a positive electrode of a battery to the motor. The electric powered work machine includes a second line connecting a negative electrode of the battery to the motor. The electric powered work machine includes a third line connecting the first line to the second line. The electric powered work machine includes a first capacitor disposed on the third line. The electric powered work machine includes a rectifier disposed on the third line. The rectifier limits or inhibits an electric current flowing from the second line to the first line through the third line. The electric powered work machine includes a first circuit connected to the third line. The first circuit has impedance that is other than zero, and bypasses the rectifier.

A cutting tool 10 comprises a housing 30, and a handle 50 connected to the housing 30. The handle 50 comprises: a grip part 51; a first connection part 52 extending from one end of the grip part 51 toward a front side and fixed to a main body housing 32 of the housing 30; and a second connection part 53 extending from the other end of the grip part 51 toward the front side and fixed to the main body housing 32. Thus, a loop structure S is formed by the housing 30 and the handle 50. Then, a battery pack 100 to be attached to a battery attachment and detachment part 42 of a motor housing 40 is disposed in the loop structure S.

A cutting tool 10 comprises a housing 30, and a handle 50 connected to the housing 30. The handle 50 comprises: a grip part 51; a first connection part 52 extending from one end of the grip part 51 toward a front side and fixed to a main body housing 32 of the housing 30; and a second connection part 53 extending from the other end of the grip part 51 toward the front side and fixed to the main body housing 32. Thus, a loop structure S is formed by the housing 30 and the handle 50. Then, a battery pack 100 to be attached to a battery attachment and detachment part 42 of a motor housing 40 is disposed in the loop structure S.

The present invention relates to a portable power tool (1) arranged for driving a rotatable cutting tool (2). The power tool (1) comprises a motor (5) and a transmission part (4) that is arranged to transfer power from the motor (5) to a tool holder (10), and comprises a first arm part (11; 11′) and a second arm part (12; 12′). The first arm part (11; 11′) comprises a first belt pulley (13) and the second arm part comprises a second belt pulley (14), the arm parts (11, 12; 11′, 12′) being slidably connected to each other. The belt pulleys (13, 14) are spaced apart by a certain distance (d-i, d2). The transmission part (4) further comprises a tensioning device (20) with a rod (21), a pre-tensioned resilient device (22), a linkage arrangement (25) and a rotatable part (26). The rotatable part (26) is rotatable between a first, released, state where the belt pulleys (13, 14) are spaced apart by a first distance (d-i), and a second, tightened, state where the belt pulleys (13,14) are spaced apart by a second distance (d2) that exceeds the first distance (d-i), the resilient device (22) being more compressed in the second state than in the first state.

The present invention relates to a portable power tool (1) arranged for driving a rotatable cutting tool (2). The power tool (1) comprises a motor (5) and a transmission part (4) that is arranged to transfer power from the motor (5) to a tool holder (10), and comprises a first arm part (11; 11′) and a second arm part (12; 12′). The first arm part (11; 11′) comprises a first belt pulley (13) and the second arm part comprises a second belt pulley (14), the arm parts (11, 12; 11′, 12′) being slidably connected to each other. The belt pulleys (13, 14) are spaced apart by a certain distance (d-i, d2). The transmission part (4) further comprises a tensioning device (20) with a rod (21), a pre-tensioned resilient device (22), a linkage arrangement (25) and a rotatable part (26). The rotatable part (26) is rotatable between a first, released, state where the belt pulleys (13, 14) are spaced apart by a first distance (d-i), and a second, tightened, state where the belt pulleys (13,14) are spaced apart by a second distance (d2) that exceeds the first distance (d-i), the resilient device (22) being more compressed in the second state than in the first state.

Track saws with self-adjusting rib-guide assemblies and methods of operating self-adjusting rib-guide assemblies of track saws are disclosed herein. The track saws include a motor, an arbor, and a base plate. The base plate defines an arbor-facing side and an arbor-opposed side. The base plate includes a rib-receiving channel and a self-adjusting rib-guide assembly. The self-adjusting rib-guide assembly at least partially defines the rib-receiving channel and is configured to automatically accommodate a range of raised rib transverse widths. The methods include positioning a raised elongate rib of the track within a rib-receiving channel of a base plate of the track saw. During the positioning, the methods also include establishing a contact force between the raised elongate rib and the self-adjusting rib-guide assembly. Responsive to the contact force, the methods further include moving at least a portion of the self-adjusting rib-guide assembly relative to a remainder of the track saw.