To provide a cutting machine that suppresses swinging of the cutting portion when the battery pack is attached or detached, the cutting machine includes a cutting portion, a base, and a swing support mechanism. The cutting portion includes: a motor, a motor housing accommodating the motor, an output shaft configured to be rotated upon rotation of the motor, a battery pack serving as a power source of the motor, and a battery pack attaching portion including a pair of rail portions with which the battery pack is engageable, where a cutting blade is configured to be detachably attached to the output shaft. The base has a contact surface on which a workpiece is configured to be placed. The swing support mechanism is connected to the base and the cutting portion and includes a swing shaft extending in parallel to the output shaft. The swing support mechanism supporting the cutting portion such that the cutting portion is swingable about the swing shaft between a top dead center and a bottom dead center in a direction parallel to a side surface of the cutting blade. The pair of rail portions extend in a direction crossing the side surface of the cutting blade.

To provide a pipe cutting machine capable of cutting a pipe even of a large diameter efficiently in a short period of time, and achieving excellent economical efficiency and excellent durability with a simple, compact, and light-weight configuration.

A pipe cutting machine cuts a pipe 10 at a right angle to the center line of the pipe 10. The pipe cutting machine comprises: rotary blades 20, 20 in a pair, with a plane at a right angle to the center line of the pipe 10 to be cut defined as an x-y plane and the center of the pipe 10 defined as a coordinate origin, the rotary blades being arranged to face each other on both sides of a y axis in such a manner that blade edges of the rotary blades 20, 20 overlap each other in the direction of an x axis; a straightforward driving mechanism 50 that drives the rotary blades 20, 20 in a pair straightforward in opposite directions of a y-axis direction so as to make the rotary blades 20, 20 in a pair pass each other on the x axis and in the vicinity of the x axis; and a power direction conversion mechanism 46 and a power direction conversion mechanism 47 that change part of straightforward driving force in the y-axis direction to force in the x-axis direction and move the rotary blades 20, 20 in a pair outwardly to get farther from the y axis for avoiding interference between the blade edges when the rotary blades 20, 20 in a pair pass each other on the x axis and in the vicinity of the x axis.

A working machine includes: an output shaft to which a tip tool is attachable; a housing rotatably supporting the output shaft; and a protection cover attached to the housing so as to cover an outer periphery of the tip tool which is attached to the output shaft. The protection cover is configured to be displaceable between a processing position to expose a part of the outer periphery of the tip tool to thereby allow cutting of a workpiece, and a protecting position to cover the outer periphery of the tip tool more than in the processing position, and is biased by a biasing member to be displaced from the processing position to the protecting position.

A circular saw includes a worktable, a sliding unit including a mounting base mounted on the worktable and providing an accommodation slot and two sliding shafts axially slidably inserted through the mounting base at two opposite sides of the accommodation slot in a parallel manner, and a cutting unit including a saw arm pivotally connected between the two sliding shafts and providing an accommodation portion and a saw blade pivotally mounted at the saw arm. Thus, when the saw arm is in an upper limit position, the accommodation of the saw arm is partially disposed outside the accommodation slot. When the saw arm is in a lower limit position, the accommodation portion is received in the accommodation slot. Subject to the design described above, the circular saw achieves the effects of reduced overall dimension, low vibration and high cutting accuracy.

A circular saw includes a worktable, a sliding unit including a mounting base mounted on the worktable and providing an accommodation slot and two sliding shafts axially slidably inserted through the mounting base at two opposite sides of the accommodation slot in a parallel manner, and a cutting unit including a saw arm pivotally connected between the two sliding shafts and providing an accommodation portion and a saw blade pivotally mounted at the saw arm. Thus, when the saw arm is in an upper limit position, the accommodation of the saw arm is partially disposed outside the accommodation slot. When the saw arm is in a lower limit position, the accommodation portion is received in the accommodation slot. Subject to the design described above, the circular saw achieves the effects of reduced overall dimension, low vibration and high cutting accuracy.

Systems and methods for a table-mounted stand that houses a hand-held masonry cut-off saw. In some embodiments, the stand provides a fixed mount that keeps the saw stationary while the operator is allowed to feed the work piece through the saw with both hands. In some embodiments, the stand is configured to mount and un-mount the saw without the need for separate tools or time-consuming restraints. In some embodiments, the stand includes a throttle control that is activated via foot control, which allows for two-hand manipulation of the work piece being cut by the saw mounted on the stand. In some embodiments, the two-handed work-piece manipulation provided by the stand allows for precise curved and multi-angled cuts. In some embodiments, the stand is made of lightweight construction (e.g., aluminum) for ease of setup and mobilization.

Systems and methods for a table-mounted stand that houses a hand-held masonry cut-off saw. In some embodiments, the stand provides a fixed mount that keeps the saw stationary while the operator is allowed to feed the work piece through the saw with both hands. In some embodiments, the stand is configured to mount and un-mount the saw without the need for separate tools or time-consuming restraints. In some embodiments, the stand includes a throttle control that is activated via foot control, which allows for two-hand manipulation of the work piece being cut by the saw mounted on the stand. In some embodiments, the two-handed work-piece manipulation provided by the stand allows for precise curved and multi-angled cuts. In some embodiments, the stand is made of lightweight construction (e.g., aluminum) for ease of setup and mobilization.

It is an object of the invention to provide a technique for increasing the degree of freedom in designing a grip part in order to improve operability of a power tool. A representative electric vibration tool 100 is provided which mainly includes a body housing 101, an inner housing 110, a driving motor 115 and a spindle 124. A blade 145 as a tool accessory is held between the spindle 124 and a clamp shaft 127 and driven by the driving motor 115. The driving motor 115 and the spindle 124 are housed within the inner housing 110. The inner housing 110 is housed within a front region of the body housing 101. A grip part 107 is arranged behind the front region of the body housing 101.

A power tool includes a motor; an arbor attachment mechanism that includes a shaft configured to be driven by the motor about a spin axis. The arbor attachment mechanism is configured to hold a blade onto the shaft. The power tool includes a blade size limiter that is configured to prevent attachment of a blade with a radius greater than a predetermined size, and is configured to be connected to the arbor attachment mechanism independently of the attachment of the blade to the arbor attachment mechanism and such that the blade size limiter is at a distance from the spin axis of the shaft.

The invention relates to a sawing machine with a saw shaft (2) on which a saw blade (3) is mounted, characterised by torsional vibration damping with a damping mass (7) which is arranged next to the saw blade (3) on the saw shaft (2) and completely surrounds the saw shaft (2) in a cross-section, and the damping mass (7) is separated from the saw shaft (2) by a gap (11) and arranged with a clearance on the saw shaft (2), and the gap (11) between the damping mass (7) and the saw shaft (2) is filled with a fluid.