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.

A saw machine system includes a modular saw machine and a plurality of saw machine implements, wherein the modular saw machine is selectively coupled to the saw machine implements to transform one type of saw machine to another saw machine. By selectively coupling the modular saw machine to the saw machine implement, the saw machine system becomes one of a portable hand-held saw machine, a fixed cutting-head saw machine, and a cutting-head guide-by-rail saw machine.

A multiple function saw includes a base including an arm selectively movable with respect to the base, the arm being selectively rotatable about a first arm axis at a first end of the arm, towards and away from a substantially planar top surface of the base. A saw having a housing is coupled to the arm at a second end of the arm. The multiple function saw is adjustable to operate in multiple different modes including a first mode with the arm being selectively rotatable about the first arm axis, a second mode with the arm being constrained from rotating about the first arm axis, the arm being substantially stationary with respect to the base, wherein the saw is pivotable about a vertical axis at the second end of the arm such that a face of a saw blade is positionable to operate as a table saw, and a third mode with the saw being moveable horizontally along the base to operate as a radial saw.