A power miter saw is provided with a base including positioning apertures; a table rotatably mounted on the base and including an arm projecting forward; a saw blade and motor mechanism configured to rotate a circular saw blade thereof; a pivotal positioning seat interconnecting two linear guide mechanisms and a support seat at a rear end of the base; a connecting seat interconnecting the linear guide mechanisms to the saw blade and motor mechanism; a locking device; and a positioning device. Knob rotation and button pressing may adjust a rotational position of the table.

A miter saw and a workpiece support are provided. The workpiece support has a circular disc-shaped turntable penetrated by a saw blade slot serving as a passage for the saw blade lowered into the working position, a holder on one side for fastening the saw unit, and a radial arm which extends the turntable and the saw blade slot in the longitudinal direction of the slot radially outwards on a side opposite the holder. A radial arm connection is provided, on which the radial arm is detachably and co-rotatably attached to the turntable, or on which a radially outer radial arm outer portion of the radial arm is detachably and co-rotatably attached to a radially inner radial arm inner portion of the radial arm formed integrally with the turntable. The miter saw has blade that can be moved transversely and lowered from a position above the workpiece support.

An apparatus includes a table assembly, a bevel post, a bevel pin, a spring, a locking arm, and a lever. The table assembly includes a table portion with a work surface and a hub portion with a first clamping surface. The bevel post includes a second clamping surface. The bevel pin pivotally connects the bevel post to the hub portion. The spring is configured to bias a movement of the bevel pin. The locking arm is configured to (i) disengage the spring such that the bevel pin releases the table assembly from the bevel post and (ii) engage the spring such that the bevel pin moves the table assembly towards the bevel post. The lever is movable between an unlocked position to provide an unclamped state and a locked position to provide a clamped state with respect to the first and second clamping surfaces.

A positioning device for a miter saw includes a working table, an elastic member, and a lever member. The elastic member has a movable portion adapted to be adjacent to a scale disc of the miter saw, and a protruding portion. The lever member is disposed in the working table, and has a linking portion connected to the movable portion, and a handle portion movable to convert the elastic member from a locking state for engaging the protruding portion with one of notches in a scale disc of the miter saw so that the working table is non-rotatable, to a releasing state for moving the movable portion away from the scale disc so that, the protruding portion is disengaged from the one of the notches to permit rotation of the working table.

A saw machine worktable positioning mechanism includes a pivot shaft, an operating member and a first positioning unit so arranged that operating the operating member can drive the first positioning unit to move a positioning member of the first positioning unit relative to the base of the saw machine in one of two reversed directions to lock the worktable of the saw machine to the base or to unlock the worktable from the base.

A miter saw includes a base, a worktable pivotally mounted to the base, a fence mounted at the worktable, an operating handle connected to the worktable, and two opposing supporting units respectively mounted to two opposite sides of the base. Each supporting unit includes a fixed panel and a movable panel pivoted to the fixed panel and biasable between an extended position where the operating handle is stoppable by the fixed panel upon operation to rotate the worktable and a first included angle is defined between a cutting slot and a fence of the worktable and a received position where the operating handle is stoppable by the movable panel upon operation to rotate the worktable and a second included angle larger than the first included angle is defined between the cutting slot and the fence of the worktable. Thus, the miter saw achieves the effect of increasing the miter angle.

A bevel angle lock and detent system for a miter saw includes a first locking unit fixed relative to the turntable and a second locking unit coupled to a bevel arm of the miter saw. An actuator is moveable between a first position and a second position to move the second locking unit relative to the first locking unit. In the first position, a brake member of the second locking unit is engaged with an arcuate surface of the first locking unit to lock a saw unit relative to a turntable. In the second position, the brake member is disengaged from the arcuate surface, thereby permitting pivoting movement of the saw unit, and a detent member of the second locking unit is engageable a detent aperture of the first locking unit to locate the saw unit relative to the turntable at one predetermined bevel angle.

A miter saw includes a base, a turntable rotatable in relation to the base and including a work piece support surface, a support assembly attached to the turntable, and a saw assembly attached to the support assembly and configured to cut a work piece supported on the turntable. A fence assembly includes an elongate fence body that extends along a first axis. The elongate fence body is supported by the base and positioned over the turntable. The fence body has a first connecting structure, and a fence insert defining an elongate work piece abutment surface and having a second connecting structure. The fence assembly is positionable in a first configuration and a second configuration. In the first configuration, the second connecting structure cooperates with the first connecting structure to secure the fence insert at a first position in relation to the fence body. When the fence assembly is positioned in the second configuration, the second connecting structure cooperates with the first connecting structure to secure the fence insert at a second position in relation to the fence body. A second axis intersects the first axis in a perpendicular manner. When the fence insert is secured at the first position, the elongate work piece abutment surface is positioned to intersect the second axis at a first point. When the fence insert is secured at the second position, the elongate work piece abutment surface is positioned to intersect the second axis at a second point, and the first point is offset from the second point along said second axis.

Various embodiments of tools with integrated measurement devices are described. An apparatus may include a tool to be applied to a workpiece, an integrated measurement device in a feed path of the tool, and a controller. The integrated measurement device may generate signals indicative of rotation of a roller in a feed path of a workpiece. The controller may generate, based on the signal, a distance measurement of the workpiece. The distance measurement may indicate a distance between an end of the workpiece and a location of the workpiece to which the tool is to be applied.

A saw machine worktable positioning mechanism includes a pivot shaft, an operating member and a first positioning unit so arranged that operating the operating member can drive the first positioning unit to move a positioning member of the first positioning unit relative to the base of the saw machine in one of two reversed directions to lock the worktable of the saw machine to the base or to unlock the worktable from the base.