Patent ID: 8161859

Claim:
A miter saw comprising: a base portion for supporting a workpiece; a support member supported by the base portion; and a cutting portion having a pivotal shaft, the cutting portion being pivotably supported by the support member about the pivotal shaft, the cutting portion having a circular saw blade to be pivotably moved to cut the workpiece; wherein the support member comprises a first slide support portion provided at a top end thereof, and a pair of pipes including a first pipe and a second pipe supported slidably by the first slide support portion to be movable in a direction perpendicular to the pivotal shaft, the pair of the first pipe and the second pipe pivotably supporting the cutting portion; wherein the pair of the first pipe and the second pipe each have a longitudinal axis spaced from and parallel to each other, the longitudinal axes of the pair of the first pipe and the second pipe are positioned so as to define a virtual plane which at least extends between the spaced longitudinal axes of the pair of the first pipe and the second pipe in parallel to a pivotal direction of the circular saw blade; and wherein the first slide support portion comprises: a first through hole and a second through hole formed in an axial direction of the first and second pipes, each of the first and second through holes having an inner diameter which is greater than an outer diameter of each of the first pipe and the second pipe, respectively; a third through hole opening into the first through hole and extending in a direction perpendicular to the first through hole; a first engagement member threadably engaged in the third through hole and configured to press the first pipe in an extending direction of the virtual plane; a first slide member provided in the first through hole to contact the first pipe between an inner surface of the first through hole and an outer surface of the first pipe; a second slide member provided in the second through hole to contact the second pipe between an inner surface of the second through hole and an outer surface of the second pipe; wherein an area in a longitudinal direction of the first pipe in which the first slide member is positioned is defined as a first area; wherein another area in a longitudinal direction of the second pipe in which the second slide member is positioned is defined as a second area, a length of the first area is formed shorter than a length of the second area; and wherein the first engagement member is configured to be engaged with the first pipe at a position in proximity to the first area and in a longitudinal direction in the second area, thereby rendering a pressing direction of the first engagement member to become parallel to a side surface of the circular saw blade and in the virtual plane, regardless of an inclination angle of the support member.