Abstract: A micro adjusting device for lifting and lowering the worktable of a planer includes a base, a movable worktable positioned at one side of the base and having two fix holes in two side plates, and a micro-adjusting device positioned at one side of a connect rod of a connect rod device. The micro-adjusting device has a fix shaft pivotally connected to an upper portion. The fix shaft passes through the two fix holes of the movable worktable, enabling the worktable move up and down on the inclined surface of the base by means of the micro-adjusting device.

Abstract: A two surface planer includes a lower base with a rear stationary table and a front sloped member sloping up to an intermediate portion, an adjusting base with an upper horizontal surface, and an activating rod pivot-ally connected with the adjusting base and the sloped member to let the adjusting base lifted up and lowered down on the sloped member. A lower cutter head is further provided in the intermediate portion of the lower base, having an lateral upper opening for a cutter of a lower cutter shaft rotatably contained in the lower cutter head, with the cutter protruding up out of the opening for a preset distance. When the adjusting base is lowered below the cutter by operation of the activating rod rotated by a hand wheel, the cutter can plane wood workpiece, and then two surfaces (the upper and the lower) of wood can be planed synchronously.