Abstract: A motor-driven concrete cutting saw and method in which the motor has an idler gear, a top slider gear slidably engageable and disengageable with the idler gear; and a bottom slider gear slidably engageable and disengageable with the idler gear. Both the top and bottom slider gears have two toothed disks, and the idler gear has two toothed disks, a main gap, and a third toothed disk. The toothed disks are sized to produce, when engaged with one another, multiple speeds including a neutral setting that would allow the motor to disengage from the saw blade while running.

Abstract: A motor-driven cutting saw in which the motor has the capability of operating at two or more speeds and a multi-speed gear box that may additionally include a neutral setting that would allow the motor to disengage from the saw blade while running.