Abstract: Provided is an ergonomic cutting device for cutting casts and other rigid objects comprising an oscillating cutting blade driven by a motor, a handle, and a vacuum system. The present cutting device is designed such that the offset positioning of the motor enables the weight of the motor to help manipulate and make more efficient the device. The vacuum system cools the device and draws dust produced by the cutting blade through the device without contacting the dust with the motor or other mechanical components. The motor is designed to initially engage in an idle mode when the device is turned on, then automatically sense when a load is placed on the cutting blade and, at that point, boost to a cutting mode. The motor may also be manually placed in a higher powered turbo mode. The device also includes a dynamic braking system which enables the device to stop oscillation of the blade faster than previous device.