How Does a Circular Saw Work?
Circular saws come in a variety of power packages. Some saws plug into the wall. Other circular saws are battery-operated. Even larger circular saws are powered by a small gasoline engine. Regardless of the power source, they all cut material using a circular blade. Direct Drive The most common type of circular saw uses a direct drive to the electric motor. In these types of saws, the blade is connected to the end of the motor shaft. Whether the blade hole is the high-torque diamond hole or the universal round hole, they all attach directly to the spinning motor shaft. Double Gear Drive Some circular saws employ a double round gear to increase the speed of the blade through a lower-rpm motor. The two gears are inter-meshed; one is attached to the electric motor and the other to the blade shaft. The motor gear is larger in size or has more teeth. The blade gear will have fewer teeth on it. When the motor turns, the blade shaft will spin faster than the motor, depending on the ratio. The
