What is the difference between
Direct Drive Pumps & Belt Drive Pumps
A "Direct Drive" pump has a hollow shaft, which simply slides onto the drive shaft of a motor or engine. Direct drive pumps allow for a more compact designed pressure washer. Another advantage is that this drive system is simple, with fewer moving parts; therefore less expensive. Electric motors typically will turn a direct drive pump at 3450 RPM or 1725 RPM.
A "Belt Drive" pump has a pulley mounted to its solid shaft and is driven by one or more belts that are attached to a pulley on the motor or engine. Belts and pulleys absorb vibration, reducing pump fatigue. Because of these factors, most heavy use pressure washer applications will demand a belt drive pump.