A beater bar, also known as a brush roll or agitator, is a component found in some types of vacuum cleaners, particularly in upright and some canister models. The beater bar is a rotating cylindrical brush located at the base of the vacuum cleaner's cleaning head.
When the vacuum cleaner is in use and moved over a surface, the beater bar spins rapidly, agitating the carpet or other floor types. This agitation helps to dislodge dirt, dust, and debris from the fibers of the carpet or other surfaces, making it easier for the vacuum's suction to pick up the loosened particles.
Beater bars are especially effective on carpets, where the brushing action can penetrate deep into the carpet pile, lifting up embedded dirt and pet hair. However, some vacuum cleaners allow you to turn off the beater bar or adjust its height for use on hardwood floors or other sensitive surfaces to prevent potential damage.
Overall, the beater bar is an essential part of many vacuum cleaners, contributing to their effectiveness in cleaning carpets and improving the overall performance of the vacuum.