There are many types of power tools, such as electric screwdrivers, electric sanders, electric drills, impact drills, electric hammers, electric scissors, electric planers, electric stone cutters and so on. With high vibration, high temperature rise, high impact of the work characteristics and in the wet, dust and other environments.
Household appliances including air-conditioners, washing machines, refrigerators, air purifiers, cooker hoods, hoovers, fans, etc., are usually in dusty, humid, quiet, high and low temperature working environments. The noise, sealing performance and life span of the bearings are required to be high.