Abstract: With purpose of predicting front load washer bearing lifetime in new product development, a simplified mechanical model is built up in auxiliary of front load washer bearing lifetime calculation methodology definition. The methodology exhibits trilogy of bearing lifetime as following: a) Deriving bearing load expression from simplified mechanical model; b) Calculating alternated cyclic bearing load with front load washer working condition in application of ISO 281 expression; c) Introducing Miner linear cumulative damage theory to establish the relationship between cyclic load and total equivalent dynamic load. According to the alternative cyclic load feature on front load washer, an average equivalent dynamic bearing load expression derived in combination of ISO 281 theory and Miner theory, which gives an answer of the relationship between alternated cyclic load and total load.

Key words: Front load washer machine, Bearing lifetime, Miner linear cumulative damage theory, Average equivalent load