This video explains why relubing once a year is not enough and that relubrication is necessary to replenish grease in bearings when the current grease breaks down or deteriorates. Learn how pumping new grease into a bearing helps to flush away contamination while the old grease is pushed out, as well as how relubrication intervals can vary based on load, speed, temperature or environmental conditions.

This article is taken from http://www.machinerylubrication.com/View/29055/relubing-lubrication-myth