In the $$ Millions-of-Dollars a day mining industry, heavy equipment downtime is the equivalent of throwing wads of cash down the drain. So Australian inventor Mark Prentice came up with a concept where changing unseen but critical slew bearings on heavy shovels cost a fraction of time and money compared to traditional methods. Mark's Maxi Jax™ system allows engineers to swap out a slew bearing in days instead of weeks, saving the company mine operator tens of thousands of dollars.