This is the first time I am commenting on someone else' comment. John Wendt made some excellent suggestions. I, too, have planed a lot of board feet and his suggestions (except wetting the wood) are what I have been doing for years. The only other suggestion is that you wax or lubricate the table often.  This, too, puts less strain on the machine and does a better job of planing. I use good quality car wax but there are other products available. I am going to try the trick of wetting hardwoods. It makes sense. I have a jointer and many other woodworking tools with blades that need to be sharpened. If I had my way there would be a federal law requiring tool manufacturers to make machines with the same blade setup as this Delta planer. I have wasted a lot of time installing and aligning blades and it is such sweet relief to just pop the blades in this tool and move on to woodworking. A final thing about this Delta planer. I have had it 16 years and it won't wear out. I have replaced the rollers once. It is a great tool and Delta does a good job producing very sharp blades that are easy to install.