TUB GRINDING RENTAL A grinder is a heavy piece of portable machinery designed to do just one thing — efficiently and effectively remove and recycle green waste. Our grinder services are the perfect solution to any of your company’s large-scale grinding needs. Our tub grinder gives us the capacity to grind any amount of wood and branches – very fast. Since the Morbark 1300 Tub Grinder is completely mobile, we’ll bring this awesome machine to you. Within 30 minutes of arriving at your job site, we’ll begin to turn your site’s wood and branches into wood chips. We’ll remove the chips from the site as well! This process is fast, simple and economical.