The Balance Engineering Class PRT Driveshaft Balancer achieves balance correction under the supervision of our Computerized Balancing Instrument ('CBI'), usually by the manual resistance welding of pre-cut balance weights. However, our driveshaft balancers can also be equipped for automatic balance weight welding. With automatic welding, the weights are made from strip stock which is automatically fed, formed and cut to a prescribed length to suit the individual balance solution. Whether welding is manual or automatic, balance weights are welded onto the two balance planes of a one-piece shaft or on up to four planes on an articulated (two- or three-piece) shaft. After balance correction, the balancer verifies the results via an audit spin, and the CBI displays those results. Because of a driveshaft's physical characteristics, driveshaft balancers are almost universally manually-loaded machines They can be optionally equipped with mechanical hoists and/or staging rests to facilitate loading.