Profile: Railquip, Inc. deals with transportation machinery and equipment. We also offer a complete line of heavy-duty garage maintenance and lifting equipment for the truck & bus industry. The automatic rail welding machine, RQ 4006 is a multi-purpose, light machine that can be used for submerged arc and open arc welding. The RQ 2095 mechanical grinding machine features vertical spindles for grinding or cutting wheels. It can be used for grinding before and after rail welding.