This E.R. Wagner plate caster has a cast iron wheel, a flat base with holes for bolting or welding to an object, and a rigid design to allow movement in a back-and-forth motion. The load capacity of 1000 to 1200 lb. makes the caster suitable for moving utility trucks, trash containers, and production dollies. The plate caster's wheel consists of cast iron enriched with steel, which rolls with ease under heavy loads, is durable, performs well in extreme temperatures, and is resistant to wear and shock. The wheel is suitable for bearing medium to heavy loads on rough floors and environments where floor protection and noise are not concerns. The wheel has a recommended operating temperature range of -50 to 500 degrees F. The roller bearing provides a high load capacity and greater durability than a ball bearing. Plate casters are wheeled mechanisms used to support and maneuver objects such as carts, racks, and dollies. Plate casters are named for their mounting system: they have a flat plate, usually with four bolt holes, that forms the top of the caster and attaches to the object. Plate casters vary in their maneuverability. Some are rigid and only roll at a fixed angle, while other casters swivel to allow a 360-degree change in direction. Plate casters may have brakes, and swivel casters may have locks to set them to a fixed angle. Casters may have single or twin (dual) wheels made from a variety of materials. Generally, wheels with hard tread material have a higher load capacity and roll easier than soft tread wheels, which provide quieter operation and cushioning. Load capacity for plate casters is also affected by tread width and wheel diameter. Plate casters are used on furniture, carts, shelving, appliances, scrap bins, production dollies, and utility trucks for material handling applications in a variety of industries. E.R. Wagner manufactures casters, wheels, hinges, stampings, and tubular products. The company, founded in 1900, is headquartered in Milwaukee, WI.