Products for railway and transport machinery
Sumitomo Electric offers electric wires that play important roles in the railway field, and air springs that are used in industrial fields.
Contact wires are used to supply electricity to moving vehicles (e.g. rolling stock, trucks, transport equipment, and cranes) via pantographs. These products are used in various fields.
Air springs for vehicles
Air springs, which are mounted between the car body and bogie (bogie and wheels), are important parts for significantly reducing the vibration transmitted from the wheels to the car body and increasing improving ride comfort of trains.
Sumimount™ industrial air springs are designed to absorb vibration by using the elasticity of air. The bellows are made from tenacious rubber, and their top and bottom are clamped using metal fittings to trap the air. These products are also utilized as actuators to operate machines by stretching and contracting the air springs.