Profile: Applied Spring Technology Ltd. specializes in providing design and manufacture of constant force and constant torque springs. We offer spring motors that give constant torque for up to 80 turns. They are used in cable retrievers and long running spring motor drives. We provide constant force extension springs giving loads from 0.1 kg to 12 kg, with extensions up to 4000 mm. They are suitable for counterbalancing sash windows, machine guards, and tensioning fire damper doors.