The KE 120.24-55.00 NHK DES is a self-braking powerful industrial drive with emergency hand crank (emergency chain hoist is available on request) that has been specially developed for driving a heavy unbalanced roller door by means of a chain wheel transmission. This drive is supplied as standard with an interchangeable thru axle (Ø: 55.00mm) and angled mounting feet. A console with clamping option is optionally available. Please note: an external roll-off protection is required!