The KE 40.24-40.00 NHK DES is a self-locking, powerful industrial drive with emergency hand crank (emergency chain hoist is available on request) that has been specially developed for driving an unbalanced roller door by means of a chain wheel transmission. This drive is supplied as standard with an interchangeable thru axle (Ø: 40.00 mm) and angled mounting feet. A console with clamping option is optionally available. Please note: an external roll-off protection is required!