A lever brake that functions as a service brake is an active braking device operated by hydraulic pressure. This type of brake is hydraulically actuated and spring-opened, which means it is activated by a hydraulic mechanism, while the brake automatically opens through spring force in the event of a hydraulic failure. This design offers reliable braking performance and ensures that the brake does not unexpectedly lock in a power-off state. Lever brakes of this type are versatile and provide an effective way to control movement in various industrial and mechanical applications.