cope of application Knorr-Bremse drum brakes and slack adjusters are used in various applications on axles of commercial vehicles providing the service and parking brake function. Knorr-Bremse Drum Brake Knorr-Bremse Drum Brake Knorr-Bremse develops, manufactures and markets S-Cam drum brakes and slack adjusters. Together with pneumatic brake actuators and brake drums they represent a foundation brake system