Pneumatic Brake Cylinder and Disc Brake

A pneumatic brake cylinder of a vehicle brake has a brake cylinder housing, a brake piston guided axially in the brake cylinder housing with an extendable and retractable piston rod, which projects through an opening in a bottom of the brake cylinder housing, and a brake chamber which can be ventilated and exhausted. A fastening device is provided for the detachable fastening of the brake cylinder to a support structure for the brake cylinder, and includes at least one fastening bolt projecting away from the brake cylinder housing in the region of the bottom. A venting device interacts with the return spring chamber such that, in the event of a change in the volume of the return spring chamber as a result of a movement of the brake piston, air can pass out of the return spring chamber or into the return spring chamber by the venting device. The ventilation device includes the at least one fastening bolt which has at least one internal channel which opens, on the one hand, with a first mouth into the return spring chamber and, on the other hand, with a second mouth into an outer area of the brake cylinder.