COMPACT SPRING BRAKE ACTUATOR

The invention relates to a brake actuator (1) for a vehicle, in particular for a commercial vehicle. In particular, the brake actuator comprises a housing (17), said housing (17) having a sidewall (18), a spring brake piston (11) which is movably, in particular slidably arranged inside the housing (17), and sealing means (29) for sealing off a cavity (8) between the spring brake piston (11) and the housing (17) and guide means (31) for axially guiding the movement of the spring brake piston (11), wherein the sealing means (29) and guide means (31) are formed as separate parts and/or the sealing means (29) is more flexible than the guide means (31), in particular in a radial direction.