A
rubber bellow with vulcanized wire belt is clamped airtight
between a glass fiber reinforced polyamide piston and
a cover plate of the same material in the air springs
of series RB-SH. It is additionally provided with a support
cover made of steel and accessory base plate, simultaneously
ensuring horizontal stability and providing a defined
final stop. The load capacity of an air spring of type
SRB-SH is between 1.8 and 9 kN depending on the version,
its natural frequency ranges from 1.8 to 2.0 Hz.