Speed Control gas springs have been designed to reduce or eliminate blank holder bounce and is a part of the problem-solving KALLER products.

Speed Control gas springs work by slowing down the speed at which the blank holder travels just before it reaches its start position. This is achieved by damping the Speed Control’s piston rod return speed to 0.4 m/s during the last 30 mm of piston rod travel.
Blank holder bounce often occurs as a result of an excessive press stroke return speed, commonly associated with new generation of presses.
The height of the blank holder lift depends on the speed that the blank holder is traveling at when its supporting gas springs reach their fully extended positions. At this point, the inertia of the blank holder causes it to lift up from its supporting gas springs.