OEM No/Model: .5124 8222913, E39-HK
name:Gas Spring BMW 5124 8222913, E39-HK
OE:5124 8222913, E39-HK
Base on common gas spring design, develop internal grooving has a slope on the tube IDits no cutting manufacturing process---professional name is dynamic gas spring.
Piston is single-direction structure, use the variable damping function of grooving on the tube ID to release high-pressure air or hydraulic oil on piston rod extended direction. It will replace original piston-hole damping design.
Common gas spring structure use the piston-hole damping structure. It will use thehydraulic oil pass through damping hole to achieve the damping at the end of stroke, and it use diameter size of damping hole to control extended damping rate. But the design flaw is, when installation, the piston rod must be downwardor the damping function will lose.
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