The introduction of ceramic handle land of spring
the introduction of ceramic handle place spring
floor spring is a kind of hydraulic door closers, but its compression spring device is worm gear instead of gear and rack. Because worm gear can be forward and reverse rotation, so the spring can be used for two-way open door, the door closers, can only be used for one-way open the door. Lower part of floor spring are the key technologies of the main shaft bearing seat, which decide the level of bearing on the spring.
this is the introduction of ceramic handle land of spring