The hand chain wheel of the theatre hand chain hoist is connected to the main shaft of the equipment via threads. When the hand chain wheel rotates clockwise, it moves inward along the thread path of the main shaft (toward the brake side). As the hand chain wheel continues to move, its end face gradually presses against the internal friction disc, ratchet (annular component with ratchet teeth) and brake seat, bringing the three into tight contact and forming an integrated unit, preparing for subsequent power transmission and safety braking.
This step is the key prerequisite for achieving "stop on release". The compression degree of the friction disc in the theatre hand chain hoist directly affects the braking effect. The friction discs used in theatre-specific hand chain hoists are usually made of special high-temperature resistant and wear-resistant materials to ensure stable performance even after long-term and frequent operation.
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