The Sitema Safety Catchers, manufactured by Sitema GmbH (Karlsruche, Germany), are clamping devices that mount around shafts to support vertical loads. They can decelerate and stop falling loadings, preventing personal injury or damage to equipment. A series of wedged clamping jaws are arranged inside the Safety Catcher housing, each with one slide lining and one brake lining. During normal function, hydraulic or pneumatic pressure is applied to the plunger, forcing it upward. Other features include:
- A safety factor ranging between 2:1 and 4:1.
- A construction that forces the condition that caused the shaft to drop be corrected before the Safety Catcher will release.
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