Rotary damper FDN series

hydraulicshaftsafety

The damping direction of the flat, strong FDN rotary dampers with steel body can be either right or left rotation. They can brake directly in the pivot point. ACE rotary dampers are maintenance-free and ready-to-install. Rotary damper products are built to metric specifications. For precise measurements, please refer to the ACE rotary damper catalog or contact an application expert. TECHNICAL DATA Damping torque 2.66 in-lbs to 97.36 in-lbs Damping direction right or left Construction size Ø 1.85 in to 2.76 in Rotational speed max. 50 rpm Lifetime 50,000 cycles (1 cycle = 360° left-hand, 360° right-hand). Even after this time, the dampers still produce over approx. 80 % of their original damping moment. The service life may be significantly higher or lower, depending on the application. Operating temperature range 14 °F to 140 °F Material Outer body: Steel; Output shaft sleeve: nylon with metal freewheel Mounting In any position Information to the shaft FDN-47: Ø 0.24 +0 / -0.001 FDN-57 to FDN-70: Ø 0.39 +0 / -0.001 Hardness > HRC55, surface smoothness RZ < 1µm MOUNTING INFORMATION Turn the shaft in the opposite direction to the brake direction to avoid damaging the freewheel mount. No axial or radial forces may be induced via the shaft. SAFETY INFORMATION Do not use rotary dampers as supports. Provide an external guide or support. ON REQUEST Special accessories available on request.