Rotary Dampers
FDN-47-R

The flat disc brake for one direction of rotation

Continuous Rotation
Damping torque 17.70 +/- 2.66 in-lbs

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.

CAD Drawings

Product-Downloads

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FDN-47-R
Continuous Rotation

Dimensions

FDN-47-R
A2.56 inch
B2.20 inch
C0.24 inch
D0.18 inch
R0.18 inch
E1.85 inch
F1.68 inch
G0.06 inch
H0.40 inch

Technical Data

Damping torque 17.70 +/- 2.66 in-lbs

Damping direction right

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 inch

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.

General information

Application Examples

Rotary Dampers - FDN
For ergonomic handling, modern cooker hoods can be driven by a motor into an up position and then down again. When driven downwards, an AC load can result in a total loss through current being fed back into the voltage source. One of the tasks of...

Application Areas

  • Handling modules
  • Linear slides
  • Automatic machinery
  • Conveyor equipment
  • Absorption control
Precision hydraulic feed controls of the product family VC are used in automotive and industrial applications as well as in mechanical engineering and the electronics industry.
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