METALLIC CUSHIONS
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METALLIC CUSHIONS Natural frequency : 12 to 25 Hz DESCRIPTION Metallic cushions are made from drawn, woven stainless steel wire that is compressed into a geometric shape. The Vibrachoc range has more than 1000 standard metallic cushions of various sizes and characteristics. As metallic cushions are easy to create, custom shapes and characte-ristics can be developed and produced on request. APPLICATIONS Standard or custom metallic cushions can be used for many industrial applications because they are naturally resistant to grease, oil, water, etc and withstand temperatures from - 70°C to + 300°C. The static stiffness of the metallic cushion ensures progressive stiffening and maintains a constant natural frequency for a very wide range of loads within a small space. Their natural frequency of between 12 and 25 Hz and damping of 15 to 20% make them suitable for mounting rotating machines with a rotation speed over 2000 rpm. (1) Natural frequencies with max/min loads, see : OPERATING CHARACTERISTICS. PAULSTRA - 61 rue Marius Aufan - 92309 Levallois-Perret Cedex - France - T. +33 1 40 89 53 31 - F. +33 1 47 25 28 96 www.paulstra-industry.com

DIMENSIONS SIMPLE CYLINDRICAL SHAPE Reference For cushions with alternative dimensions and load ranges, please consult us. CYLINDRICAL SHOULDERED SHAPE Reference * : References detailed in the following pages PAULSTRA - 61 rue Marius Aufan - 92309 Levallois-Perret Cedex - France - T. +33 1 40 89 53 31 - F. +33 1 47 25 28 96 www.paulstra-industry.com

ASSEMBLY EXAMPLES Suspension of gearboxes, motors, fans, pumps, axial load only. A gap is necessary around the fixing screw. Absorbs expansion and isolates screws under dynamic load. Pipe isolation. Suspension of motors, fans, etc. Dowel Scheme showing a cushion mounting with uplift snubber. Machine mounted on cushions located on dowels.

OPERATING CHARACTERISTICS TYPICAL STIFFNESS CURVE FOR A METALLIC CUSHION LOAD 1 - Excellent resistance to oil, grease, solvents, water, dust, chemical agents. Δ2 2 - Whistands temperatures from - 70°C to + 300°C and in certain applications - 150°C to + 400°C. Δ1 : subtangent at minimum load M1. Δ2 : subtangent at maximum load M2. Δ1 = Δ2 Natural frequency of the mounting remains constant in the load zone. The elastic limit of the metallic cushion under compression is 3 to 5 times greater than the maximum static load shown in the data sheets. 3 - Highly resistant to ageing : characteristics...