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Supersoft Urethane Bushings / SB 2520-1210 Series


      Low creep rate compared to other polymers. (Rubber, neoprene, silicone etc.)
      Superior damping coefficient over a very wide temperature range.
      Can absorb shock efficiently for millions of cycles.
      Temperature Ranges: -15C to 98C.

The super soft urethane bushes are made of a soft visco-elastic polymer. Visco-elastic means that a material exhibits properties of both liquids (viscous solutions) and solids (elastic materials).

The super soft urethane bushes have the properties of a thermoset, polyether-based, polyurethane material. The material combines shock absorption, good memory, vibration isolation and vibration damping characteristics. In addition it is a very effective acoustic damper and absorber. While many materials exhibit one of these characteristics, it combines all of them in a stable material with a long fatigue life.

Using two bushings together or a bushing and washer(s), you can create a floating bolt that isolates the unit from any metal-to-metal contact.

Different shores allow for different spring rates. Load ratings assume a 10% - 20% deflection of the material. This deflection is achieved by a combination of system weight and torquing of the connecting bolts.

Do not over torque the bolts as this defeats the intended vibration isolation and shortens bushing life. Use a high-quality (thread deforming) lock nut or doubled jam nuts to prevent vibration from loosening the bolt.

Unlike other products, the super soft urethane bushes may be used in tension connections.

Part Number A (mm) B (mm) C (mm) D (mm) E (mm) Datasheet
SB1210/1 12.7 - 4.8 5.7 - Download
SB1210/2 12.7 5.7 4.8 3.15 10.0 Download
SB2520/1 25.4 - 9.6 11.4 - Download
SB2520/2 25.4 11.4 9.6 6.3 20.0 Download

To order: Specify part number, shore, quantity & colour. Colour black is standard.
Other colours and dimensions are available to special order.

Material Properties


All specifications shown herein are typical values and are not guaranteed.  It is recommended to test in application for suitability.



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