VMC Group LD Series Large Deflection Mid-Frequency Isolators provide both shock and vibration protection for a variety of applications. These isolators can attenuate a 15.0 g, 11-millisecond shock to 10.0 g; and a 30.0 g, 11-millisecond shock to 16.0 g. The LD Series Isolators are ideal for use in applications where vibration and shock are a concern.

Two different elastomeric element types are available in The LD Series. The standard elastomer that offers an operating temperature of -20⁰F to +180⁰F provides effective isolation in most applications. The optional polybutadiene version is used in situations where operating temperatures may drop as low as -65⁰F. Both versions are excellent when high amplitude vibration inputs are expected or large shock deflections are needed. Both versions also resist oils, ozone and most solvents - providing optimum resilience in difficult conditions.

No special tools are required for installation. The central isolators are not inherently failsafe. These isolated systems do require suitable means of restraint.

Features & Benefits

  • Static load range from 7 - 40 lbs. offers several solutions for low load applications
  • Large deflection capability can dramatically reduce abrupt shock impacts as high as 30.0 g's
  • Two different elastomer unit options meet operating temperature requirements for even the most extreme conditions
  • Elastomeric isolators resist oils, ozone and most solvents - providing optimum resilience in challenging conditions
  • Central cores accept common screws - offering simple installation


  • Passenger car applications
  • Electrical cabinets
  • Electronic equipment
  • Air conditioning components
  • Locomotive components
  • Engines
  • Tracks




The engineers we employ hold the highest industry-recognized credentials in structural analysis, elastomer development and system dynamics.


We are the first ISO accredited PCA ISO-17065, third-party certification body for special seismic certification of non-structural building components and their mounting configurations by the ICC’s International Accreditation Service.

Test & Measurement

We are the only ISO 17025:2005 Accredited Seismic Simulation Test Laboratory with a triaxial shake table owned and operated by California licensed Structural engineers.

Testing Services Update
DCL now offers Nuclear Qualification and Testing services.

In partnership with Greenberry Industrial, we now offer testing services that meet the requirements of ASME NQA-1.

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