ISL - Isolated Systems Limited

Industrial Noise Vibration &
Thermal Management Solutions




Rubber Cap, Single Open Spring Mount, Unrestrained


Single Spring Rubber Cap “NSM” & “NSM-B” Type:

  • Designed to provide both low and high frequency isolation from vibration and shock.
  • Helical Spring Coil encapsulated in Neoprene Caps, to provide further increased high frequency isolation.
  • Springs designed to work at low stress giving long working life.
  • Available in Five colour coded load ranges.
  • Built-in, manual levelling facility.
  • Choice of fixing methods including:
  • M12 top fixing plus free-standing Neoprene Cap version (NSM)
  • M12 top fixing plus Baseplate equipped version (NSM-B).
  • No maintenance required.
  • May be used free-standing or bolted down.


Typical Applications:

  • Inertia Bases
  • Axial Fans
  • Centrifugal Fans
  • Blowers
  • Compressors
  • Pumps
  • Refrigeration Units
  • Small diesel & Motor Generator Sets


Open Spring “NSM” & “NSM-B” Mount, Performance Overview:

No. of Springs Colour Code Load (Max) Optimum Deflection
1 Blue 62.5Kg 20mm
1 Red 154.5Kg 20mm
1 Black 242Kg 20mm
1 Yellow 272Kg 20mm
1 Green 381.5Kg 20mm