
The unreinforced heavy-duty bearing for thermal separation of steel structures is shape-dependent loadable up to 30 N/mm². The bearing can be provided in different thicknesses. Compact Core Bearings are made of NBR. They are used in all fields of metal construction to provide thermal separation, such as in the installation of building facades, solar energy equipment on roofs or the connection of balconies and canopies to the main loadbearing structure.
The Calenberg Compact Core Bearing is an unreinforced heavy-duty elastomeric bearing with a smooth surface. The red-brown colour of the material clearly identifies the product.

Characteristics
Due to its high material hardness, the Compact Core Bearing – in contrast to ordinary, softer elastomeric bearings – deforms very little under load. In practice this means:
- The high stiffness of the bearing means it is not suitable for accommodating shear deformations and rotations.
- Transverse deformation is extremely low thanks to the bearing‘s excellent shape stability.
- Moments are transferred without large deformations.
- Due to its low deformation and high thermal resistivity, the bearing is particularly suitable for use as a thermal separation layer in end plate butt joints in structural steelwork.
Use and areas of application
Compact Core Bearings are used in all fields of metal construction to provide thermal separation, such as in the installation of building facades, solar energy equipment on roofs or the connection of balconies and canopies to the main loadbearing structure.
Material
Elastomeric material based on butadiene- acrylonitrile rubber, colour red-brown (common short name: NBR (nitrile rubber)
Compact Core Bearings are resistant to oil, grease and fuel; they are also resistant to abrasion and wear.
Delivery forms
Calenberg Compact Core Bearings are supplied ready-made in the shape and dimensions required for each project.
Holes, cut-outs, slots etc. can be provided to allow bolts or dowels to pass through the bearings.
Bearing thicknesses: | 5, 10, 15, 20 mm |
Maximum cut dimensions: | 1200 mm x 1200 mm |
Material hardness | 40 ± 5 [Shore-D]; t = 5, 10, 15 mm 60 ± 5 [Shore-D]; t = 20 mm |
Thermal conductivity λ | 0,2 [W/m · K] |
Temperature range | – 20 to +70°C |
Surface resistivity in accordance with DIN EN 20284 | 7.5 · 1010 Ω |
Volume resistivity in accordance with DIN IEC 93 | 2.1 · 1012 Ω cm |
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