DISC bearings are uniquely defined by their Polyether-Urethane (PU) rotational disc which is placed between the upper bearing plate and the lower bearing plate. The rotational disc’s elasticity enables tilting movements of the upper bearing plate around any horizontal axis. The rotational capacity is facilitated by a “V” shaped groove along the exterior contour of the disc. A shear pin placed in the centre of the rotational disc absorbs the horizontal forces and keeps the upper and lower bearing plates in position. Depending on whether it is fixed, guided sliding or free sliding, the bearing can accommodate horizontal forces and movements (longitudinal or transverse) as well as vertical loads.
Based on the features, disc bearings are classified into 3 types:
- Be able to withstand high load
- Be suitable for both bridge and civil engineering works thanks to low height
- High durability of Polyether-Urethane disc
- Sliding materials made of PTFE as surface and stainless steel sheet as the sliding plate keep the frictional resistance low and offer the smoothly movement