POT Bearings

256 Interior the good, New York
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(+321) 567 89 0123

The purpose of a bearing is to allow controlled movement and thereby reduce the stresses involved. Movement could be thermal expansion or contraction, or movement from other sources such as seismic activity.
Pot bearings can satisfy the requirements of large load capacity in three directions, great horizontal displacement and big rotation angle. Pot bearing can be designed and manufactured according to AASHTO, EN1337 as well as BS5400 Standards.
Pot bearings are used when large vertical loads are accompanied by large horizontal movement but little rotation. Horizontal movements are taken on a PTFE slider, while the pot bearing allows rotation in any direction.
Pot bearings are designed to carry combinations of the vertical loads, horizontal loads, longitudinal and transversal movements and rotations.
These types of bearings can carry very high loads which are over 50.000 KN A completely encased natural rubber pad is positioned in a steel pot.
Under high pressure the pad behaves like a liquid.

Types of POT Bearings

➤ Fixed Type: These bearings consist of a pot / piston assembly within which an elastomeric disc is encapsulated and fitted with an anti-extrusion sealing device. These bearings enable rotation in any direction while at the structure is constrained horizontally. The function of the pot and piston parts are for fixing and securing the bearings to the bridge structure.

➤ Free sliding type: Identical in construction to the fixed bearings, these multi-directional devices are fitted with a virgin PTFE sheet in contact with an austenitic steel plate, enabling the bearing to slide in all directions.

➤ Guided Sliding type: Guided Sliding devices are identical in construction to free sliding bearings but are also fitted with one or more guides to limit the bearings movement to only one direction.

Features：Through the fluid properties of elastomeric disc constrained in the steel pot, it can support vertical load and the rotation of the upper structure, to achieve replacement through sliding between stainless steel and PTFE.

Application：The product is widely used for the simply support girder and continuous girder of highways and high-speed railways around the world.

Advantages： Simple structure, large capacity, flexible rotation, sliding friction coefficient and good cushioning properties.

When compared to normal elastomeric bearing pads, it has the following advantages:

➤ Takes larger loads where space is a constraint as compared to that of elastomeric bearing pads.

➤ It can sustain larger cycles of rotation and movement.

➤ Maintenance is economical, as the replacement is effected only for the rubber disc.

➤ Long term serviceability.

➤ Effect of atmospheric corrosion is minimal.