Is code for bearing pad?

Is code for bearing pad?

Import Data and Price of bearing pads under HS Code 8482 | Zauba.

What is an elastomeric bearing pad?

Elastomeric bearing pads are used in building and other structures like bridges to mount a road deck onto a foundation so that the road deck is able to move with respect to the foundation, within limits, without affecting the lateral or overloading the lateral loads on the foundation.

How do you determine the size of an elastomeric bearing?

The design of elastomeric bearings is based on striking a balance between the provision of sufficient stiffness to resist high compressive force and the flexibility to allow for translation and rotation movement. The cross sectional area is normally determined by the allowable pressure on the bearing support.

What are elastomeric bearings made of?

Steel Laminated Elastomeric Bearings These pads are manufactured from alternating layers of neoprene or natural rubber and steel sheets and are molded under heat and pressure (vulcanization process) into one unit. During vulcanization, the steel laminates are permanently bonded to the rubber.

What is shear rating of elastomeric bearing?

Commonly used elastomers have a shear modulus between 0.080 and 0.175 ksi and a nominal hardness between 50 and 60 on the Shore A scale. The shear modulus of the elastomer at 73° F is used as the basis for design.

What is the function of elastomeric bearing?

The purpose of the elastomeric bearings is to support a bridge or other heavy structure in a way that permits the load to shift slightly, in a horizontal direction, relative to the ground or foundation.

Which of the following is a type of elastomeric bearing?

Elastomeric bearings fall under bridge bearings, and there are a wide variety of these used for various applications. There are a lot of bridge bearings that are similar to these, such as neoprene bearings and laminated elastomeric bearings, and these are commonly used in the construction industry.

How are elastomeric bearing pads made?

Elastomeric Bearing Pad Role of the Elastomeric Bearing Pad This is typically made of a strong and pliable material such as neoprene—a type of heavy-duty industrial rubber. These pads are placed in between superstructures such as the bridge beam and substructures such as the vertical supports called piers.

How do you calculate the stiffness of an elastomeric bearing?

Lateral stiffness of elastomer bearing on abutments can be calculated easily multiplying one elastomer stiffness with the amount of elastomer (Eqn. 3.8.). Total lateral stiffness is the sum of effective linear stiffness of pier and elastomer stiffness on abutments (Eqn. 3.9).

What is PTFE bearing?

POT PTFE BEARING is a bearing which carries vertical load by compression on an elastomeric disc confined in a steel cylinder and which accommodates rotations by deformations of the disc. The elastomer under a triaxial pressure offers low resistance to deformation but high vertical stiffness.

How do elastomeric bearings work?

Without such bearings, the bridge support might crack or fracture when it moves due to ground movements or thermal expansion and contraction. Elastomeric bearing pads compress on vertical load and accommodate both horizontal rotation and horizontal shear movement.

Is PTFE and Teflon the same?

PTFE is the shortened name of the chemical polytetrafluoroethylene, and Teflon is the trade name of the same polymer. If you are looking for a highly flexible, non-stick material that is chemical, electrical and thermal resistant, look no further than PTFE.

Is PTFE good for bearings?

PTFE (Teflon) in Bearing Uses in Large Structures PTFE has an exceptionally low coefficient of friction and high self-lubricating characteristics, resistance to attack by almost any chemical, and an ability to operate under a wide temperature range.

Is PTFE an elastomer?

Fluoroelastomer (FKM) rubber is a thermoset elastomer while Polytetrafluoroethylene (PTFE) is a thermoplastic. Both are fluorinated materials comprising of carbon atoms surrounded by fluorine atoms, which gives them incredible chemical resistance.

What is Teflon pad?

A PTFE bearing pad is a slide plate made up of PTFE, 25% glass filled, material that provides a low coefficient of friction for most combinations of temperature and load. For most applications, PTFE, 25% Glass Filled, is adequate when the temperature is less than 400 degrees F. PTFE, 25% Glass Filled Slide Plates.