Rainbow Rubber Industry with more than 60 years experience to offer bearing pad all over the world. There are very advanced technology, very safe production environment, professional production worker, strong sales team and other services to help you choice the suitable product. Our bearing pads have been used in many famous Projects successfully, we deserve your trust.

Characteristics:

Rainbow Elastomeric Bearing Pads a manufactured from synthetic neoprene-chloroprene rubber (CR) or natural rubber (NR) mixed with black carbon and high quality raw material to form into a rubber compound by using well proven production processes to match AASHTO M251 Specification under controlled heat and pressure. We can guarantee a long life-span without the need for maintenance.

Main Features:

Rainbow Elastomeric Bearings consist of vulcanized elastomeric blocks, Plain and reinforced by two or more steel plates. The vulcanized reinforcing layers of high-strength steel plates are fully enclosed in high –grade elastomer to ensure absolute corrosion protection and complete freedom from maintenance. The rubber used is extremely resistant to ageing and weathering influences such as ozone and UV radiation. The steel plates shall be ASTM A36/4 36M or A 570/A 570M, Grade 36 or Grade 40. All steel plates shall be debarred. The internal steel plates shall be less than 1.88mm (0.074 inch) thick. The steel plates separating the elastomeric layers will be completely bonded by vulcanization to the elastomeric layers will be completely bonded by vulcanization to the elastomeric material on all surfaces using special metal to rubber bonding adhesive. All external loads bearing steel plate(s) if present shall be factory vulcanized to the elastomeric bearings during the primary molding process.

Fields of Application:

Rainbow Elastomeric Bearings are used mainly for flyovers, bridges and buildings and can be used at temperatures of between -40°C and +50°C. Brief temperature increases up to +70°C can be withstood without problems. Rainbow Elastomeric Bearings can absorb horizontal movements in every direction and rotational movements around every axis through elastic deformation, thereby allowing forces to be transferred safely from one structural component to another.

Plain Bearing:

Image 01

Plain Elastomeric Bearings are utilized when load, deflection, rotation and expansion requirements are minimal. Made of neoprene-chloroprene rubber (CR) and natural rubber (NR) , plain elastomeric bearings can be cut to size from large slabs or molded individually to size. Molded bearings are designed with either single or compound bevels.

Plain Bearing with External Steel plate:

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Two external steel plates can be vulcanized directly to elastomeric bearings during production so that the bearings can be secured to the structure by mechanical anchoring or gluing in order to reduce the risk of slipping.

1-Type PBf (Fixed in all Directions):

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These plates must be used on the top and the bottom surfaces of the bearing pads, provide the extra protection against shifting. These plates have lateral strength adequate to resist all applied loads and restrain unwanted translation. This type of Elastomeric bearing available as type PBf (fixed in all directions).

2-Type PBe (Fixed in one Direction):

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If there will be higher horizontal and vertical force that has to bear by the non-sliding elastomeric bearings, type PBe (fixed in one direction) will be used.

3-Type PBa (Free in all Direction ):

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Friction bearing designed as a free sliding bearing in longitudinal and transversal direction simultaneously. A PTFE layer is bonded to the rubber to reduce the friction coefficient with stainless steel welded to the top steel plate. Teflon (PTFE) has lowest coefficient of friction up to 0.05–0.10. A bearing which carries verti¬cal load by contact stresses between a PTFE sheet or woven fabric and its mating surface, which permits movements by sliding of the PTFE over the mating surfaces. The bottom element consists of a virgin Teflon sheet and steel substrate plate; both are vulcanized-bonded to the neoprene or natural rubber bearing. When necessary, the bearing may also be bonded to a steel base plate. The entire bottom element is vulcanized-bonded in one molding process and may include restrictor pins or guide bars. This type of Elastomeric bearing available as type PBa (free sliding).

Laminated Bearing:

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Elastomeric Bearing with internal steel plates greatly alter the bearing’s vertical/load deflection characteristics. These “laminated” bearings are custom molded to any size or shape from neoprene or natural rubber. The reinforcing steel plates vary in thickness, depending on design needs, and are sandwiched between alternating layers of elastomeric material. Most are molded from 50 or 60 durometer compounds.

Laminated Bearing with External Steel Plates:

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Two external steel plates can be vulcanized directly to elastomeric bearings during production so that the bearings can be secured to the structure by mechanical anchoring or gluing in order to reduce the risk of slipping.

1-Type LBf (Fixed in all Directions):

Image 03

These plates must be used on the top and the bottom surfaces of the bearing pads, provide the extra protection against shifting. These plates have lateral strength adequate to resist all applied loads and restrain unwanted translation. This type of Elastomeric bearing available as type LBf (fixed in all directions).

2-Type LBe (Fixed in one Direction)

Image 03

If there will be higher horizontal and vertical force that has to bear by the non-sliding elastomeric bearings, type LBe (fixed in one direction) will be used.

3-Type LBa (Free in all Direction ):

Image 03

Friction bearing designed as a free sliding bearing in longitudinal and transversal direction simultaneously. A PTFE layer is bonded to the rubber to reduce the friction coefficient with stainless steel welded to the top steel plate. Teflon (PTFE) has lowest coefficient of friction up to 0.05–0.10. A bearing which carries verti¬cal load by contact stresses between a PTFE sheet or woven fabric and its mating surface, which permits movements by sliding of the PTFE over the mating surfaces. The bottom element consists of a virgin Teflon sheet and steel substrate plate; both are vulcanized-bonded to the neoprene or natural rubber bearing. When necessary, the bearing may also be bonded to a steel base plate. The entire bottom element is vulcanized-bonded in one molding process and may include restrictor pins or guide bars. This type of Elastomeric bearing available as type LBa (free sliding).