PTFE Bearing Pads/Teflon Bearing Pads/Plain Elastomeric Bearings
PTFE bearing pad, also called Teflon bearing pads, is an important material in bridge construction. The dimpled PTFE sheet bonded to the laminated bearing pad for structure friction coefficient reduction and displacement capacity improvement. It provides a sliding surface for expansion accommodation, the elasticity of the bearing pad is high enough to suit the rotation of beam end, and also the shear deformation is efficient to cope with the horizontal of the superstructure. Here are round and rectangular two main shapes of PTFE bearing pad introduced to you.
Structure
The Teflon bearing pad is composed of natural rubber or chloroprene rubber and Teflon plate.The natural rubber or chloroprene rubber and reinforced steel plates are vulcanized to form the standard laminated bearing pad. Then bond the dimpled Teflon plate onto pad and form the PTFE bearing pad.
Details：
- Materials: neoprene, natural rubber or SBR with PTFE top surface.
- Standard: BS EN 1337-2
- Thickness of PTFE: 1.5 mm to 3 mm or others as your request.
- Thickness: 1/8” to 30” or custom thickness.
- Width: 36” to 48” or custom widths.
- Shapes: rectangular
Installation
- The Teflon laminated bearing pad should be horizontal installed. The PTFE board can not be placed on the bridge pier.
- The PTFE bearing pad is commonly used assorted with steel plate, including top plate, stainless steel plate and bottom plate.
- Silicone grease should be evenly distributed between Teflon plate and stainless steel plate.
- Ensure right installation direction according to the direction guide on the stop plate.
- Dust cover should be placed after installation.
Feature
- Allow movements bigger than shear capability in plain surface.
- PTFE sliding surface with lubricants to reduce the friction coefficient.
- With dimples on PTFE for contain lubricant to ease the sliding movements.
- Excellent buffering and shock isolation.
- Withstand vertical load and suit to rotations of beam ends.
- In accordance with European standard EN 1337-2 or other international standards.
- Available in various shapes such as rectangular or round.
Applications
- It is suitable for large span, multi-span continuous beam and simply supported beam and other large displacement bridges.
- It can also be used as the sliding plate in continuous beam pushing construction and T beam transverse sliding.
Specifications of PTFE Slide Bearing
Top Sliding Plate – 2.5mm thick Reinforced PTFE / Virgin PTFE bonded to a 3mm thick carbon steel plate / stainless steel plate.
Bottom Sliding Plate – 2.5mm thick Reinforced PTFE / Virgin PTFE bonded to a 3mm thick carbon steel plate / stainless steel plate.
Method of Installation – Tack welding, full welding, bolting, mortar embedment.
Load Capacity – Reinforced PTFE: 18 MPa (184 kg/cm2), Virgin PTFE: 7 MPa (71 kg/cm2).
- Low Coefficient of Friction – Lower than lubricated metals or any other self-lubricating solid, the coefficient of friction of the bearing surface remains constant even under the worst conditions.
- Chemical Resistance – Resistant to almost all chemicals, solvents and fuels.
- Weather Resistance – Completely unaffected by outdoor exposure, the surface does not wet and does not absorb water.
- Thermal Stability – -250°C to +250°C (-450°F to 450°F) continuous operating temperature range. For temperatures outside this range, alternative bonding systems can be used.
- Low and Uniform Wear – PTFE-based plain bearings have extremely low wear rates and are typically not subject to design limitations.
- Electrical and Thermal Insulation – Electrical and thermal insulation is automatically provided; this is valuable in preventing galvanic corrosion and heat loss.
- Wear Resistance – PTFE allows small foreign particles to be embedded without long-term damage to friction performance and bearing life.
- Fatigue Resistance – Fatigue failure will not occur with PTFE-based plain bearings.
- Maintenance-free Bearings – PTFE is inherently self-lubricating, and dirt particles are absorbed into the material. Only simple protection is required to prevent the ingress of large amounts of dirt.
- Simplicity and Flexibility of Design – Simple design and ease of fabrication and mounting enhance cost-effectiveness.
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We aim to cut costs for our customers while keeping the highest quality.
As a result, our prices are very competitive. To get a quote, please submit an online inquiry. We will respond without delay.
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Application: Building or Bridge.
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Specification and model:For vibration isolation or displacement prevention.
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Specifications:Select each parameter.
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Drawings:Provide product drawings.
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Design Drawings: We can design drawings according to your requirements.
Packing: in pallet
Single package size: 100×100×100cm
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Hengshui Aohong Engineering Materials Co., Ltd.
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