Pot Bearing
Pot bearings are constructed by placing an elastomeric pad inside a sealed cylindrical steel pot, with a steel piston on top. Under load, the elastomer deforms elastically like a confined fluid, allowing the bearing to accommodate rotational movements. The piston surface is fitted with a PTFE (Teflon) sliding layer and lubricated to reduce friction and improve horizontal sliding capacity.
Operating Principle
When subjected to vertical loads, the elastomer inside the pot deforms elastically like a fluid, enabling:
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Uniform distribution of vertical reaction forces.
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Absorption and allowance of structural rotation through elastic deformation of the elastomer.
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In combination with the PTFE–stainless steel interface to provide horizontal sliding displacement during thermal expansion or contraction of the bridge.
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KAWAKIN BRAND (JAPAN)
Kawakin pot bearings are designed under strict Japanese standards and utilize advanced anti-corrosion solutions to extend service life in harsh environments such as coastal areas, high-humidity regions, or industrially polluted zones.
Corrosion Protection Methods
Kawakin pot bearings are protected by a premium anti-corrosion system including the proprietary K-Coat coating, hot-dip galvanizing, and a multi-layer Epoxy–Polyurethane paint system. These solutions help maintain durability and resistance to oxidation, salt attack, and chemicals, ensuring stable long-term performance under severe environmental conditions.
Arc-Sprayed Al–Mg Plasma Coating (Arc-Sprayed Al–Mg Coating)
The arc-sprayed aluminum–magnesium alloy plasma coating is a high-end corrosion protection solution that Kawakin applies to steel components of pot bearings to create a more durable protective layer than conventional paint coatings.
Principle
The Al–Mg alloy is melted by a plasma arc and then sprayed onto the steel surface at high velocity, forming a dense, uniform metallic coating with strong adhesion.
The result is a protective metallic layer that provides:
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Strong mechanical bonding with excellent adhesion.
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No peeling like epoxy paint under impact or steel deformation.
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A sacrificial anodic (“self-sacrificing”) layer that protects the steel even if the coating is scratched.
Detail Drawing
- Upper Plate (Upper plate)
- S.T.S (Stainless steel plate)
- P.T.F.E (PTFE sliding surface – Polytetrafluoroethylene)
- Piston (Piston)
- Guide Bar (Guide bar)
- Seal Ring (Dust seal ring)
- Brass Ring (Brass ring)
- Rubber Pad (Rubber pad)
- Anchor Bolt (Anchor bolt)
- Anchor Socket (Anchor socket)
- Pot (Pot body)
