4 1/2x2 Single Convoluted Type Air Rubber Bellow W01-R58-4076 Firestone Industrial Air Spring

4 1/2x2 Single Convoluted Type Air Rubber Bellow W01-R58-4076 Firestone Industrial Air Spring
 

Product Description

OEM Number/Part Number

FIRESTONE BELLOWS NUMBER: 4.5X2

FIRESTONE BELLOWS NUMBER: 41/2X2

FIRESTONE BELLOWS NUMBER: 4 1/2X2

FIRESTONE FIRESTONE NUMBER: W01R584076

FIRESTONE FIRESTONE NUMBER: W01 R58 4076

FIRESTONE FIRESTONE NUMBER: W01-R58-4076

DUNLOP NUMBER: SP1457

DUNLOP NUMBER: SP 1457

Technical Data of the 2B4.5X2 Air Spring

Natural outer diameter: 114mm
Nominal diameter: 110mm
Minimum height: 53mm

Why are Air Springs Made of Rubber?

1. High Elasticity and Flexibility
Reversible Deformability: Rubber's molecular chain structure gives it excellent elasticity, allowing it to expand rapidly after inflation and return to its original shape after deflation. It also resists fatigue after repeated deformation.

Adaptability to Complex Movements: Rubber can withstand multi-directional deformation (such as tension, compression, and shear), making it suitable for the up-and-down bouncing and lateral swinging of vehicle suspensions.

2. Excellent Airtightness
Molecular Density: Rubber's molecular structure effectively prevents gas permeation, ensuring long-term stability of the air pressure inside the air spring (especially under high pressure).

Technology Enhancement: Vulcanization or an inner lining (such as butyl rubber) can further enhance sealing.

3. Fatigue Resistance and Durability
Dynamic Load Adaptability: Rubber resists crack growth during frequent compression/rebound cycles (for example, natural rubber can withstand flexion cycles exceeding one million times).

Environmental Stability: Through formulation adjustments (such as the addition of antioxidants and antiozonants), it can resist UV rays, oil stains, and temperature fluctuations (-40°C to 80°C).

4. Damping Properties
Vibration and Noise Reduction: The viscoelasticity of rubber absorbs vibration energy (the damping coefficient is typically 0.05-0.25), reducing mechanical shock and minimizing vehicle jolting.

5. Lightweight Advantages
Low Density: Rubber density is approximately 1.1-1.2 g/cm³, significantly lower than metal (7.8 g/cm³ for steel), reducing suspension system weight and improving energy efficiency.

6. Design Flexibility
Easy Molding: Molding allows for complex structures such as bellows and sleeves (such as single- or multi-convoluted bellows) to accommodate various installation spaces.

Material Composites: It can be reinforced with cord layers (polyester or nylon) to withstand higher pressures (for example, commercial vehicle air springs can reach pressures of 8-10 bar).

Limitations Compared to Other Materials: Metals (such as steel): They lack elastic deformation and are heavy.

Plastics (such as polyurethane): Poor air tightness and fatigue resistance, and prone to brittleness at low temperatures.

Firestone Rubber Bellow Air Spring

The Drawing of the 41/2X2