Solar Tracking Bearings: Reliable, Durable, and Cost-Effective

Our fully plastic, ready-to-ship solar tracking bearings are designed for high-performance and low-maintenance, providing impact resistance, low wear, and easy installation—delivered quickly to keep your projects on track.

Key Features of Our Ready-to-Ship Solar Tracking Bearings

Solar Tracker-bearings-octagonall

✅Application: Suitable for single-axis photovoltaic tracking systems driven by octagonal tubes and square tubes. The spherical and wedge assembly are more suitable for complex terrain and harsh weather conditions.

✅Self-aligning Capability: The inner hole of the spherical bearing is designed with a spherical shape, allowing the bearing to automatically adjust angular deviations within a 5° range. When there is installation error (such as parallelism deviation) between the shaft and bearing, the spherical design compensates automatically, preventing bearing jamming

✅Adaptability to Complex Terrain: In cases where misalignment occurs due to complex terrain, the spherical bearing can effectively alleviate uneven load distribution on the bearing. Traditional bearings require high installation precision, while the spherical bearing reduces installation difficulty. It can be installed without precise alignment, simply by naturally fitting the spherical design, saving more than 50% of the installation time compared to conventional bearings.

✅Self-Lubricating: Made of modified reinforced plastic material, the bearing is lightweight with a low friction coefficient. Its self-lubricating properties can save on long-term maintenance costs.

✅Corrosion Resistance: In addition to the inherent acid and alkali resistance of the plastic material, antioxidants and UV-resistant additives are incorporated, allowing the bearings to be used long-term in high-temperature, sun-exposed, cold and humid, and corrosive environments, preventing metal corrosion.

✅Low Noise: The bearing can absorb vibrational energy, reducing mechanical noise.

✅Integrated Injection Molding: Offering lower cost and higher accuracy, improving overall system efficiency.

Automatic Compensation for Installation Errors

Spherical Working Surface: The fully plastic bearing assembly features a spherical working surface, paired with a built-in spherical bearing, offering a wider range of applications in special scenarios like mountain slopes, water surfaces, etc.
Adaptive Center Alignment: In case of installation errors caused by terrain undulations, the adaptive center alignment function automatically adjusts the main shaft/tubing position, reducing rotational resistance and motor load.
Enhanced System Stability: The bearing’s design eliminates damage caused by misalignment, increasing the overall stability and safety of the solar tracking system.

Technical Specifications for Our Solar Tracking Bearings

Product Single-axis photovoltaic tracker
Service Life
≥25 years
Load Capacity
Axial 1000kg
Dimensions
Square tube: 120×120mm; Octagonal tube: 121mm, equilateral
Error Compensation
Automatic compensation angle ≤±5°
Operating Temperature
-40℃~70℃
Tolerance
Fit ±0.4, Outline ±1mm
Noise
Max 55dB (Load 700kg, 2.2rpm, 91H)
Weather Resistance
ISO 4892-3 Total Irradiation: 45Kw.h, Irradiation Time: 4000h ISO 6252 Environmental Cracking Resistance: ≥1000H
Product Weight
1.2kg

Note:
The materials specified for our Ready-to-Ship Bearings (such as PA6 for housings and POM for bushings) are recommended based on general performance and durability in typical solar tracker environments. However, we understand that each project may have unique operational and environmental requirements. Our team is ready to collaborate with you to select the most suitable materials tailored to your specific needs, ensuring optimal performance, cost-efficiency, and long-term reliability in your unique solar tracker applications.

Material Properties for Housings & Busings

Housing Material:

PA6 + 30% Fiber Glass + Lubricant + Anti-oxidant + UV Resistant Agent 

Mechanical Nominal Value Unit Test Method
Tensile Strength (23°C)
160
MPa
ISO 527-2
Tensile Strain (Break, 23°C)
2.5
%
ISO 527-2
Flexural Modulus (23°C)
9000
MPa
ISO 178
Flexural Stress (23°C)
230
MPa
ISO 178
Coefficient of Friction – vs. Metal
0.20
Suzuki Method
Impact Nominal Value Unit Test Method
Charpy Notched lmpact Strength (23°C)
12.0
kJ/㎡
ISO 179
Hardness Nominal Value Unit Test Method
Rockwell Hardness (R-Scale, 23°C)
120
ISO 2039-2
Thermal Nominal Value Unit Test Method
Deflection Temperature Under Load
0.45 MPa. Unannealed
224
°C
ISO 75-2/B
1.8 MPa, Unannealed
215
°C
ISO 75-2/A
Melting Temperature
225
°C
DSC
Coefficient of Linear Thermal Expansion
2 to 3
cm^-5/cm/°C
ISO 11359-2

Bushing Material:

POM + Lubricant + Anti-oxidant + UV Resistant Agent

Mechanical Nominal Value Unit Test Method
Tensile Strength (23°C)
50
MPa
ISO 527-2
Tensile Strain (Break, 23°C)
20
%
ISO 527-1,2
Flexural Modulus (23°C)
2500
MPa
ISO 178
Flexural Stress (23°C)
75
MPa
ISO 178
Coefficient of Friction – vs. Metal
0.16
JIS7218
Impact Nominal Value Unit Test Method
Charpy Notched lmpact Strength (23°C)
5.4
kJ/㎡
ISO 179
Hardness Nominal Value Unit Test Method
Rockwell Hardness (R-Scale, 23°C)
70
ISO 2039-2
Thermal Nominal Value Unit Test Method
Deflection Temperature Under Load(1.8MPa)
80
°C
ISO 75-1,2
Coefficient of linear thermal expansion (23 – 55℃、Flow direction)
11
x10^-5/℃
POLYPLASTICS’ standard
Coefficient of linear thermal expansion (23 – 55℃、Transverse direction)
11
x10^-5/℃
POLYPLASTICS’ standard

Choose XDL Machinery for high-quality, maintenance-free solar tracking bearings.
Save time and costs with our ready-to-ship solutions,
engineered for precision and durability.

Contact us now!

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Catalogue-all spherical photovoltaic bearing for solar tracker

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