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Self-Aligning Ball Bearings with Dust Covers (ZZ2Z Type)
Product description:
Double-row ball bearing design, the outer ring adopts spherical raceway structure, which can automatically compensate for the installation deviation between the shaft and the bearing seat. Metal dust covers (ZZ/2Z logo) are equipped on both sides to effectively prevent dust and other pollutants from entering and maintain internal lubrication.
Main applications:
Agricultural machinery (harvester, seeding machine)
Textile equipment
Food processing machinery
Conveying system
Electric motor
Product features:
Automatic self-aligning function (compensation for angle deviation)
Double metal dust cover protection
Low maintenance design
Double-row structure enhances load-bearing capacity
Smooth operation, low noise
Adapt to harsh working environment
Self-Aligning Ball Bearings with Dust Covers (ZZ/2Z Type) – Overview
Self-aligning ball bearings with dust covers (ZZ or 2Z type) feature a double-row ball design with a spherical outer ring raceway, enabling automatic compensation for misalignment between the shaft and housing. These bearings are equipped with metal shields on both sides (ZZ/2Z designation), effectively blocking dust and contaminants while retaining lubrication.
Typical Applications
These bearings are widely used in:
Agricultural Machinery: Ideal for high-dust environments (e.g., seeders, combine harvesters).
Textile Equipment: Provides self-alignment and smooth operation in high-speed, low-vibration settings.
Food Processing: Shields maintain hygiene by minimizing particle ingress.
Conveyor Systems: Commonly used in industrial belt conveyors.
Electric Motors: Suitable for medium-to-low-speed applications with relaxed shaft alignment requirements.
Key Advantages
Self-Aligning Capability: Compensates for mounting errors or shaft deflection.
Dual Metal Shields (ZZ/2Z): Prevent contamination, extending service life.
Reduced Maintenance: Pre-lubricated design minimizes relubrication needs.
High Load Capacity: Double-row construction enhances radial load handling.
Environmental Adaptability: Tolerates minor misalignment and harsh conditions.
Smooth Operation: Low noise and vibration for precision machinery.
ЧАСТО ЗАДАВАЕМЫЕ ВОПРОСЫ
Q: Are ZZ/2Z bearings waterproof?
A: Shields offer basic dust and light moisture resistance but are not fully waterproof. Avoid submerged use or opt for sealed variants.
Q: Is there a difference between ZZ and 2Z?
A: No—both denote dual metal shields; the labeling varies by manufacturer.
Q: How to select the right model?
A: Consider shaft diameter, load capacity, speed, and operating conditions (e.g., dust, humidity).
Q: Any installation precautions?
A: Ensure clean housing/shaft surfaces, avoid impact mounting, and verify smooth post-installation rotation.
Q: Can shields be removed?
A: No—shields are non-removable. Forcing removal risks damage; use as supplied.
Резюме
Combining self-alignment with robust contamination protection, ZZ/2Z bearings excel in long-life, low-maintenance applications. Their sealing and misalignment tolerance make them critical for industrial equipment under demanding conditions.