High-Performance 6904 Double-Row Plastic Ball Bearings for Pools

• Customization: Available
• Temperature Range: -40°C to +250°C
• Corrosion Resistance: Excellent (Chemical and Saline Environments)
• Model NO.: 6904
• Application Environment: Underwater, Cleanroom, Chemical
• Lubrication: Dry / Grease (Customizable)
• Tolerance: ABEC 1 to ABEC 7
• Noise Level: Low, Suitable for Precision Applications
• Transport Package: Sealed in Plastic Bags, Packed in Foam-Lined Boxes
• Specification: PEEK
• Trademark: LOWIFAR
• Origin: China
• HS Code: 848210
• Production Capacity: 50000PCS/Year
• Package Size: 10.00cm * 2.00cm * 10.00cm
• Package Gross Weight: 0.020kg

Product Description

Key Features of Double-Row Deep Groove Plastic Ball Bearing 6904 

(Custom configurations available upon request.)

Double-Row Ball Structure: Enhances load capacity and stability for continuous operation in submerged conditions
Corrosion-Resistant Material: Made from high-performance plastic (such as POM, PA66, or PEEK), suitable for chlorinated and saltwater environments
Waterproof and Non-Magnetic: Ideal for swimming pool cleaning robots, underwater vacuums, and marine gear
Low Friction, Long Life: Designed for smooth operation, reduced wear, and longer service in wet environments
Customizable Ball Materials: Available with glass, ceramic, or stainless steel balls based on usage requirements
Lightweight and Maintenance-Free: Self-lubricating structure ensures quiet, reliable performance without external lubrication

Model	6904 (Double-Row)
Bearing Type	Deep Groove Ball Bearing
Structure	Double-Row
Bore Diameter (ID)	20 mm
Outer Diameter (OD)	37 mm
Width	18 mm
Material	POM / PA66 / PEEK (customizable)
Ball Material	Glass / Ceramic / Stainless Steel (optional)
Seal Type	Open / RS / ZZ (customizable)
Corrosion Resistance	Excellent (chlorine, saltwater)
Temperature Range	-20°C to +120°C (depends on material)
Applications	Swimming pool robots, underwater cleaning devices, marine automation systems
Lubrication	Dry / Grease (customizable)
Customization	Available on request

High-Precision Ceramic and Stainless Steel Bearings Manufacturer

Delivering exceptional quality and precision, our ceramic and stainless steel bearings are engineered to meet the diverse needs of industries worldwide. Trusted for durability and performance, we are your reliable partner in advanced bearing solutions.

Specification

Bearing Designation			Dimension(mm)				Basic load ratings  (kN)		Speed ratings(rpm)
Open	RS	ZZ	d	D	B	rs min	Cr	Cor	Grease
6900	6900 RS	6900 ZZ	10	22	6	0.3	2.7	1.27	30000
6901	6901 RS	6901 ZZ	12	24	6	0.3	2.89	1.46	27000
6902	6902 RS	6902 ZZ	15	28	7	0.3	3.65	2	24000
6903	6903 RS	6903 ZZ	17	30	7	0.3	4.65	2.58	22000
6904	6904 RS	6904 ZZ	20	37	9	0.3	6.4	3.7	19000
6905	6905 RS	6905 ZZ	25	42	9	0.3	7.05	4.55	16000
6906	6906 RS	6906 ZZ	30	47	9	0.3	7.25	5	14000
6907	6907 RS	6907 ZZ	35	55	10	0.6	9.55	6.85	12000
6908	6908 RS	6908 ZZ	40	62	12	0.6	12.2	8.9	11000
6909	6909 RS	6909 ZZ	45	68	12	0.6	13.1	10.4	9000
6910	6910 RS	6910 ZZ	50	72	12	0.6	13.4	11.2	8900
6911	6911 RS	6911 ZZ	55	80	13	1	16	13.3	8200
6912	6912 RS	6912 ZZ	60	85	13	1	16.4	14.3	7600
6913	6913 RS	6913 ZZ	65	90	13	1	17.4	16.1	7000
6914	6914 RS	6914 ZZ	70	100	16	1	23.7	21.2	6500
6915	6915 RS	6915 ZZ	75	105	16	1	24.4	22.6	6100
6916	6916 RS	6916 ZZ	80	110	16	1	24.9	24	5700
6917	6917 RS	6917 ZZ	85	120	18	1.1	32	29.6	5400

6918	6918 RS	6918 ZZ	90	125	18	1.1	33	31.5	5100
6919	6919 RS	6919 ZZ	95	130	18	1.1	33.5	33.5	4800

Applications
Aerospace: High-performance bearings for aircraft engines and systems.
Automotive: Durable solutions for engines, transmissions, and electric vehicles.
Medical Equipment: Precision bearings for surgical tools and diagnostic devices.
Industrial Machinery: Robust bearings for heavy-duty operations in manufacturing and production.
Renewable Energy: Specialized bearings for wind turbines and solar tracking systems.
Food & Beverage: Corrosion-resistant bearings for hygienic and reliable operations.
 
Key Configurations
Ceramic Bearings: Offering high temperature resistance, low friction, and excellent corrosion resistance.
Custom Designs: Tailored bearing solutions to meet specific application requirements.
High-Precision Tolerances: Ensuring consistent performance in demanding applications.
Maintenance-Free Options: Sealed bearings for enhanced durability and reduced downtime.

Production Process

1) Premium-grade ceramic and stainless steel materials are sourced to meet stringent quality standards.
2) Advanced CNC and grinding machines shape the bearing components to achieve tight tolerances and smooth finishes.
3) Precision polishing ensures low friction and optimal performance for both ceramic and stainless steel bearings.
4)Bearings are carefully assembled in a clean, controlled environment to maintain integrity and precision.
5) Rigorous quality checks, including dimensional accuracy, surface finish, and load testing, are performed to ensure every bearing meets or exceeds industry standards.

Ceramic bearing

Stainless steel bearing

Hybrid ceramic bearing

Many years of experience in bearing business

After Sales Service

Technical Support: Expert guidance for installation, maintenance, and troubleshooting to ensure optimal performance.
Warranty Assurance: Coverage for manufacturing defects, providing peace of mind with every purchase.
Customized Solutions: Tailored advice and modifications to address specific operational challenges or requirements.
Prompt Response: Dedicated support team available to address inquiries and resolve issues quickly and effectively.

Company Profile

At LOWIFAR Bearings, we specialize in designing and manufacturing a wide range of precision, high-quality ball bearings and tapered roller bearings. Our products are designed to meet the demands of heavy agricultural machinery, textile machinery, various engineering applications, motors, automobiles, computers, electric appliances, power tools, pumps, and more.

With over ten years of experience in bearing production, LOWIFAR is a trusted manufacturer dedicated to providing custom-made bearing solutions to meet your unique requirements.

Our experienced and professional team ensures that we deliver products of the highest quality. We are proud to have exported our bearings to numerous countries and regions worldwide, including Europe, North America, India, Thailand, South Korea, Mexico, Turkey, Argentina, Russia, and many others.

Our bearings have earned a strong reputation for reliability and performance among our global customer base. We invite customers, business partners, and friends from all over the world to connect with us for mutually beneficial cooperation.

FAQ

1. What are ceramic bearings?
Ceramic bearings are bearings made from advanced ceramic materials such as Zirconia (ZrO2) or Silicon Nitride (Si3N4). They are known for their high strength, wear resistance, and ability to perform in extreme conditions.

2. What are the advantages of ceramic bearings over steel bearings?
Ceramic bearings offer several advantages, including:

  Higher Durability: Resistant to wear, corrosion, and high temperatures.
  Lighter Weight: Up to 40% lighter than steel bearings.
  Non-Magnetic & Electrically Insulating: Ideal for sensitive applications.
  Low Friction: Reduces energy loss and heat generation.
3. In which industries are ceramic bearings commonly used?
Ceramic bearings are widely used in:

  Packaging equipment
  Renewable energy (e.g., wind turbines)
  Aerospace and automotive
  Medical devices
  Chemical processing
  High-precision tools
4. Can ceramic bearings handle high temperatures?
Yes, ceramic bearings are highly resistant to heat and can operate in temperatures exceeding 1,000°C, depending on the material used.

5. Are ceramic bearings suitable for corrosive environments?
Absolutely! Ceramic bearings are non-reactive to most chemicals, making them ideal for use in highly corrosive environments.

6. What is the lifespan of ceramic bearings?
Ceramic bearings typically last much longer than steel bearings due to their wear resistance and durability. However, the exact lifespan depends on the operating conditions and maintenance practices.

7. How do I maintain ceramic bearings?
Ceramic bearings require minimal maintenance, but to ensure longevity:

  Use the correct lubrication when necessary.
  Keep them clean and free from contaminants.
  Follow proper installation procedures.
8. Do you provide customized ceramic bearings?
Yes, we offer tailored ceramic bearing solutions to meet your specific application requirements. Contact us to discuss your needs.

9. What sizes and types of ceramic bearings do you offer?
We supply a wide range of sizes and configurations, including ball bearings, roller bearings, and hybrid bearings. Check our product catalog or contact us for more details

10. How can I place an order or request a quote?
Simply visit our Contact Us page, fill out the inquiry form, or reach out to us directly via email or phone. Our team will respond promptly with the information you need