Deep Groove Ball Bearings S688zz & 688-2RS High-Precision Miniature Bearings

• Customization: Available
• Temperature Range: -30°c to +150°c
• Sealing Options: Open, Metal Shield (Zz), or Rubber Seal (2RS)
• Model NO.: 688
• Load Capacity: High
• Lubrication: Pre-Lubricated with Grease or Oil
• Tolerance: ABEC 1 to ABEC 7
• Noise Level: Low, Suitable for Precision Applications
• Applications: Robotics, Medical Devices, Instruments, RC Models,
• Transport Package: Sealed in Plastic Bags, Packed in Foam-Lined Boxes
• Specification: Chrome Steel (AISI 52100) or Stainless Steel (AISI
• 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 68 Series Miniature Ball Bearing

(Custom configurations available upon request.)

Compact Design

Miniature size suitable for high-precision applications requiring small bearings, such as electric motors and compact machinery.
High-Speed Performance

Optimized for high rotational speeds, ensuring smooth and efficient operation with minimal friction.
Shielded and Sealed Options

S688ZZ: Equipped with double metal shields for protection against dust and debris, ideal for clean environments.
688-2RS: Fitted with double rubber seals for enhanced protection against moisture, dirt, and other contaminants.
Material Options

Made from chrome steel or stainless steel for excellent durability and corrosion resistance, meeting diverse operational requirements.
Low Noise and Vibration

Precision engineering ensures quiet operation, making these bearings suitable for noise-sensitive applications like electric motors.
Versatile Applications

Suitable for various industries, including robotics, medical devices, instrumentation, and small electric motors.

 

Parameter	S688ZZ Bearing	688-2RS Bearing
Inner Diameter (ID)	8mm	8mm
Outer Diameter (OD)	16mm	16mm
Width	5mm	5mm
Seal Type	Double Metal Shields (ZZ)	Double Rubber Seals (2RS)
Material	Chrome Steel / Stainless Steel	Chrome Steel / Stainless Steel
Dynamic Load Rating	~0.72 kN	~0.72 kN
Static Load Rating	~0.34 kN	~0.34 kN
Speed Rating	Up to 65,000 RPM	Up to 45,000 RPM
Temperature Range	-40°C to 120°C	-40°C to 100°C
Lubrication	Pre-lubricated with grease	Pre-lubricated with grease
Applications	Precision motors, robots, tools	Small motors, pumps, devices

Designation				Principal dimensions (mm)					Basic load ratings(N)
With shiled	Open type	With seal VV	With seal DD	d	D	B	B1	r(min)	Cr
681				1	3	1		0.05	80
681X	681XZZ			1.5	4	12	2	0.05	112
682	682ZZ		–	2	5	15	23	0.08	169
682X	682XZZ			2.5	6	18	2.6	0.08	208
683A	683AZZ			3	7	2	3	0.1	390
684A	684AZZ			4	9	2.5	4	0.15	640
685	685ZZ		–	5	11	3	5	0.15	715
686A	686AZZ	686AVV	686ADD	6	13	3.5	5	0.15	1080
687	687ZZ1	687VV	687DD	7	14	3.5	5	0.15	1170
688A	688AZZ1	688AVV	688ADD	8	16	4	5	0.2	1610
689	689ZZ1	689VV	689DD	9	17	4	5	0.2	1330

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

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