6308 Ceramic Ball Bearing with Si3N4 Ceramic and PEEK Cage

Product Specification

High-Performance Hybrid Ceramic Bearing 6308

Si₃N₄ Ceramic Balls with PEEK Cage

1.Product Brief

The 6308 is a deep groove ball bearing transformed into a high-performance component through advanced materials.

It features Silicon Nitride (Si₃N₄) ceramic balls and rings and a PEEK cage. This combination delivers superior speed capability, extended service life, and exceptional resistance to heat, corrosion, and electrical damage, making it the ideal choice where standard steel bearings fall short.

2.Technical Parameters

Parameter Table

3.Working Principle

• Si₃N₄ Ceramic Balls and Rings: Being harder, lighter, and electrically insulating than steel, they drastically reduce centrifugal forces, friction, and wear. This prevents electrical arcing damage and allows for higher rotational speeds and lower operating temperatures.

• PEEK Cage: This high-performance polymer is lightweight, strong, and self-lubricating. It ensures smooth guidance of the ceramic balls at high speeds, outperforming metal retainers by reducing friction, inertia, and the risk of galling, especially in poor lubrication conditions.

Together, these materials create a synergistic effect, resulting in a bearing that runs cooler, faster, and longer.

4. Application Scenarios

This bearing is specifically designed for challenging environments across various industries:

• High-Speed Electric Motors: Ideal for EV traction motors, spindle motors, and high-frequency tools where high RPM and electrical insulation are critical.

• Aerospace & Aviation: Used in auxiliary systems, pumps, and instrumentation requiring reliability in wide temperature ranges and under light lubrication.

• Semiconductor Manufacturing: Excellent for vacuum chambers, robotic arms, and pumps where corrosion resistance and minimal particle generation are essential.

• Precision Machine Tools: The premier choice for high-speed machining spindles (e.g., PCB drilling, milling) that demand extreme rotational accuracy and minimal thermal expansion.

• Harsh Environments: Suitable for chemical processing, food and beverage, and marine applications due to its superior corrosion and chemical resistance.

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Which is better, steel ball or ceramic ball

1. Friction:

Ceramic balls are rounder, lighter, harder, and smoother than steel balls because they are not porous. This reduces friction and energy loss, allowing your equipment to run more efficiently (and for longer) using ceramic ball bearings. Because of their relative smoothness, ceramic ball bearings require less lubrication than steel bearings.

2. Corrosion:

Steel balls corrode over time, and ceramic balls do not corrode even when perfectly lubricated. In fact, in terms of corrosion, the service life of ceramic mixed ball bearings may be ten times that of steel bearings.

3. Bearing seat ring:

Ceramic balls have much lower elasticity than steel balls, and keep this in mind when considering upgrading to ceramic bearings. If you encounter heavy spindle loads or spindle collisions, ceramic balls are more likely to cause damage (indentation) to the bearing raceway. Over time, dents in the raceway will grow larger, eventually leading to spindle failure.

4. Electrical conductivity:

Ceramic bearings are non-magnetic and non-conductive, so they are usually preferred in applications where electrical conductivity needs to be considered. For example, if your motor is controlled by a variable frequency driver.

5. Precision:

In terms of precision, the ABEC grade of the bearings we use is high enough that there is little difference between ceramic bearings and steel bearings. The only difference is that ceramic bearings do not expand as thermal expansion as steel bearings, and therefore do not generate as much heat at high speeds or have as much measurable heat growth.

6. High temperature:

No matter the temperature suddenly rises, or the temperature suddenly drops, our ceramic bearing has no effect at all. Switching between high and low temperature has no effect on ceramic bearing.

7. Long service life:

The density of ceramic rolling ball is lower than that of steel, and the weight is naturally light, so the friction generated by the centrifugal force of rotating the outer ring can be reduced, and the service life of natural ceramic bearings is longer.

Why Choose Us

1.Professional team

Our company logo is ZXSQ and CSQ, and possesses eleven invention patents for utility models. The company now has a high-quality professional team consisting of dozens of members, to provide you with high-quality and perfect service, according to customer requirements to order a variety of bearing products.

Since the year of 1982 we have accumulated abundant experience in the production over the past more than 40 years, devoting ourselves whole -heartedly to the research and development of ceramic bearing material, our processing technique and improvement of our equipments.

Having undergone several evolution and transformation, our company has now become the leading enterprise in China domestic market in the fields of ceramic bearing and ceramic material products.

2.Strength factory

At present, we have a fully automatic grinding and assembling production line for ceramic bearings, with an annual output of 3 million sets of 608-2PS, 608-2RS and other specifications of P5 and P4 precision levels.

Firing equipment and technology leading in the industry. Our company has the most high-end equipment in the field of domestic industrial ceramics production, in addition to the hot isostatic sintering furnace (HIP) imported from ABB Sweden. Our company also has other production equipment, the product firing temperature has been raised to more than 2000℃.

FQA

Q:Who are we?

A:We are a factory in Beijing, China. We have been producing and selling ceramic bearings for more than 40 years. We have established        friendly cooperative relations with many domestic and foreign companies.

Q:How can we guarantee quality?

A:We always produce samples before mass production, and produce in strict accordance with customer requirements and production regulations. After the completion of production, we will use inspection equipment to carry out precise inspection of products, and our packaging adopts the double insurance of foam and carton, to strictly ensure the quality of products.

Q:What can you buy from us?

A:Ceramic deep groove ball bearings, ceramic angular contact ball bearings, hybrid ceramic ball bearings, ceramic linear bearings, etc and all kinds of ceramic balls.

Q:Why should you buy from us not from other suppliers?

A:We are an industry and trade integrated company, we have three factories, with today's production and inspection equipment, can provide better delivery dates and product quality.

Q:What service can we provide?

A:We will provide high quality products and customized services, which can be fully customized according to user needs. We can provide samples for customer's confirmation.

Welcome your enquiry

We supply bearings, high quality products, if you need to buy or consult the price of bearings, please contact us. We are a set of bearing research and development, production, sales, service in one of the professional bearing company, providing bearing products and related technical services. We choose high quality raw materials, carefully do each set of bearings.

We adhere to customer demand as the guidance, and strive to provide customers with quality products and after-sales service, create value for customers, do customers partner. Welcome to discuss the cooperation!