6308 Ceramic Ball Bearing with Si3N4 Ceramic and PEEK Cage

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 with 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.

• 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.

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.

• 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.
• Corrosion: Steel balls corrode over time, and ceramic balls do not corrode even when perfectly lubricated. In terms of corrosion, the service life of ceramic mixed ball bearings may be ten times that of steel bearings.
• Bearing seat ring: Ceramic balls have much lower elasticity than steel balls. If you encounter heavy spindle loads or spindle collisions, ceramic balls are more likely to cause damage (indentation) to the bearing raceway.
• Electrical conductivity: Ceramic bearings are non-magnetic and non-conductive, making them preferred in applications where electrical conductivity needs to be considered.
• Precision: 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.
• High temperature: No matter the temperature suddenly rises or drops, our ceramic bearing has no effect at all.
• Long service life: The density of ceramic rolling ball is lower than that of steel, reducing friction generated by the centrifugal force of rotating the outer ring, resulting in longer service life.

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.

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℃.