NSK 6308 ZZ C3 40x90x23 Ball Bearing

Technical Overview & Design Features

Versatile Deep Groove Ball Bearing for Industrial Applications

The NSK 6308 ZZ C3 is a deep groove ball bearing sized 40 mm (bore) x 90 mm (outer diameter) x 23 mm (width), equipped with metal shields (ZZ) on both sides and an increased radial internal clearance (C3). This configuration ensures superior performance under varying temperatures and speeds, stable rotation under radial and axial loads, and excellent protection of internal components from dust, debris, and contamination. As a ready-to-use bearing unit, it is ideal for integration in shafts, housings, gearboxes, motors, and various industrial machinery.

Key Benefits and Typical Industrial Applications

High Durability, Low Maintenance, Broad Use Cases

• Long service life and durability — hardened steel rings and balls provide resistance to wear, vibration, and dynamic loads, ensuring stable long-term performance.

• Sealed against contamination — metal shields (ZZ) keep lubricant inside while preventing ingress of dust, chips or moisture, reducing maintenance needs and extending bearing life.

• High-speed and thermal tolerance — expanded radial clearance C3 accommodates thermal expansion and higher rotational speeds, making the bearing reliable even in demanding conditions.

• Wide range of applications — suitable for electric motors, gearboxes, conveyors, pumps, fans, industrial machinery, automated lines, and any equipment requiring reliable rotational components.

• Ready-to-install bearing unit — standard size and construction allow easy mounting in shafts or housings, facilitating quick replacements and minimizing machine downtime.

Detailed Product Description

The NSK 6308 ZZ C3 40x90x23 ball bearing represents a reliable, versatile solution for a wide spectrum of industrial applications. Its deep-groove design with hardened steel rings and balls ensures efficient distribution of radial and axial loads, stable rotation, and minimal friction. The inclusion of metal shields (ZZ) safeguards internal components against dust, metal shavings, moisture, and other contaminants — a crucial advantage in dusty or harsh operational environments.

With its C3 radial clearance, the bearing is well-suited for operations involving high speeds, temperature fluctuations, or thermal expansion. This makes it especially useful in motors, gearboxes, pumps, fans, conveyor systems and other dynamic applications where both speed and durability matter. The sealed design reduces maintenance intervals and extends overall lifespan, ideal for industrial users seeking reliable, low-care components.

The standard dimensions (40 x 90 x 23 mm) and sealed deep-groove geometry allow straightforward integration into shafts, housings or assemblies — no need for additional parts or complex adaptation. This makes the 6308 ZZ C3 a preferred choice for retrofits, repairs, maintenance operations or new machine builds.

For companies valuing robustness, reliability, low maintenance and ease of installation — NSK 6308 ZZ C3 is a proven bearing solution that ensures smooth, stable operation over long service cycles. It combines the best of performance, protection, and versatility for demanding industrial environments.

FAQ - Frequently Asked Questions

Q: Can this bearing support both radial and axial loads?
A: Yes — the deep groove design allows the 6308 ZZ C3 to handle radial loads and moderate axial loads, making it suitable for many industrial applications.

Q: Does the metal shielding (ZZ) protect the bearing in dirty or dusty environments?
A: Absolutely — the metal shields retain lubricant and prevent ingress of dust, debris or moisture, significantly extending bearing life and reducing maintenance.

Q: Is the bearing suitable for high-speed applications or variable temperatures?
A: Yes — thanks to the C3 radial clearance and quality steel construction, it tolerates thermal expansion and high rotational speeds, ensuring stable operation.

Q: In what types of machinery is this bearing typically used?
A: Electric motors, gearboxes, pumps, fans, conveyor belts, industrial machines, automated lines — any equipment requiring reliable, sealed rotational components.

Q: Is the bearing delivered ready to install?
A: Yes — the unit is a complete bearing ready for direct mounting on shaft or housing, simplifying installation and reducing downtime.