6308 2RS NR NSK Ball Bearing 40x90x23 Sealed with Snap Ring

Main Description

The 6308 2RS NR NSK ball bearing 40x90x23 is a heavy-duty deep groove ball bearing with dual rubber seals and a retaining ring, designed for high load capacity, contamination protection, and secure axial positioning in industrial systems.

Within the deep groove ball bearings 63xx series, the 6308 2RS NR NSK is optimized for higher load applications compared to the 62xx range, while still maintaining efficient rotational performance. The 2RS sealing system protects the bearing from dust, moisture, and contaminants, while retaining lubricant inside, significantly extending service life. The NR configuration includes a groove and snap ring, allowing fast and precise axial fixation in the housing without additional locking components.

The 40x90x23 bearing size is commonly used in medium to heavy industrial machinery where durability and reliability are critical.

Construction and Design

The 6308 2RS NR NSK bearing is engineered for strength and long-term operation.

Key design features:

• single-row deep groove ball bearing
• rubber seals on both sides (2RS)
• precision groove in the outer ring
• retaining ring included for axial locking
• high-grade bearing steel for durability
• steel cage for stable performance

The sealed design reduces contamination and lubricant loss, ensuring consistent operation in demanding environments.

Industrial Applications

The 6308 2RS NR NSK bearing is widely used in systems requiring high load capacity and environmental protection.

Typical applications include:

• electric motors and heavy-duty drives
• industrial gearboxes and transmissions
• pumps and compressors
• conveyor systems
• construction and agricultural machinery

The snap ring simplifies installation and ensures secure positioning within the housing.

Technical Parameters

• type: deep groove ball bearing
• series: 63xx
• model: 6308 2RS NR NSK
• inner diameter: 40 mm
• outer diameter: 90 mm
• width: 23 mm
• design: sealed on both sides (2RS)
• feature: groove and retaining ring (NR)
• material: bearing steel
• cage: steel
• operating characteristics: high load capacity, medium speed

Operational Advantages

The 6308 2RS NR NSK bearing provides several advantages:

• high resistance to dust and moisture
• extended service life due to sealed lubrication
• increased load capacity compared to 62xx series
• integrated axial locking system
• reduced maintenance and easy installation

This makes it an ideal solution for demanding industrial environments.

FAQ

What does 2RS NR mean in 6308 2RS NR NSK?
2RS indicates rubber seals on both sides, while NR means groove and retaining ring included.

Is this bearing suitable for heavy-duty applications?
Yes, the 63xx series is designed for higher load capacity.

Does it include the snap ring?
Yes, NR versions are supplied with a retaining ring.

Can it be used in dusty or wet environments?
Yes, the seals provide strong protection against contamination.

Where is this bearing typically used?
In motors, gearboxes, conveyors, and industrial machinery.