Deep groove ball bearing SNR 6308NREE, Outer diameter: 90 mm | Width: 23 mm | Inner diameter: 40 mm

This SNR deep groove ball bearing has been specially designed for damp, dusty or splash-prone environments. Thanks to the double-sided seals and its robust construction it ensures stable and reliable operation. It is the ideal solution for users seeking a long-lasting, maintenance-free bearing for moderate-speed applications and is characterized by a high degree of protection, good load-carrying capacity and easy integration into a wide range of mechanisms.

Features:
The single-row ball bearing features a lightweight yet durable pressed steel cage. It is equipped with a standard radial clearance (CN) that allows good alignment of the rolling elements and smooth running. The double-sided seals provide excellent protection against contamination but cause a slight reduction in maximum permissible speed due to permanent contact with the inner ring. The groove for a circlip on the outer ring face, combined with the factory-fitted circlip, facilitates axial mounting in the housing. The bearing primarily carries radial loads but can also tolerate moderate axial forces in both directions. Its design ensures uniform load distribution and high stability at medium speeds.

Maintenance:
This model is factory-filled with a high-performance grease. Additional re-lubrication is not required under normal operating conditions. The contacting seals ensure reliable grease retention and prevent the ingress of particles. This makes the bearing completely maintenance-free and ideal for hard-to-reach equipment where maintenance interventions should be minimized. To retain full performance, temperature and load limits should be observed.

Sealing:
The bearing is fitted on both sides with NBR rubber lip seals. These provide effective protection against dust, water, oils and greases. The permanent contact between seal and inner ring forms a reliable barrier against solid and liquid contaminants. This significantly extends service life even in severe operating conditions. At the same time this type of sealing causes a slightly increased frictional resistance, which limits the permissible speed somewhat compared with open or centrifugally sealed designs.

Brand information:
SNR is a brand of the NTN Group and is regarded as a specialist in rolling bearing and drive solutions. With over 100 years of experience the company develops innovative products for the industrial, automotive and rail sectors. Quality, reliability and innovation are the focus. Thanks to controlled European manufacturing, SNR offers high-performance, robust products that meet the highest technical requirements.

Strengths:
• Increased protection against water, dust and greases thanks to double-sided NBR seals
• Long-life lubrication – no maintenance required under normal operating conditions
• Good radial load capacity with tolerance to axial forces in both directions
• Easy axial mounting thanks to integrated circlip groove
• Stable running due to standardized radial clearance
• Quiet operation with low vibration levels
• High corrosion resistance in humid environments

Applications:
This single-row deep groove ball bearing is particularly suitable for conveyor systems, carrying rollers or semi-enclosed assemblies. It can be easily integrated into systems where dust and moisture protection are critical. Ideal at moderate speeds, it is recommended for industrial environments exposed to splashing water or with limited maintenance possibilities. Its compact design makes it versatile, especially where reliability and simple handling are required.