Deep groove ball bearing SNR 6209F604, Outer diameter: 85 mm | Width: 19 mm | Inner diameter: 45 mm

TOPLINE deep groove ball bearing, radial contact, pressed steel cage, shields on both sides, applications upto 350°C.

This product from the SNR brand is a reliable solution for applications with very high temperatures and low rotational speeds. It is designed to combine protection, durability and performance and is ideally suited for mechanical systems exposed to severe thermal stresses. Thanks to its special design, the bearing ensures long-lasting performance even under extreme conditions while providing smooth, low-friction operation.

Features:
This deep-groove ball bearing of the Topline series is single-row and fitted with a robust yet lightweight stamped steel cage. It is factory-filled with a high-temperature lubricant specifically designed for extreme thermal environments. The internal radial clearance is greatly increased (C5) to accommodate significant thermal expansions. This configuration is ideal for low to moderate speeds up to a maximum of 50 U/min and withstands temperatures up to 350 °C. A special surface treatment, consisting of phosphating and a MoS₂ coating, improves dry-running lubrication and provides enhanced oxidation protection. The bearing has good radial load capacity and tolerates limited axial loads in both directions.

Maintenance:
The bearing is designed to be maintenance-free provided it is correctly mounted and operated within the defined operating limits. It is supplied from the factory with a special grease based on polyalkylene glycol and solid additives, offering high thermal stability and long-lasting lubrication. No relubrication is required during the product's service life. Because there is no contact between the deflectors and the rolling elements, wear is reduced and internal cleanliness is maintained.

Sealing:
This model is equipped on both sides with non-contact metal end shields. These stamped steel shields form an effective barrier against solid contaminants such as dust or metal particles. A V-shaped groove in the inner ring face creates a labyrinth sealing effect that prevents ingress of dirt while retaining the lubricant inside. This sealing system protects the bearing without hindering rotation and makes it ideal for low-friction applications. It should be noted, however, that protection in wet or corrosive environments is limited.

Brand information:
SNR is a brand of the NTN Group, a world-leading supplier in the field of drive technology. With a presence in multiple countries, SNR offers innovative solutions for the automotive, industrial and aerospace sectors. The brand's mission: reliable, high-performance and easy-to-integrate products. For over 100 years SNR has supported professionals with recognized expertise and consistently high manufacturing quality.

Strengths:
• High temperature resistance up to 350 °C thanks to high-temperature lubricant and enhanced surface treatment
• Minimal maintenance requirements due to long-lasting lubrication and efficient deflectors
• Stable mechanical properties under moderate radial load and even running behavior
• Effective protection against solid contaminants through a labyrinth seal with non-contact deflectors
• Suitable for low speeds up to 50 U/min while offering high thermal and dynamic efficiency
• Quiet operation due to reduced vibrations and balanced components

Applications:
This single-row ball bearing is ideal for industrial applications with high temperatures. It is used, among others, in furnace conveyor systems, production lines for ceramics or glass, painting and heat-treatment facilities, as well as plastics processing plants located near heat sources. It is perfectly suited to static or slowly rotating mechanisms exposed to repeated thermal cycles.