single row cylindrical bearing

Deep groove ball bearing with seals or shields

Single row deep groove ball bearings with seals or shields are particularly versatile, have low friction and are optimized for low noise and low vibration, which enables high rotational speeds. They accommodate radial and axial loads in both directions, are easy to mount, and require less maintenance than many other bearing types. The integral sealing can significantly prolong bearing service life because it keeps lubricant in the bearings and contaminants out.Integral sea

ling prolongs bearing service life

Simple, versatile and robust design

Low friction and high-speed capability

Accommodate radial and axial loads in both directions

Require little maintenance

Knowledge and introduction of bearings    :                                                                                                 

Single-row cylindrical bearings are a type of rolling-element bearing that is designed to handle high radial loads while allowing for high-speed rotation. Here's a detailed introduction to single-row cylindrical bearings:

Design and Features

Single-row cylindrical roller bearings consist of cylindrical rollers held in place by a cage, which guides the rollers to ensure they move in a straight line between the inner and outer rings. The rollers are in linear contact with the raceways, offering high load capacity under primarily radial loads. These bearings have a simple structure, which contributes to their efficiency and reliability.

Types and Designations

Single-row cylindrical bearings are designated as NU, NJ, NUP, N, or NF types. The differences in designations indicate variations in the design, such as the presence of ribs on the inner or outer rings, which affect the ability of the bearing to handle axial loads.

• NU Type: Outer rings have two ribs, and the inner ring does not. The outer ring, roller, and cage assembly can be separated from the inner ring. These cannot accommodate any axial loading and are often used as floating side bearings in a fixed-float arrangement.

• NJ Type: Has two ribs on the outer ring and a single rib on the inner ring. Can receive single-direction axial loads.

• NUP Type: Similar to NJ type but with a collar ring attached to the ribless side of the inner ring. Can accommodate axial loads in both directions.

Applications

Single-row cylindrical roller bearings are widely used in various industries due to their ability to tolerate high radial loads and moderate thrust loads. Some applications include:

• Aircraft Landing Gear: They provide necessary support for radial loads during takeoff, landing, and taxiing.

• Printing and Papermaking: Used in paper machines to support rolls at various stages of production.

• Wind Turbines: Main shaft bearings handle both radial and axial loads generated by the rotating blades.

• Automotive Industry: Wheel bearings in cars and trucks manage the vehicle’s mass and loads.

• Machine Tools: Used in the spinning parts of machines like lathes and mills to carry weight and maintain accuracy.

• Electric Motors: Support rotating parts while handling the weight during operation.

Advantages

The advantages of single-row cylindrical roller bearings include:

1. High Radial Load Capacity: They are designed to handle heavy radial loads due to the line contact between the rollers and raceways.

2. Space Efficiency: Their compact design saves space in applications where size is a constraint.

3. High-Speed Capability: Low friction between the rollers and ring ribs makes them suitable for high-speed rotation.

4. Ease of Installation and Maintenance: The separable design allows for easy installation and disassembly, even with interference fits.

5. Versatility in Design: Different configurations of flanges allow for customization to specific application needs.

6. Alignment Compensation: Some designs can accommodate minor misalignments.

7. Durable and Long-Lasting: Built to last with high-quality materials and precision manufacturing.

8. Customization Options: A wide range of sizes and cage materials are available to suit various applications.

9. Cost-Effective: Offer a good balance of performance and cost efficiency.

Working Principle

Single-row cylindrical roller bearings operate by allowing the cylindrical rollers to roll between the inner and outer rings, with the cage ensuring the rollers remain in alignment. This rolling motion provides smooth operation and reduces friction, which is ideal for high-speed applications.

In summary, single-row cylindrical roller bearings are precision-engineered components that offer high radial load capacity, high-speed performance, and reliability across a broad range of industrial applications. Their design and material choices make them a popular choice for engineers looking to optimize machinery performance and longevity.

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