Cylindrical Roller Bearings

What is a cylindrical roller bearing

Cylindrical roller bearings consist of an inner ring, an outer ring, and cylindrical rollers that reduce friction and wear on the bearing surfaces. The rings have ribs or flanges that guide the rollers along their length. This design helps distribute loads evenly over a large surface area while maintaining excellent alignment capability.

There are many types of cylindrical roller bearings. They vary by the number of rows of rollers (usually one, two, or four) and whether they have cages. The absence of a cage allows the bearing to have more columns, which helps support heavier radial loads. These types of bearings are typically used in rotating applications.

Single row cylindrical rollers are the most popular and are separable, which makes installation and removal easier. However, these may not be able to support the radial loads of some applications. Double-row and multi-row cylindrical roller bearings provide greater radial load capacity and can also transmit axial loads in one direction.

Like other types, cylindrical roller bearings come in a variety of clearance and lubrication options, depending on the manufacturer and supplier. Cylindrical roller bearings can be manufactured with cages or as full complement parts.

Single Row Cylindrical Roller Bearings

Single row roller bearings are detachable, the ring with guide flange is together with the cage with rollers, and the second ring can be assembled separately. They are manufactured in several series in basic designs NU, N, NJ and NUP.

These bearings have high rigidity, low friction, the ability to transmit high radial loads, and are suitable for high speeds.

These types of roller bearings are suitable for special placement applications and are available with low or high radial clearance. Bearings are manufactured with normal precision. In order to obtain higher precision or higher rotational frequency, use bearings with higher running precision.

Double Row Cylindrical Roller Bearings

Cylindrical bearings are designed for extra strength against radial loads. These bearing types are interchangeable so that the dimensions and diameters below the rollers (type NNU) and above the rollers (type NN) conform to ISO/DIN standards. Interchangeability Designed for rings without rollers, interchangeable with competitor inner rings.

These bearings are used where thin-walled bearings are required, such as printing cylinders of printing machinery, rolling mill rolls and spindles of machine tools. In machine tool spindles, the radial internal clearance is adjusted by pushing a tapered shaft into the inner ring of the tapered bore.

What are the significant advantages of cylindrical roller bearings?

• Greater radial load capacity compared to ball bearings
• Roller design accepts faster speeds than other types of roller bearings
• Resists damage from fatigue
• Easy installation reduces potential installation damage
• Slim to save space and weight

What are cylindrical roller bearings used for?

With greater radial load capacity, the ability to accommodate higher speeds, and other advantages, cylindrical roller bearings are ideal for use in a variety of industries. Typical markets where these parts can be used include:

• oil and gas
• gearbox
• machine tool
• electric motor
• material handling
• Pump
• steel mill
• mining
• Power Generation/Wind Turbines
• power transmission