Double Row Cylindrical Roller Bearing

Double Row Cylindrical Roller Bearing

A double row cylindrical roller bearing is a type of rolling element bearing that is designed to support high radial loads and moderate axial loads in both directions. As the name suggests, this type of bearing consists of two rows of cylindrical rollers that are guided by a common outer ring and two inner rings. The two inner rings are usually of equal size and are separated by a central rib.The cylindrical rollers in a double row cylindrical roller bearing are typically longer than those found in single row cylindrical roller bearings and are arranged in a line perpendicular to the axis of the bearing. This design allows the bearing to handle higher radial loads than a single row cylindrical roller bearing of the same size and also provides some axial load capacity in both directions.Double row cylindrical roller bearings are commonly used in heavy machinery and equipment, such as rolling mills, gearboxes, and pumps, where high radial loads and moderate axial loads are present. They are also used in the automotive industry, particularly in wheel hub assemblies. Double row cylindrical roller bearings are available in a variety of sizes and configurations to meet the specific needs of different applications. They can be ordered with a variety of cage materials, such as brass, plastic, or steel, and with a variety of lubricants.

▍Double Row Cylindrical Roller Bearing Size Chart

Bearing Number	d	D	B	Static   load(kN)	Dynamic load(kN)	Mass (kg)
NN3052K	260	400	104	969	1810	47.1
NN3052	260	400	104	969	1810	48.5
NN3056K	280	420	106	1020	1950	49.1
NN3056	280	420	106	1020	1950	49.87
NN3060	300	460	118	1180	2250	71.7
NN3060/Y1	300	460	118	1180	2250	71.2
NN3060K	300	460	118	1180	2250	69.6
NN3064K	320	480	121	1250	2450	75
NN3068K	340	520	133	1560	3020	101
NN3068	340	520	133	1560	3020	104
NN3072K	360	540	134	1630	3240	106
NN3076K	380	560	135	1590	3240	110
NN3076	380	560	135	1590	3240	114
NN3176V	380	620	194	2700	5800	221
NN3980K	400	540	108	1240	2400	71.3
NN3080K	400	600	148	1980	3660	143
NN3080	400	600	148	1980	3660	147
NN3092K	460	680	168	2470	5070	204
NN39/560	560	750	140	2370	4860	188
NN6/560	560	780	180	2400	6400	266
NN30/560K	560	820	195	2460	6560	341
NN30/670	670	980	280	4620	9360	597

▍Double Row Cylindrical Roller Bearing Parts

Double row cylindrical roller bearings are made up of a number of different parts, each of which plays an important role in the bearing's operation. These parts include:Inner ring: The inner ring is the stationary part of the double row cylindrical roller bearing that fits into the housing. It has a machined surface that the rollers roll on.Outer ring: The outer ring is the rotating part of the double row cylindrical roller bearing that fits onto the shaft. It also has a machined surface that the rollers roll on.Rollers: The rollers are the cylindrical elements that carry the load in the double row cylindrical roller bearing. They are made of a strong material, such as steel or cast iron, and have a logarithmic profile that helps to reduce friction and wear.Cage: The cage is a cage-like structure that keeps the rollers evenly spaced and prevents them from coming into contact with each other. It is typically made of a lightweight material, such as plastic or aluminum.Seals: The seals prevent the entry of contaminants, such as dust and dirt, into the double row cylindrical roller bearing. They are typically made of a soft material, such as rubber or plastic, and are molded to fit the bearing housing and outer ring.All of these parts work together to ensure that the double row cylindrical roller bearing can carry high radial loads and has a long service life.

▍Features of Double Row Cylindrical Roller Bearing

Double row cylindrical roller bearings have a number of features that make them well-suited for a variety of applications. These features include:1. High radial load capacity: Double row cylindrical roller bearings have a high radial load capacity, making them ideal for applications where heavy loads are present.2. Long service life: Double row cylindrical roller bearings have a long service life, thanks to their durable design and construction.3. Low maintenance requirements: Double row cylindrical roller bearings require very little maintenance, making them a cost-effective option for many applications.4. Wide range of applications: Double row cylindrical roller bearings can be used in a wide range of applications, including heavy machinery, mining equipment, construction equipment, and more.

▍Double Row Cylindrical Roller Bearing Applications

Double row cylindrical roller bearings are used in a wide range of applications where heavy radial loads and moderate axial loads are present. Some common applications include:(1) Rolling mills: Double row cylindrical roller bearings are commonly used in rolling mills for the steel industry, where they provide support for heavy radial loads and moderate axial loads in both directions.(2) Gearboxes: Gearboxes in various industries, such as automotive, aerospace, and industrial machinery, often use double row cylindrical roller bearings due to their high load capacity and durability.(3) Pumps: Double row cylindrical roller bearings are used in pumps for the oil and gas industry, as well as in water treatment plants, where they provide support for heavy radial loads and moderate axial loads.(4) Wind turbines: Double row cylindrical roller bearings are used in wind turbines to support the main shaft and handle the high radial loads and moderate axial loads generated by the rotor.(5) Mining equipment: Mining equipment, such as crushers, conveyors, and excavators, often use double row cylindrical roller bearings due to their ability to handle heavy loads in harsh operating environments.(6) Printing presses: Double row cylindrical roller bearings are used in printing presses, where they provide support for heavy printing cylinders and handle the high radial and moderate axial loads generated during the printing process.Overall, double row cylindrical roller bearings are widely used in heavy-duty applications where high load capacity, durability, and reliability are important factors.

▍Cylindrical Roller Bearings Vs Spherical Roller Bearings

Cylindrical roller bearings and spherical roller bearings are both types of roller bearings that use cylindrical rollers to support radial loads. However, there are some key differences between the two types of bearings.Cylindrical roller bearings have a cylindrical raceway and cylindrical rollers. The rollers are arranged in a line along the axis of the bearing. Cylindrical roller bearings are typically used in applications where high radial loads need to be supported, such as in heavy machinery and industrial equipment.Spherical roller bearings have a spherical raceway and spherical rollers. The rollers are able to conform to the shape of the raceway, which allows the bearing to accommodate misalignment. Spherical roller bearings are typically used in applications where high radial and thrust loads need to be supported, such as in automotive and aerospace applications.The following table summarizes the key differences between cylindrical roller bearings and spherical roller bearings:In general, spherical roller bearings are more expensive than cylindrical roller bearings. However, spherical roller bearings offer the advantage of being able to accommodate misalignment, which can make them a more reliable choice for some applications.Here are some additional points to consider when choosing between cylindrical roller bearings and spherical roller bearings:

• Cost: Spherical roller bearings are typically more expensive than cylindrical roller bearings.
• Load capacity: Cylindrical roller bearings have a higher radial load capacity than spherical roller bearings.
• Misalignment tolerance: Spherical roller bearings have a higher misalignment tolerance than cylindrical roller bearings.
• Application: Cylindrical roller bearings are typically used in applications where high radial loads need to be supported. Spherical roller bearings are typically used in applications where high radial and thrust loads need to be supported.

If you are unsure which type of bearing is right for your application, it is always best to consult with a bearing expert.

Cylindrical Roller Bearings	Spherical Roller Bearings

▍Double Row Cylindrical Roller Bearing Manufacturers

We are a professional bearing exporter in China, producing many bearings in different sizes and sizes. We can provide you with excellent service in a wide range of bearings with world-class quality, such as deep groove ball bearings, spherical roller bearings, spherical ball bearings, cylindrical roller bearings, tapered roller bearings, angular contact ball bearings, etc. Bearings can also provide OEM services according to customer requirements. We adhere to strict global standards, which is why we can provide you with a wide range of bearings of world-class quality. We have always adhered to the principle of “integrity-based, quality first, customer foremost.” We are ready to use our sincerity to serve every global customer for long-term and win-win cooperation.