What are Class 2 bearings cylindrical roller bearings used for?

Product name: Cylindrical roller bearings.

Model: NU2236, NJ1040, etc.

Industry Applications Cylindrical roller bearings are mainly used in motors, machine tools, petroleum, rolling mills, loading and unloading machinery and various industrial machinery.

Product Features Cylindrical roller bearings are separable bearings, which are very convenient to install and disassemble. Cylindrical roller bearings are available in single-row, double-row and four-row. Single-row cylindrical roller bearings are divided into N-type, N-type, NJ-type, NF-type and NUP type according to the different ring flanges.

Cylindrical roller bearings have a large radial load capacity, and can also bear a certain unidirectional or bidirectional axial load according to the structure of the ring flange.

NN type and NNU type double row cylindrical roller bearings have compact structure, strong rigidity, large bearing capacity, and small deformation after loading, and are mostly used for the support of machine tool spindles. FC, FCD, FCDP four-row cylindrical roller bearings can bear large radial loads, and are mostly used in heavy machinery such as rolling mills.

Cylindrical roller bearings: can withstand heavy radial loads in high-speed operation, single row EC type design cylindrical roller bearings with optimized internal curves, can improve the radial and axial load capacity of the bearing, while improving the adjustment ability of angle and alignment errors and improve lubrication, omitting the cage full roller bearings can have the maximum number of rollers. Suitable for very heavy loads and moderate speeds.

n design. There are two integral flanges in the inner ring and no flange in the outer ring. The axial displacement of the shaft relative to the housing can be experienced in the bearing in both directions. Therefore, these bearings are used as non-locating end bearings.

NU design. The NU design has two integral flanges in the outer ring and no flange in the inner ring. The axial displacement of the shaft relative to the housing can be experienced in the bearing in both directions.

Therefore, these bearings are used as non-locating end bearings. Due to manufacturing and maintenance reasons, the two outer ring flanges of large bearings of the NU design indicated by drawing numbers are not necessarily monolithic, but will be in the form of loose-fit flange rings.

NJ Design. There are two integral flanges in the outer ring and one integral flange in the inner ring. As a result, these bearings are suitable for axial positioning of the shaft in one direction.

NUP design.

There are two integral flanges in the outer ring, one integral flange in the inner ring and one non-integral flange in the form of loose fit flange rings. These bearings can be used as locating end bearings, which provide axial positioning of the shaft in both directions.

Cylindrical roller bearings Luoyang Longma Bearing **** There are many types of cylindrical roller bearings, which are distinguished by structure, including N, NF, NJ, NU, NUP, NCL, RN and RNU types. In terms of load capacity, there are ordinary and reinforced cylindrical roller bearings. The dimensions of the reinforced cylindrical roller bearing are the same as those of the ordinary type, but the diameter, length and number of rollers have increased, so the load bearing capacity has increased.

Distinguished by the number of rows of cylindrical rollers, there are single row and multi-row cylindrical roller bearings. Cylindrical roller bearings are divided into four rows of cylindrical rollers and double rows of cylindrical rollers, with high radial load capacity, but can not withstand axial forces, small radial size, high limit speed, because the inner ring has no flange, so the inner ring and outer ring assembly can be installed separately (with a full set of rollers and cage). -This kind of bearing has the advantages of large radial load capacity, high rotation accuracy, and convenient installation and disassembly for all kinds of cold and hot rolling mills with frequent roll replacement.

It is suitable for work rolls or back-up rolls on various hot and cold rolling mills, billet openers and other rolling mills.

Cylindrical roller bearings are characterized by the fact that the rolling elements are cylindrical rather than spherical, <>

XRT series crossed roller bearings are designed to provide high rotational accuracy and stiffness in a small space, resulting in significant material cost savings. This kind of bearing is to install two sets of bearing raceways and rollers at right angles cross-cross, adjacent rollers are facing opposite directions, and isolation blocks are installed between rollers and rollers, and supporting gaskets are also installed on the rollers, so that the two halves of the rollers can accommodate in the same space. The angle and tapered geometry of the bearing make the effective span of the bearing several times larger than the actual width of the bearing itself.

XRT series bearings are suitable for high-speed machine tool applications such as vertical boring machines and vertical grinding machines. It is also particularly suitable for many equipment with limited space and high requirements for rotation accuracy. Inner diameter mm to mm ( into in)

Outer diameter mm to mm ( into inThe XRT series has two rows of tapered rollers arranged vertically on the V-shaped disc surface at 90° through a spacer retainer, and can withstand loads in all directions, such as radial loads and axial loads.

Linear contact on the raceway and roller construction provides maximum rotational accuracy, high stability, and greater tilt rigidity.

The adjustable preload design extends bearing life, maximizes stiffness and provides minimal run-out.

The nylon spacer has a low inertia and a low running torque.

The parts are made of carburized steel or electroslag remelted bearing steel, which has good impact resistance. Precision rotary indexing table for machine tools.

Vertical and horizontal boring machines.

Vertical grinding machines Rotary surface grinding machines Large gear hobbing machines Gun and radar rotary tables Large radio and optical telescopes Rotating cameras Steering pivots and casters Height-constrained pivot microscope tables Rod center pivot pivot Rotating bogies Welding brackets Rotary assembly fixtures Industrial robots Precision rotary tables Medical devices Measuring instruments IC manufacturing equipment.

Crossed roller bearings are easy to install because the split inner or outer rings are fixed with the crossed roller collar after the roller and spacer keepers are installed to prevent separation from each other. Since the rollers are crossed, only one set of crossed roller collars can withstand loads in all directions, and the rigidity is 3 to 4 times higher than that of conventional models. At the same time, because the inner and outer rings of crossed roller bearings are divided into two parts, the bearing clearance can be adjusted, and high-precision rotational motion can be obtained even when a preload is applied.

1. It has excellent rotation accuracy.

The internal structure of the crossed roller bearing adopts the rollers to be arranged vertically at 90° with each other, and the rollers are equipped with spacer holders or isolation blocks to prevent the rollers from grinding against each other due to the tilt of the rollers. In addition, there is no contact or locking of one side of the roller; At the same time, because the inner and outer rings are a split structure, the gap can be adjusted, and high-precision rotary motion can be obtained even when preload is applied.

2. Simplified operation and installation.

The outer and inner rings, which are divided into two parts, are attached to the rollers and retainers and are fixed together, so installation is very simple.

3. Bear large axial and radial loads.

This is because the rollers are arranged perpendicular to each other by means of spacer holders on a V-grooved rolling surface at 90°.

4. Greatly save installation space.

The size of the inner and outer rings of crossed roller bearings has been minimized, and in particular, the ultra-thin structure is a compact size that is close to the limit and has high rigidity, so it is ideal for a wide range of applications, such as joints and rotating parts of industrial robots, rotary tables of machining centers, rotating parts of manipulators, precision rotary tables, medical instruments, measuring instruments, and IC manufacturing equipment.

5.High rotational speed capability.

Hello, I hope mine can help you. Double row crossed cylindrical roller bearings are suitable for heavy machinery and equipment subjected to large radial and axial loads, such as:

1.Hydroelectric generator sets.

2.Iron and steel metallurgical equipment.

3.Heavy machinery and equipment such as rolling bearing containers.

4.Cargo lifting equipment, bridge cranes and other large lifting equipment.

5.Aircraft and aircraft landing gear.

6.Railway vehicles, subway vehicles, urban rail transit vehicles.

7.Offshore oil drilling and production equipment.

8.Machine tools, plastic machinery, textile machinery and other industrial equipment. In short, double row crossed cylindrical roller bearings are widely used in the field of bearing support for large and heavy-duty machinery and equipment. Lu Mu and.

Common support bearings are:

1. Single-row ball slewing bearing.

The single-row four-point contact ball slewing ring is composed of two seat rings, which are compact in structure, light in weight, and the steel ball is in contact with the arc raceway at four points, which can bear the axial force, radial force and tipping moment at the same time. Construction machinery such as rotary conveyors, welding manipulators, small and medium-sized cranes and excavators can be selected.

2. Single-row crossed roller slewing ring.

Single-row cross roller slewing ring, composed of two seat rings, compact structure, light weight, high manufacturing precision, small assembly clearance, high requirements for installation accuracy, rollers are 1:1 cross arrangement, can bear axial force, tipping moment and large radial force at the same time, is widely used in lifting and transportation, construction machinery and military products.

3. Double volleyball slewing bearing.

The double-row ball type slewing ring has three seats, and the steel balls and isolation blocks can be directly discharged into the upper and lower raceways, and the upper and lower two rows of steel balls with different diameters are arranged according to the stress condition. This kind of open macro trap assembly is very convenient, and the bearing angle of the upper and lower arc raceways are both.

It is 90° and can withstand large axial forces and tipping moments. When the radial force is greater than the axial force, the raceway must be specially designed.

Materials used. 1. Materials for ferrules and rolling elements.

In general, the slewing ring bearing ring is made of surface hardened steel, when the user has no special requirements, it is generally made of 50mn steel, but sometimes in order to meet the needs of the host in some special applications, other grades of surface hardened steel can also be selected according to the specific use conditions provided by the user, such as 42crmo, 5crmnmo, etc.

2. Materials for cages.

Cages for slewing ring bearings are available in integral, segmented, and isolated block configurations. Among them, 20 steel is used for integral and segmented cages.

or ZL102 cast aluminum alloy manufacturing. With the continuous development of the material industry, nylon has also been popularized and applied in the design of segmented cages.

3. Materials for sealing rings.

The material used for the sealing ring of the slewing ring bearing is made of oil-resistant butadiene rubber. The code of the ferrule material and the state of the blank ** is according to the provisions of the table, the "t" in the table indicates that the ferrule blank is in the quenched and tempered state**, and "z" indicates that the ferrule blank is in the normalized state**.

1.The roller and raceway are in line contact or trimmed down line contact, and the radial bearing capacity is large, which is suitable for bearing heavy loads and shock loads.

2.The coefficient of friction is small, suitable for high speed, and the ultimate speed is close to that of deep groove ball bearings.

3.N-type and N-type can move axially, can adapt to the change of the relative position of the shaft and the shell caused by thermal expansion or installation error, and can be used as a free end support.

4.The processing requirements for the shaft or housing bore are high, and the relative deviation of the axis of the outer ring after the bearing is installed should be strictly controlled to avoid the concentration of contact stress.

5.The inner or outer ring can be separated for easy installation and removal.

Tapered roller bearings are a kind of bearings with a wide range of applications, including mining equipment, medical equipment, factory machinery, etc. Tapered roller bearings refer to radial thrust rolling bearings with tapered rollers as rolling elements. There are two types: small cone angle and large cone angle.

The small cone angle mainly bears the radial and axial combined load based on the radial load, and is often used in pairs, installed in reverse, the inner and outer seat rings can be installed separately, and the radial and axial clearance can be adjusted in installation and use; According to different needs, Mobei provides you with more bearing knowledge. There are many different variant states, including multi-sealed double-row and four-row tapered roller bearings, personalized new design of bearings, changing the traditional design method of fully sealed bearings, and adopting a new type of sealing structure combining sealing and dustproof, so as to improve the sealing effect and improve the sealing performance. Compared with open structure bearings, the service life of multi-sealed double and four-row tapered roller bearings is increased by 20% and 40%; Lubricant consumption is reduced by 80%.

1. A double-row inner ring, two single outer rings, and an outer ring spacer, the clearance is by the spacer, which is set by the manufacturer, and you should ask what the clearance is when you choose the type;

2. A double-row outer ring, two single inner rings, and an inner ring spacer ring, the clearance is the same as that set by the manufacturer; You can ask for how much clearance you want, or directly ask the manufacturer to choose for you;

3. Two single outer rings, two single inner rings, the spacer is uncertain (it may be outside, it may be inside, it may also be both inside and outside), in fact, it is a double column composed of two single columns, and the clearance also depends on the spacer, which is set by the manufacturer.

4. If there is no spacer ring, see that there is a bolt-like bulge on the end face of the outer ring on the real thing, ranging from 6-8, and there is a spring inside, which depends on the preload of the on-site installation and end cover to control the clearance.

5. There is also no spacer ring, and there is no spring protrusion, but there is a spring on the end cover, and the preload is also adjusted during installation. What structure you want depends on your design, your speed, bearing capacity, inner ring clamping, or outer ring clamping, etc.

In general, the tapered angle of the raceway of the outer ring of a single row tapered roller bearing is between 10° and 19° and is able to withstand the combined action of both axial and radial loads. The larger the cone angle, the greater the ability to withstand axial loads. Bearings with large tapered angles, with a posterior code plus B, with a tapered angle between 25° and 29°, can withstand large axial loads.

In addition, single row tapered roller bearings allow the clearance to be adjusted during installation.