Classification and use of bearings

Time:2020-04-14 16:48:22Hits:430
Shandong Aobo Bearing Co., Ltd., customized operation solutions for customers. The company specializes in the production of high quality, deep groove ball bearings, centering ball bearings, cylindrical roller bearings, centering roller bearings, needle b

 Shandong Aobo Bearing Co., Ltd.

customized operation solutions for customers.

The company specializes in the production of high quality, deep groove ball bearings, centering ball bearings, cylindrical roller bearings, centering roller bearings, needle bearings, angular contact bearings, tapered roller bearings, thrust ball bearings, joint bearings, outer ball bearings, with seat outer ball bearings, etc.

Deep Groove Ball Bearing

Deep groove ball bearings are the most representative rolling bearings. Compared with other types of bearings of the same size, this type of bearing has the lowest friction coefficient, high speed limit, simple structure, low manufacturing cost, high precision, no need for frequent maintenance, and large size and form. It is the most widely used type. Bearing. It is mainly subjected to radial loads and can also withstand certain axial loads. When it is only subjected to radial loads, the contact angle is zero.

After the deep groove ball bearing is mounted on the shaft, the axial displacement of the shaft or the casing can be restricted within the axial clearance of the bearing, so that the axial positioning can be performed in both directions. When the deep groove ball bearing has a large radial clearance, it has the performance of an angular contact bearing and can withstand a large axial load. Deep groove ball bearings are superior to thrust ball bearings in high-speed operating conditions with large axial loads. In addition, this type of bearing also has a certain ability to adjust the core. When it is inclined 2'~10' with respect to the hole of the housing, it can still work normally, but it has certain influence on the bearing life.


Self-aligning Ball Bearings

The self-aligning ball bearing is a bearing in which an inner ring of two raceways and an outer ring of a spherical race are fitted with spherical balls. The center of curvature of the raceway surface of the outer ring is identical to the center of the bearing, so it has the same self-aligning function as the self-aligning ball bearing. When the shaft and outer casing are deflected, it can be adjusted automatically without increasing the bearing load. Spherical roller bearings can withstand radial loads and axial loads in both directions. The self-aligning ball bearing has a large radial load capacity and is suitable for heavy load and impact load. The inner ring inner diameter is a tapered bore bearing that can be mounted directly. Or use the adapter sleeve and the removal cylinder to mount on the cylindrical shaft. The cage is made of sheet metal stamping cage and polyamide forming. Self-aligning ball bearings are suitable for bearing heavy loads and impact loads, precision instruments, low noise motors, automobiles, motorcycles, metallurgy, rolling mills, mining, petroleum, paper, cement, and press. Sugar and other industries and general machinery.

Cylindrical Roller Bearing

The rolling element is a radial rolling bearing of a cylindrical roller. The internal structure of the cylindrical roller bearing is arranged in parallel by rollers, and spacers or spacers are arranged between the rollers to prevent the rollers from tilting or friction between the rollers, thereby effectively preventing an increase in the rotational torque.

Cylindrical rollers and raceways are line contact bearings. Load capacity, mainly bear radial load. The rolling element has little friction with the ferrule rib and is suitable for high speed rotation. According to the ferrule with or without ribs, it can be divided into single row cylindrical roller bearings such as NU, NJ, NUP, N, NF, and double row cylindrical roller bearings such as NNU and NN. The bearing is a structure in which the inner ring and the outer ring are separable.

Cylindrical roller bearings with no ribs on the inner or outer ring, the inner and outer rings can move relative to the axial direction, so they can be used as free end bearings. A cylindrical roller bearing with a single rib on one side of the inner and outer rings and a single rib on the other side can withstand a certain degree of axial load in one direction. Steel stamping cages or copper alloy solid cages are commonly used. However, some use polyamide shaped cages.


Commonly used in large and medium-sized motors, rolling stock, machine tool spindles, internal combustion engines, generators, gas turbines, gearboxes, rolling mills, vibrating screens, and lifting and transport machinery.

Spherical Roller Bearings

Spherical roller bearings have two rows of symmetrical spherical rollers that are primarily subjected to radial loads and can also withstand axial loads in either direction, but cannot withstand pure axial loads. The outer ring raceway of this type of bearing is spherical, so its self-aligning performance is good, and the coaxiality error can be compensated. When the shaft is bent or installed with different cores, the bearing can still be used normally. The self-aligning function varies with the bearing size series. Generally, the allowable centering angle is 1~2.5 degrees. The bearing capacity of this type of bearing is large. In addition to being able to withstand the radial load, the bearing can also bear the axial load of two-way action, and has better impact resistance. In other words, spherical roller bearings allow for lower operating speeds. Suitable for working under heavy or vibration loads.

Angular Contact Ball Bearings

Generally referred to as the 36 type bearing represented by 36, 46 type bearings, the angular contact is generally 15 degrees, 25 degrees, 45 degrees and so on. Divided into single row angular contact ball bearings and double row angular contact ball bearings.

Angular Contact Ball Bearings can withstand both radial and axial loads. Can work at higher speeds. The larger the contact angle, the higher the axial load carrying capacity. High precision and high speed bearings typically take a 15 degree contact angle. Under the axial force, the contact angle will increase.

The main purpose

Single row angular contact ball bearings: machine tool spindle, high frequency motor, gas turbine, centrifugal separator, small car front wheel, differential pinion shaft, booster pump, drilling platform, food machinery, indexing head, repair welding machine, Low noise cooling tower, electromechanical equipment, painting equipment, machine slot plate, arc welder.

Double row angular contact ball bearings: oil pump, Roots blower, air compressor, various transmissions, fuel injection pumps, printing machinery, planetary reducers, extraction equipment, cycloid reducers, food packaging machinery, electric welding machines, electric soldering irons, Square box, gravity spray gun, stripping machine, half shaft, inspection and analysis equipment, fine chemical machinery.

Conical Roller Bearing

Tapered roller bearings are separate bearings, and the inner and outer rings of the bearing have tapered raceways. This type of bearing is divided into different structural types such as single row, double row and four row tapered roller bearings according to the number of rows of rollers installed. Single row tapered roller bearings can withstand radial loads and axial loads in a single direction. When the bearing is subjected to a radial load, an axial component will be generated, so that another bearing that can withstand the axial force in the opposite direction is needed to balance.

 Tapered roller bearings are widely used in automobiles, rolling mills, mining, metallurgy, plastic machinery and other industries.

Thrust Ball Bearing

Thrust ball bearings are divided into one-way and two-way. They can only withstand axial loads and must not withstand any radial loads. The thrust bearing is divided into two parts: a tight ring and a live ring. The tight ring and the sleeve are tight, and the ring is supported on the bearing housing. The ferrule and the rolling element are usually made of rolling bearing steel with high strength and good wear resistance. The surface hardness after quenching should reach HRC60-65. The cage is made of soft steel stamping, and can also be made of copper alloy cloth bakelite or plastic.

Thrust Roller Bearing

Including thrust cylindrical roller bearings, thrust tapered roller bearings, thrust needle roller bearings and thrust spherical roller bearings.

Thrust roller bearings are used to support axial and radial combined loads with axial loads, but radial loads must not exceed 55% of axial loads. Compared with other thrust roller bearings, this type of bearing has a low friction factor, a high rotational speed, and has a self-aligning performance.

Product features: large rigidity, small axial space

Product use: high power marine gearbox

Advantages: with self-aligning performance

Category: Machinery

Thrust cylindrical roller bearings are mainly used in heavy machinery, high power marine gearboxes, oil rigs, vertical motors and other machinery.

Needle Bearing

Needle roller bearings are equipped with thin and long rollers (the length of the roller is 3~10 times the diameter and the diameter is generally not more than 5mm), so the radial structure is compact, and the inner diameter and load capacity are the same as other types of bearings. The smallest diameter, especially suitable for radial mounting size limited support structure. Needle roller bearings can be selected according to different applications, the inner ringless bearing or needle roller and cage assembly, the journal surface and outer casing matched with the bearing The surface of the hole directly acts as the inner and outer rolling surface of the bearing. To ensure the load capacity and running performance is the same as that of the ferrule bearing, the hardness of the raceway surface of the shaft or the outer casing hole, the machining accuracy and the surface quality should be combined with the bearing ring. The needle bearing is a bearing unit composed of a combination of a radial needle roller bearing and a thrust bearing component. The compact structure is small in size, high in rotation precision, and can withstand a certain axial load while being subjected to a high radial load. And the product structure is diverse, adaptable and easy to install. Combined needle roller bearings are widely used in various mechanical equipment such as machine tools, metallurgical machinery, textile machinery and printing machinery, and can make the mechanical system design very compact and dexterous.

Radial insert ball bearing and pillowcase bearing

The outer diameter of the outer ring of the outer spherical ball bearing is spherical, which can serve as a centering function. An assembly of a radial bearing and a seat having a mounting plate on a support surface parallel to the bearing axis.

Flange Bearing

The flange bearing has a flanged flange on the outer wheel. The feature is that it can simplify the mainframe structure, reduce the size of the mainframe, and make the bearing easier to position.

Linear Bearings

Linear bearings are divided into metal linear bearings and plastic linear bearings.

Metal linear bearings are linear motion systems that are produced at low cost for use with infinite strokes in conjunction with cylindrical shafts. Since the carrier ball is in point contact with the shaft, the load used is small. The steel ball rotates with a very small frictional resistance, so that smooth motion with high precision can be obtained.

The plastic linear bearing is a self-lubricating linear motion system. The biggest difference between the metal linear bearing is that the metal linear bearing is rolling friction, and the bearing is in point contact with the cylindrical shaft, so this is suitable for low-load high-speed motion; The plastic linear bearing is sliding friction, and the bearing is in surface contact with the cylindrical shaft, so this is suitable for high-speed medium-low speed movement.

Crossed roller bearing

The crossed roller bearing is a special type of bearing with inner ring splitting and outer ring rotation. Since the divided inner ring or outer ring is fixed to the cross roller collar after being loaded into the roller and the spacer, to prevent separation from each other, the operation is simple when the cross roller collar is installed. Since the rollers are arranged in a cross arrangement, only one set of crossed roller collars can withstand loads in all directions, and the rigidity is increased by 3 to 4 times compared with the conventional model. At the same time, since the inner ring or the outer ring of the crossed roller bearing has a two-divided structure, the bearing clearance can be adjusted, and even if a preload is applied, a high-precision rotational motion can be obtained. Moreover, due to its special structure, it is commonly used as a joint bearing in industrial robots.

In the cross roller bearing, since the cylindrical rollers are vertically aligned with each other through the spacer, one cross roller bearing can withstand loads in all directions such as radial load, axial load, and moment load. The size of the inner and outer rings is miniaturized to a minimum, and the extremely thin type is a small size close to the limit and has high rigidity, so it is most suitable for a joint portion or a rotating portion of an industrial robot, a rotary table of a machining center, Robot rotating parts, precision rotary tables, medical equipment, gauges, IC manufacturing equipment, etc.