Detailed classification description of the hottest

Bearing classification description

bearing classification:

deep groove ball bearing

the most representative rolling bearing, which is widely used

can withstand radial load and bidirectional axial load

suitable for high-speed rotation and occasions requiring low noise and low vibration

sealed bearings with steel dust covers or rubber seals are pre filled with an appropriate amount of grease

bearings with stop rings or flanges on the outer ring, It is easy to locate axially and install in the shell.

the size of the maximum load bearing is the same as that of the standard bearing, but there is a filling groove in the inner and outer rings, which increases the number of balls installed and the rated load.

let's look at the cages that are mainly suitable for sun paper: steel plate punching cages (waveform, crown... Single row; S-shape... Double row)

copper alloy or phenolic resin cut cages Synthetic resin forming cage

main uses: Automotive: rear wheels, transmissions, electrical device components

electrical: General Motors, household appliances

others: instruments, internal combustion engines, construction machinery, railway vehicles, handling machinery, agricultural machinery, various industrial machinery

angular contact ball bearings

there is a contact angle between the ferrule and the ball, and the standard contact angle is 15 ° 30 ° and 40 °

the larger the contact angle is, the greater the axial load capacity is. Due to the differences between the counterparty and its core transaction terms on the issue of shares and the payment of cash to purchase assets.

the smaller the contact angle is, the more conducive it is to high-speed rotation.

single row bearings can bear radial load and one-way axial load

DB combination DF combination and double row bearing can bear radial load and two-way axial load

DT combination is suitable for occasions with large one-way axial load and insufficient rated load of a single bearing

ACh type bearing for high speed has small ball diameter and many balls, which is mostly used for machine tool spindle

angular contact ball bearing is suitable for high-speed and high-precision rotation

two single row angular contact ball bearings with back combination share inner ring and outer ring, It can bear radial load and two-way axial load

bearings without filling grooves also have sealed type

mainly applicable cages: steel plate stamping cages (bowl shaped... Single row; S-shaped, crown shaped... Double row) such prices are also quite cheap

copper alloy or phenolic resin cutting cages, synthetic resin forming cages

main uses: single row: machine tool spindle, high-frequency motor, gas turbine, centrifugal separator, front wheel of small cars Differential pinion shaft

double row: oil pump, roots blower, air compressor, various transmissions, fuel injection pump Printing machinery

four point contact ball bearing

can bear radial load and two-way axial load

a single bearing can replace the front combined or back combined angular contact ball bearing

suitable for bearing pure axial load or synthetic load with large axial load components

this kind of bearing can form one of the contact angles when bearing axial load in any direction（ α）， Therefore, the ferrule and the ball are always in contact on two sides and three knife points on any contact line

mainly applicable cage: copper alloy cut cage

main purpose: aircraft jet engine, gas turbine

self-aligning ball bearing

because the outer ring raceway surface is spherical, it has self-aligning performance, Therefore, it can automatically adjust the misalignment of the shaft axis caused by the deflection or misalignment of the shaft or housing

tapered hole bearings can be conveniently installed on the shaft by using fasteners

steel plate stamping cages: Daisy... 12, 13, 22... 2RS, 23... 2RS

sunflower... 22, 23

woodworking machinery, textile machinery transmission shafts, vertical self-aligning bearings with seats

cylindrical roller bearings

cylindrical rollers are in line contact with the raceway, and the radial load capacity is large, It is suitable for bearing heavy load and impact load, and also suitable for high-speed rotation. N-type and nu type can move axially, and can adapt to the change of the relative position between the shaft and the housing caused by thermal expansion or installation error. It is most suitable for free end bearings. NJ type and NF type can bear a certain degree of unidirectional axial load, NH type and NUP type can bear a certain degree of bidirectional axial load, and the inner ring or outer ring can be separated, It is easy to assemble and disassemble NNU type and NN type, which have strong rigidity against radial load, and are mostly used for machine tool spindles

main applicable cages: steel plate stamping cages (Z-shape), copper alloy cutting cages, pin cages, synthetic resin forming cages

main uses: medium and large motors, generators, internal combustion engines, gas turbines, machine tool spindles, speed reducers, handling machinery All kinds of industrial machinery

solid needle roller bearing

the basic structure of inner ring bearing is the same as Nu cylindrical roller bearing, but because of the use of needle roller, the volume can be reduced, and can withstand large radial load. Without inner ring bearing, the mounting surface of the shaft with appropriate accuracy and hardness should be used as the raceway surface

mainly applicable cage: steel plate stamping cage

main uses: automotive engine, transmission, pump Excavator crawler wheels, hoists, bridge cranes, compressors

tapered roller bearings

these bearings are equipped with cone-shaped rollers, which are guided by the large flange of the inner ring

in design, the top points of the inner ring raceway surface, the outer ring raceway surface and the conical surfaces of the roller rolling surface intersect at a point on the bearing centerline

single row bearings can bear radial load and unidirectional axial load, Double row bearing can bear radial load and bidirectional axial load

suitable for bearing heavy load and impact load

press contact chest（ α） The difference is divided into three types: small cone angle, medium cone angle and large cone angle. The larger the contact angle is, the greater the axial load capacity is.

the outer ring and inner assembly (inner ring and roller and cage assembly) can be separated, which is convenient for assembly and disassembly.

the product quality of bearing with auxiliary code "J" or "Jr" after setting Varieties are constantly improving, with international interchangeability

this kind of bearing also uses British series products

mainly applicable cages: steel plate stamping cages, synthetic resin forming cages, pin cages

main uses: Automobile: front wheel, rear wheel, transmission, differential pinion shaft. Machine tool spindle, construction machinery, large agricultural machinery, railway vehicle gear reducer, rolling mill roll neck and reducer

self aligning roller bearing

this kind of bearing is equipped with spherical rollers between the outer ring of the spherical raceway and the inner ring of the double raceway. According to the different internal structure, it is divided into four types: R, Rh, RHA and Sr

because the arc center of the outer ring raceway is consistent with the bearing center, it has self-aligning performance, Therefore, it can automatically adjust the misalignment of the axis caused by the deflection or misalignment of the shaft or housing

and can bear radial load and bidirectional axial load. In particular, the radial load capacity is large, which is suitable for bearing heavy loads and impact loads

tapered hole bearings. Through the use of fasteners or withdrawal sleeves, the assembly and disassembly of the shaft

tapered holes have the following two types (taper):

1:30 (auxiliary code: K30)... Suitable for 240 and 241 series

1:12 (auxiliary code: k)...... suitable for other series

the outer ring can be opened with oil holes, oil grooves and locating pin holes (one). Oil holes and oil grooves can also be set on the inner ring

mainly applicable cages: copper alloy cutting cages, steel plate stamping cages, pin cages, synthetic resin forming cages

main uses: paper machinery, reducer, railway vehicle axle, steel rolling mill gearbox seat, steel rolling mill roller track, crusher, vibrating screen, printing machinery, woodworking machinery, all kinds of industrial reducer Vertical self-aligning bearing with seat

thrust ball bearing

is composed of washer shaped raceway ring with raceway, ball and cage assembly

raceway ring matching with shaft is called shaft ring, and raceway ring matching with shell is called seat ring. The two-way bearing fits the middle ring with the secret shaft

the one-way bearing can bear the one-way axial load, and the two-way bearing can bear the two-way axial load (neither of them can bear the radial load)

mainly applicable cages: steel plate stamping cages, copper alloy or phenolic resin cutting cages, synthetic resin forming cages

main uses: automotive steering pins Machine tool spindle

thrust cylindrical roller bearing

is composed of washer shaped raceway ring (shaft ring, seat ring), cylindrical roller and cage components. Cylindrical rollers are processed with convex surface, so the pressure distribution between the roller and the raceway surface is uniform

it can bear unidirectional axial load

it has large axial load capacity and strong axial rigidity

mainly applicable cage: copper alloy cutting cage

main purpose: oil drilling rig, iron and steel machinery

thrust needle roller bearing

split bearing is composed of raceway ring, needle roller and cage components, It can be arbitrarily combined with the thin raceway ring (W) processed by stamping or the thick raceway ring (WS) processed by cutting

the non separable bearing is an integral bearing composed of the raceway ring processed by precision stamping and the components of the needle and cage

it can bear the unidirectional axial load

this kind of bearing takes up a small space and is conducive to the compact design of machinery

most of them only use the components of the needle and cage, The mounting surface of the shaft and shell is used as the raceway surface

mainly applicable cages: steel plate stamping cages, synthetic resin forming cages

main uses: speed change devices of automobiles, cultivators, machine tools, etc.

thrust tapered roller bearings

these bearings are equipped with round roller (the big end is spherical), The roller is accurately guided by the edge of the raceway ring (shaft ring, seat ring)

in design, the apex of the raceway surface of the shaft ring and seat ring and the conical surface of the roller rolling surface intersect at a point on the bearing centerline

one way bearing can bear one-way axial load, two-way bearing can bear two-way axial load

two way bearing fits the middle ring with the shaft, but due to the use of clearance fit, Therefore, it is necessary to use shaft sleeves and other cages for axial positioning of the middle ring: copper alloy cut cages

main uses: one way: Crane hooks, oil rig rotating rings

two way: rolling mill roll neck

thrust self-aligning roller bearings

the spherical rollers in this kind of bearings are arranged obliquely. Because the race surface is spherical and has self-aligning performance, the shaft can be allowed to have several inclinations

the axial load capacity is very large, It can bear several radial loads while bearing axial loads

oil lubrication is generally used

main applicable cages: copper alloy cutting cages

main uses: hydraulic generators, vertical motors, marine propeller shafts, steel rolling mills, reducers for rolling screws, tower cranes, coal mills, extruders, and forming machines