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A complete list of bearing types, the types are beyond your imagination

2021-08-30

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 greater than 5mm), so the radial structure is compact, and its inner diameter and load capacity are the same as other types of bearings. The smallest diameter, especially suitable for supporting structures with restricted radial installation dimensions. Needle roller bearings can be used without inner ring bearings or needle roller and cage assemblies according to different applications. At this time, the journal surface and housing that match the bearing can be selected. The hole surface is directly used as the inner and outer rolling surface of the bearing. To ensure the load capacity and running performance are the same as the bearing with ring, the hardness, machining accuracy and surface quality of the raceway surface of the shaft or housing hole should be combined with the bearing ring. The needle bearing is a bearing unit composed of a radial needle roller bearing and a thrust bearing component. It has a compact structure and small volume, high rotation accuracy, and can bear a certain axial load while bearing 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.



Self-aligning ball bearing
Self-aligning ball bearing: between the inner ring of the two raceways and the outer ring of the spherical raceway, a bearing equipped with drum-shaped rollers. The curvature center of the outer ring raceway surface is consistent with the bearing center, so it has the same centering function as the self-aligning ball bearing. When the shaft or housing is deflected, it can be adjusted automatically without increasing the bearing burden. Spherical roller bearings can bear radial load and axial load in two directions. Self-aligning ball bearings have a large radial load capacity and are suitable for heavy loads and shock loads. The inner diameter of the inner ring is a bearing with a tapered bore, which can be directly installed. Or use an adapter sleeve or a disassembly tube to install it on the cylindrical shaft. The cage is made of steel 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 industries and general machinery, etc.



Deep groove ball bearing
Working principle: Deep groove ball bearings mainly bear radial load, and can also bear radial load and axial load at the same time. When it only bears radial load, the contact angle is zero. When the deep groove ball bearing has a large radial clearance, it has the performance of an angular contact bearing and can bear a large axial load. The friction coefficient of the deep groove ball bearing is very small and the limit speed is also high.
The deep groove continuous uninterrupted raceway of SKF deep groove ball bearings. There is a very good degree of closeness between the raceway and the steel ball, which can make the bearing bear bidirectional radial and axial loads. This type of bearing has a wide range of uses, and the design is extremely simple. It is inseparable. It is suitable for high-speed and ultra-high-speed environments. It runs stably. From the perspective of maintenance, it basically does not require any maintenance. And deep groove ball bearing is also the most widely used bearing type. Therefore, SKF also provides bearings with a variety of designs, varieties, series and sizes. SKF deep groove ball bearings are suitable for shaft diameters ranging from 3 to 1500 mm. They are supplied in three performance levels:
SKF high-quality standard bearings
SKF Explorer Bearing for high load capacity [1]
SKF energy-saving energy-efficient (E2) bearings
SKF also produces engineered solutions for specific applications, including the following:
SKF bearings for extreme temperatures
SKF DryLube bearings
SKF solid oil bearings
SKF insulated bearings
SKF polymer bearings
SKF NoWear never wear bearings
SKF sensor bearing unit



Spherical roller bearing
Spherical roller bearings are bearings with drum-shaped rollers assembled between the inner ring with two raceways and the outer ring with spherical raceways.
Spherical roller bearings have two rows of rollers, which mainly bear the load of one diameter, and can also bear the axial load in any direction. With high radial load capacity, it is especially suitable for working under heavy load or vibration load, but it cannot bear pure axial load. The outer ring raceway of this type of bearing is spherical, so its alignment performance is good, and it can compensate the concentricity error.
Spherical roller bearings have two rows of symmetrical spherical rollers, the outer ring has a common spherical raceway, and the inner ring has two raceways inclined at an angle to the bearing axis. It has good self-aligning performance. When the shaft is stressed The bearing can still be used normally when bent or installed out of center. The alignment varies with the bearing size series. Generally, the allowable alignment angle is 1~2.5 degrees. This type of bearing has a large load capacity, except for the radial load. The outer bearing can also withstand the axial load acting in both directions and has good impact resistance. Generally speaking, the allowable working speed of the spherical roller bearing is relatively low.
Double-row tapered roller bearings Spherical roller bearings are divided into two different structures: symmetrical spherical rollers and asymmetrical spherical rollers according to the cross-sectional shape of the rollers. Asymmetrical spherical roller bearings are early products, mainly for the main engine For maintenance services, symmetrical spherical roller bearings are rarely used in the new design of the main engine. The internal structure has undergone a comprehensive improvement design and parameter optimization. Compared with the earlier produced spherical roller bearings, it can withstand greater axial load. The operating temperature of this kind of bearing is low, so it can meet the requirements of higher speed. According to the inner ring with or without ribs and the cage used, it can be divided into two types: C-type and CA-type. The characteristic of C-type bearings is the inner ring. Without ribs and using steel stamping cages, CA type bearings are characterized by ribs on both sides of the inner ring and a car-made solid cage. In order to improve the lubrication of the bearing, the outer ring can be provided with an annular oil groove and The spherical roller bearing with three oil holes is represented by the bearing post code /W33. According to the requirements of users, spherical roller bearings with inner ring oil holes can also be supplied. In order to facilitate the customer's installation and replacement of the bearing, it can also be provided A spherical roller bearing bearing with a taper in the inner hole, the taper of the taper hole is 1:12, and the post code is K to indicate that, in order to meet the requirements of special users, a bearing with an inner hole taper of 1:30 can also be provided, and the post code is also available For bearings with a taper in the inner hole of K30, the bearing can be directly installed on the tapered journal with a lock nut, or the bearing can be installed on the cylindrical journal with the aid of an adapter sleeve or a withdrawal sleeve.
Thrust bearing is divided into two parts: tight ring and live ring. The tight ring and the shaft sleeve are tight, and the live ring is supported on the bearing seat. Rings and rolling elements are usually made of rolling bearing steel with high strength and good wear resistance, and the surface hardness after quenching should reach HRC60-65. The cage is mostly made of mild steel stamping, and it can also be made of copper alloy laminated bakelite or plastic.
Thrust roller bearing
The rolling element is the thrust rolling bearing of the roller.



Linear Bearings
Linear bearings are divided into metal linear bearings and plastic linear bearings
Metal linear bearing is a linear motion system produced at low cost, used in conjunction with a cylindrical shaft with an infinite stroke. Since the bearing ball is in point contact with the shaft, the use load is small. The steel ball rotates with very little frictional resistance, so that high-precision and smooth motion can be obtained.
Plastic linear bearing is a kind of linear motion system with self-lubricating characteristics. The biggest difference between metal linear bearing and metal linear bearing is that the metal linear bearing has rolling friction, and the bearing and the cylindrical shaft are in point contact, so this is suitable for low-load and high-speed movement; Plastic linear bearings have sliding friction, and there is surface contact between the bearing and the cylindrical shaft, so this is suitable for high-load, low-speed movement;
Thrust Cylindrical Roller Bearings Spherical roller bearing rolling elements are cylindrical roller thrust rolling bearings. Thrust tapered roller bearing: The rolling element is a thrust rolling bearing with tapered rollers.
Thrust needle roller bearings
The rolling elements are thrust rolling bearings with needle rollers.
Thrust spherical roller bearings
The rolling elements are self-aligning thrust rolling bearings with convex spherical or concave rollers. The raceway of the bearing race with convex spherical rollers is spherical, and the raceway of the bearing shaft with concave spherical rollers is spherical.
Bearing with seat
A component in which a radial bearing and a seat are combined. There is a base plate for mounting screws on a supporting surface parallel to the axis of the bearing.
Joint bearing
The sliding contact surface of thrust ball bearings is spherical, which is mainly suitable for spherical sliding bearings in oscillating motion, tilting motion and rotating motion.
Combined bearing
A set of bearings is a rolling bearing that is composed of two or more of the above-mentioned bearing structures at the same time. Such as needle roller and thrust cylindrical roller combined bearings, needle roller and thrust ball combined bearings, needle roller and angular contact ball combined bearings, etc.
Other bearings: Rolling bearings with structures other than those mentioned above.
Sliding bearings: Sliding bearings do not have inner and outer rings or rolling elements, and are generally made of wear-resistant materials. Commonly used in low-speed, heavy-duty, lubricating oil and mechanical rotating parts that are difficult to maintain.
Rolling Mill Bearing
Tapered roller bearing rolling mill bearings are generally only used to bear radial load. Compared with deep groove ball bearings of the same size, they have larger radial load capacity and the limit speed is close to that of deep groove ball bearings, but they are compatible with this type of bearing. The processing requirements of the shaft and the housing hole are relatively high, and the inclination of the axis of the inner ring and the axis of the outer ring is allowed to be small (2°-4°). If the two axes are inclined beyond the limit, the contact between the roller and the raceway of the ring will deteriorate. , Which seriously affects the load capacity of the bearing and reduces the service life of the bearing. Therefore, if this type of bearing needs to be installed in the host component that bears the axial load, it can only be used under the premise that other types of bearings are used to bear the axial load at the same time.



Angular contact ball bearings
The six types of bearings represented by 36 and 46 type bearings are generally used to refer to them. The angular contact is generally 15 degrees, 25 degrees, 45 degrees, and so on.
Types of outer spherical ball bearings
Bearing with seat outer spherical ball bearing
Spherical ball bearing with vertical seat
Spherical bearing with square seat
Outer spherical ball bearing with rhombus seat
Cylindrical outer spherical ball bearing with boss
Outer spherical ball bearing with ring seat
Outer spherical ball bearing with slider seat
Outer spherical ball bearing with suspension
Outer spherical ball bearing with suspension
Outer spherical ball bearing with adjustable diamond seat
Spherical ball bearing with stamped seat
Outer spherical ball bearings with other seats
Thrust angular contact ball bearings The contact angle of thrust angular contact ball bearings is generally 60°. Commonly used thrust angular contact ball bearings are generally two-way thrust angular contact ball bearings, which are mainly used for precision machine tool spindles and are generally used in conjunction with double row cylindrical roller bearings. , Can bear bidirectional axial load, has the advantages of high precision, good rigidity, low temperature rise, high speed, convenient assembly and disassembly, etc.