Bearing Introduction:

Bearing (bearing) is a mechanical fixed parts. When other parts on the shaft water lubrication sleeve relative movement between each other, used to maintain the center of the shaft position and the control of the movement of the machine, it is called the bearing. The part that supports a relatively rotating shaft is called a bearing. Normally, the shaft is rotated. There are also shafts that rotate without rotation of the housing, such as automotive hub bearings. Bearing is divided into rolling bearings and plain bearings.
Bearing

Bearing type difference

Angular contact bearings: ball and ferrule nominal contact angle greater than 0 °, while the small copper-based ball retainer ring at 90 ° of the rolling bearing. Can bear radial load and axial load simultaneously. Can work at higher speed. The larger the contact angle, the higher the axial bearing capacity. High-precision and high-speed bearings are usually 15 degrees contact angle.
In the axial force, the contact angle will increase. Single row angular contact ball bearings only to the oil to withstand one direction of the axial load bearing in the radial load will cause additional axial force. And can only limit the axial displacement of the shaft or the housing in one direction. If the pair of double-mounted, so that the outer ring of a pair of bearings relative to the wide end face wide end face, narrow end face narrow end face. This avoids additional axial forces and limits the shaft or housing to axial play in both directions.
Spherical Bearings: Spherical roller bearings and wide inner ring with locking element to the heart. Mainly for simple shell use.

Linear motion bearings: two raceways in the rolling direction has a relative linear motion of the rolling bearing.

Ball bearings: Rolling ball bearings.

Deep Groove Ball Bearings: Each ring has a cross-section of about one-third of the circumference of the ball Groove continuous radial groove ball bearings for precision instruments, low noise motors, automobiles, motorcycles and general machinery Etc., is the most widely used type of bearing in the machinery industry. Simple structure, easy to use and maintain. Mainly used to bear radial load, but also can withstand a certain degree of axial load, when the radial clearance of the bearing increases, the performance of angular contact ball bearings can withstand greater axial bearing load. This type of bearing friction coefficient is small, high speed limit, the size range and form changes. Robust, versatile and low-noise operation, it operates at high speeds and is easy to install. Single row deep groove ball bearings another sealed design, you can no longer need lubrication and maintenance. Single-row with ball-point notches and double row ball bearings, suitable for heavy duty conditions.

Thrust ball bearings: Rolling ball thrust ball bearings.

Roller bearings: Rolling elements are roller bearings.

Cylindrical Roller Bearings: Rolling cylindrical roller bearings to the heart, a separate type bearings, installation and removal is very convenient. Cylindrical roller bearings are divided into single row, double row and four columns. Cylindrical roller bearings can be divided into single-row, double-row and multi-row cylindrical roller bearings according to the different number of roller bearings installed. Which is more used is a cage with single row cylindrical roller bearings. In addition, there are other single or double row full complement roller bearings and other structures.

Single row cylindrical roller bearings according to the ring is divided into different N-type, NU type, NJ type, NF type and NUP type. Cylindrical roller bearings bear the radial load capacity, according to the structure of the ring flange can withstand a certain one-way or two-way axial load. NN-type and NNU-type double row cylindrical roller bearings compact structure, strong rigidity, carrying capacity, small deformation after load, mostly used for machine tool spindle support. FC, FCD, FCDP four-row cylindrical roller bearings can withstand large radial loads, and more for heavy machinery such as rolling mill. Cylindrical roller bearings are mainly used in motors, machine tools, petroleum, rolling mill handling machinery and various types of industrial machinery.

Tapered roller bearings: Rolling elements are tapered roller bearings to the heart.
Needle roller bearings: rolling element is the needle roller bearings to the heart.
Spherical roller bearings: rolling body is convex spherical spherical roller or spherical self-aligning roller bearings. A convex spherical roller bearings, the outer ring has a spherical raceway; concave roller bearings, the inner ring has a spherical raceway.
Thrust Roller Bearings: Rolling elements are roller thrust bearings.
Thrust cylindrical roller bearings: The rolling element is a cylindrical roller thrust roller bearing.
Thrust tapered roller bearings: Rolling elements are tapered roller thrust bearings.
Thrust needle roller bearings: Rolling needle roller thrust bearings.
Thrust spherical roller bearings: rolling body is spherical or concave roller aligning thrust roller bearings. A spherical roller bearing raceway raceway spherical, concave spherical roller bearing ring raceway spherical.
Bearings with bearings: Radial bearings and seat combination of a component, bearing shaft in parallel with the bearing surface has a mounting screw on the floor.
Spherical plain bearings: The sliding contact surfaces are spherical. They are mainly suitable for spherical plain bearings with oscillating, tilting and rotating motions.
Combined bearings: a set of bearings at the same time by the above two kinds of bearing structure form a combination of rolling bearings. Such as needle roller and thrust cylindrical roller bearings, needle roller and thrust ball bearings, needle roller and angular contact ball bearings.
Other bearings: In addition to the above structure other than the rolling bearing.
Sliding Bearings: Sliding Bearings Regardless of the inner and outer rings and no rolling bodies, they are generally made of a wear-resistant material. Commonly used in low-speed, heavy-duty and filling lubricants and maintenance of mechanical rotating parts.
Rolling mill bearings: Rolling mill bearings are generally only used to bear the radial load, and the same size than the deep groove ball bearings, a larger radial load capacity, speed limit close to deep groove ball bearings, but with such bearings with the shaft ﹑ Shell hole processing requirements are high, allowing the inner ring axis and the outer ring axis inclination is very small (2 ° -4 °), two axis tilt such as beyond the limit, the roller and the raceway ring contact conditions will deteriorate, Seriously affect the bearing capacity of the load and reduce bearing life. Therefore, such bearings need to be installed in the axial load acting on the host components, only with other types of bearings to withstand axial load under the premise of only be used.