1. The "axis" and rotating support parts that reduce friction will definitely experience friction. Bearings are used between the rotating "shaft" and the rotating support part.

Bearings can reduce friction, make rotation smoother, and reduce energy consumption. This is the maximum function of bearings.

2. There will be a significant force between the axis that protects the rotation support part and the rotation support part. Bearings can prevent damage to the rotating support portion due to this force, keeping the rotating "shaft" in the correct position. It is precisely because of these functions of bearings that we can use the machine repeatedly for a long time.

The purpose of bearings in automobiles: rear wheels, transmissions, electrical components. Electrical: General electric motors, household appliances. Instruments, internal combustion engines, construction machinery, railway vehicles, loading and unloading machinery, and various industrial machinery. Machine tool spindle, agricultural machinery, high-frequency motor, gas turbine, centrifugal separator, small car front wheel, differential small gear shaft.

What material is the bearing made of

1. Ceramic bearings, due to their superior performance that metal bearings cannot match, are at the forefront of the new materials world in terms of high temperature resistance, ultra strength, and more.

2. Plastic bearings can generally be divided into plastic rolling bearings and plastic sliding bearings; The working principle of plastic rolling bearings and plastic sliding bearings can be distinguished by their names. The friction that occurs during the operation of plastic rolling bearings is rolling friction.

3. Nylon bearings are a low-cost and low friction material with strong self-lubricating properties. Graphite and other fillers are often added to increase self-lubricating properties, strength, and stiffness. The working temperature can reach 120 ° C.

Types of bearings

1. Sliding bearings do not distinguish between inner and outer rings or rolling elements, and are generally made of wear-resistant materials. Commonly used for low-speed, light load lubrication and difficult to maintain mechanical rotating parts.

2. The sliding contact surface of a joint bearing is spherical, mainly suitable for swing motion, tilt motion, and rotational motion.

3. Rolling bearings generally consist of four parts: inner ring, outer ring, rolling element, and retainer. The function of the inner ring is to match and rotate with the shaft; The function of the outer ring is to cooperate with the bearing seat and provide support.

The size series code of the bearing is composed of the width (height) series code and the diameter series code of the bearing.

1. The diameter series refers to the outer diameter size series corresponding to the same bearing inner diameter. There are diameter series with increasing outer diameter sizes of 7, 8, 9, 0, 1, 2, 3, 4, and 5, respectively.

2. The width series refers to the width dimension series corresponding to the same bearing diameter series. There are width series with increasing width dimensions such as 8, 0, 1, 2, 3, 4, 5, and 6.

3. The thrust bearing corresponds to the width series of the radial bearing with a height series, consisting of four height series with increasing height dimensions such as 7, 9, 1, and 2.

Structure of bearings

1. Inner ring (also known as inner sleeve or inner ring): usually fixed on the shaft neck, the inner ring rotates together with the shaft. There are grooves on the outer surface of the inner ring for steel balls or rollers to roll, called inner grooves or inner raceways.

2. Outer ring (also known as outer sleeve or outer ring): usually fixed on the bearing seat or the shell of the machine, serving to support the rolling element. There are also grooves on the inner surface of the outer ring for steel balls or rollers to roll, called inner grooves or inner raceways.

3. Rolling element (steel ball or roller): Each set of bearings is equipped with one or several sets of rolling elements, which are installed between the inner and outer rings and play a role in transmitting rolling forces.