What are bearings and how many types are there?

Ball bearings or bearings are mechanical parts. used to support both radial and axial shafts Its main function is to support weight. and transfer the force generated from the shaft down to various equipment of rotating machinery Helps reduce friction or reduce friction (friction) during rotation. or postponement And there are other parts that can be replaced when they are worn or damaged, saving time and money. without having to change the shaft or gear Bearings are subject to a lot of friction. Will wear out quickly and must be lubricated with lubricant (lubricant) for smooth rotation. And check and replace when worn or damaged. There are two main types of ball bearings that are designed: Rolling-element Bearing and Plain bearing.

Bearing type

Bearing type

1. Roller bearings (Rolling-element bearing)

The components of ball bearings are as follows:

  • 🔴 Outer ring serves to support the ball bearing inside.
  • 🔴 Roller pellets (Ball or Roller) serve to support weight. and transferring the force generated from the spindle
  • 🔴 Inner ring (Inner ring) serves to prevent the rollers from coming into direct contact with the shaft.
  • 🔴 Separator or Retainer serves to set the distance between the rollers to have the same distance. and do not let the rollers touch each other
  • 🔴 Seal or Shield is used to prevent foreign matter from entering the bearing.

Roller bearings are classified according to the type of ball bearings inside them. Which can be divided into 2 main types as follows: ball bearings with internal ball bearings in a spherical shape (Ball Bearing) and ball bearings with internal ball bearings in a straight cylindrical or tapered cylindrical shape (Roller bearing).

1.1 Ball Bearing

Ball bearing type ball bearings are spherical bearings contained within. Moving between the outer ring and the inner ring, the beads of this bearing are made of solid metal. It serves to support movement and reduce friction between the shaft and the machine. It also helps increase the efficiency of rotation. Ball Bearings are commonly used to receive radial loads and can be used for high-speed applications.

Deep groove ball bearings

1.1.1 Deep groove ball bearings

It is a durable bearing. Have the qualifications and the ability to get around. Can be used at high rpm and easy to install. The deep groove ball bearings have an open cover for good heat dissipation. and a lid to prevent dust from entering There is also a double row deep groove ball type for heavy duty applications. Round beads made of stainless steel for work with high hot abrasive conditions. Models with a code ending in VA201, VA208, VA228 for use at temperatures up to 250-350 degrees Celsius.

1.1.2 Self-aligning double-row ball bearings

It is a ball bearing suitable for applications where misalignment or misalignment occurs. Available both without cover. and with lid Inside the bearing there is grease packed from the factory. There are also models with tapered holes for use with shaft adjusting sleeves installed in plummer block housings. Suitable for machines that require savings

Angular contact ball bearings

1.1.3 Angular contact ball bearings

It is a bearing designed to be suitable for bearing the combined axial loads caused by radial and axial loads simultaneously acting on the bearing. It is a bearing that increases the strength of the shaft and also helps to simplify the design of the machine. Because the bearings can position the place in two directions. Angular contact ball bearings are available both without cover. and dust cover It also includes four angular contact ball bearings that reduce the required bearing space in applications where axial and axial loads occur in both directions.

Spherical thrust ball bearings

1.1.4 Thrust ball bearings

The ball bearing consists of One shaft ring and two jacket rings and two sets of ball pellets with nests The bearing assembly is modular. Therefore, it is convenient to assemble and install. Because the two rings and roller set Can be installed independently

1.2 Cylindrical roller bearings (Roller bearing)

Roller bearings have cylindrical bearings packed inside. which moves between the upper and lower rings The pellets of this ball bearing are made of solid metal. Has the same function as Ball bearings, but Roller bearings are commonly used to receive axial force. which is stronger than spherical bearings

Cylindrical roller bearings

1.2.1 Cylindrical roller bearings

It is a ball bearing that can support a large amount of radial pressure. and pressure from the axial thrust Suitable for work that requires high revolutions. Helps reduce negative effects caused by shaft misalignment problems. Helps improve the ability to lubricate ball bearings.

Needle roller bearings

1.2.2 Needle roller bearings

It is a bearing with a small cross section. Suitable for work with a cross-sectional area For ball bearings with limited space or ball bearing installation designs that must be especially compact.

spherical roller bearings

1.2.3 Spherical roller bearings

It is a durable bearing. Capable of supporting shaft misalignment It has a long service life even under very high load conditions. It is a ball bearing that can be used both installed and used on a shaft adjustment sleeve. Or shaft sleeves are assembled into plummer block housings for economical bearing design and installation.

Tapered roller bearings

1.2.4 Tapered roller bearings

Designed to handle large total loads. Reduces the negative effects of shaft misalignment problems. Helps to last a long time. and is produced with high precision, reducing friction from torque

Thrust Spherical Roller Bearings

1.2.5 Thrust spherical roller bearings

It is strong and able to support misalignment. Therefore, the bearing can be used even if there is a shaft misalignment problem. Ball bearings are designed to be able to withstand high axial loads. and can receive radial force acting simultaneously It is a ball bearing that has a long service life even when used in harsh operating conditions. The bearings are designed to be separated. Helps make installation easy.

2. Plain bearings

plain bearings

It has an inner ring with a spherical outer diameter and an outer ring with a concave spherical inner surface. It is specially designed for ball bearing arrangements that require alignment between the shaft and housing. Or in the case of tilting or oscillating movements with relatively slow sliding speeds. This is usually used for jobs that carry a lot of extra weight.