Types of Bearings | Uses & Working Mechanisms Explained (2022)

From a small supermarket trolley to huge power plants, a great number of light-duty, as well as industrial equipment, could not function without the use of bearings in some form.

Bearings are a crucial tribological component of many types of machinery and exist in a variety of forms and shapes. They can be defined as a machine elementthat supports/permits only a specific type of motion (restriction of degrees of freedom) in a system that may be under static or dynamic loading.

An example is a sliding door. The door cannot be lifted or removed from its place. It only permits sliding to open it. The possible movement is restricted to sliding motion by bearings.

Table of Contents hide

I What Is the Purpose of Bearings?

II Rolling Element Bearings

III Ball Bearings

IV Roller Bearings

V Plain Bearings

VI Fluid Bearings

(Video) How do ball and roller bearings work? Types and durability calculation. DIN ISO 281

VII Magnetic Bearings

What Is the Purpose of Bearings?

The main purpose of bearings is to prevent direct metal to metal contact between two elements that are in relative motion. This prevents friction, heat generation and ultimately, the wear and tear of parts. It also reduces energy consumption as sliding motion is replaced with low friction rolling.

They also transmit the load of the rotating element to the housing. This load may be radial, axial, or a combination of both. A bearing also restricts freedom of movement of moving parts to predefined directions as discussed above.

Rolling Element Bearings

Rolling element bearings contain rolling elements in the shape of balls or cylinders. We know that it is easier to roll a wheel than slide it on the ground as the magnitude of rolling friction is lower than sliding friction. The same principle is in work here. Rolling element bearings are used to facilitate the free movement of parts in rotational motion.

Even when we need linear motion in applications, it is easy to convert rotational motion to sliding motion. Consider an escalator or a conveyor. Even though the motion is linear, it is powered by rollers that are driven by motors.

Another example is a reciprocating pump that can convert rotational energy from a motor into translational motion with the help of linkages. In each of these applications, ball bearings are used to support motor shafts as well as shafts of other rollers in the assembly.

Rolling elements carry the load without much friction as the sliding friction is replaced with rolling friction. Rolling element bearings can be subdivided into two major types: ball bearings and roller bearings.

Ball Bearings

Ball bearings are one of the most common types of bearing classes used. It consists of a row of balls as rolling elements. They are trapped between two annulus shaped metal pieces. These metal pieces are known as races. The inner race is free to rotate while the outer race is stationary.

Ball bearings provide very low friction during rolling but have limited load-carrying capacity. This is because of the small area of contact between the balls and the races. They can support axial loads in two directions besides radial loads.

Ball bearings are used for controlling oscillatory and rotational motion. For example, in electrical motors where the shaft is free to rotate but the motor housing is not, ball bearings are used to connect the shaft to the motor housing.

Depending on the application, different types of ball bearings are available to choose from.

Advantages of ball bearings:

  • Good wear resistance
  • Do not need much lubrication
  • Provide low friction, thus little energy loss
  • Long service life
  • Easy to replace
  • Small general dimensions
  • Comparatively cheap
  • Can handle thrust loads

Disadvantages of ball bearings:

  • May break due to shocks
  • Can be quite loud
  • Cannot handle large weights

Deep Groove Ball Bearings

Types of Bearings | Uses & Working Mechanisms Explained (1)

This is the most widely used ball bearing type. Trapped between the two races is a ring of balls that transmit the load and allows rotational motion between the two races. The balls are held in place by a retainer.

They have very low rolling friction and are optimized for low noise and low vibration. This makes them ideal for high-speed applications.

They are comparatively easy to install and require minimal maintenance. Care must be taken during installation to prevent denting of the races as they have to be push fit onto shafts.

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(Video) Types of bearing, Bearing working animation bearing Types

Angular Contact Ball Bearings

Types of Bearings | Uses & Working Mechanisms Explained (5)

In this ball bearing type, the inner and outer races are displaced with respect to each other along the bearing axis. This type is designed to handle greater amounts of axial loads in both directions in addition to radial loads.

Due to the shift in the inner and outer races, the axial load can be transferred through the bearing to the housing. This bearing is suitable for applications where rigid axial guidance is required.

Angular contact bearings are widely used in agricultural equipment, automobiles, gearboxes, pumps, and other high-speed applications.

Self-Aligning Ball Bearings

Types of Bearings | Uses & Working Mechanisms Explained (6)

This type of ball bearing is immune to misalignment between the shaft and the housing which may happen due to shaft deflection or mounting errors.

The inner ring has deep grooves similar to deep groove ball bearings followed by two rows of balls and the outer ring. The outer ring has a concave shape and this grants the inner ring some freedom to rearrange itself depending on the misalignment.

Thrust Ball Bearings

Types of Bearings | Uses & Working Mechanisms Explained (7)

Thrust ball bearings are a special type of ball bearings designed specifically for axial loads. They cannot sustain radial loads at all.

Thrust ball bearings exhibit low noise, smooth operation and are capable of high-speed applications.

They are available as single direction or double direction bearings and the selection relies on whether the load is unidirectional or bidirectional.

When to Use Ball Bearings?

So let’s outline some of the working conditions that may require a ball bearing.

  1. Thrust loads are present. Ball bearings’ design makes them capable of withstanding axial loads.
  2. No heavy loads. Due to having ball-shaped rolling elements, the bearings concentrate all the force onto a few points of contact. This can result in early failure with high loads.
  3. High speeds. The ball bearing’s small point of contact also means less friction. So there is less resistance to overcome and thus it is easier to achieve high speeds with these types of bearings.

Roller Bearings

Roller bearings contain cylindrical rolling elements instead of balls as load carrying elements between the races. An element is considered a roller if its length is longer than its diameter (even if only slightly). Since they are in line contact with the inner and outer races (instead of point contact as in the case of ball bearings), they can support greater loading.

Roller bearings are also available in various types. The appropriate type may be selected after considering the type and magnitude of loading, service conditions, and the possibility of misalignment among other factors.

Advantages of roller bearings:

  • Easy maintenance
  • Low friction
  • Can take high radial loads
  • Tapered roller bearings can withstand high axial loads
  • Great accuracy
  • Used to adjust axial displacement
  • Low vibrations

Disadvantages of roller bearings:

(Video) How Ball Bearings Work (Engineering)

  • Noisy
  • Quite expensive

Cylindrical Roller Bearings

Types of Bearings | Uses & Working Mechanisms Explained (8)

These are the simplest of the roller bearings family. These bearings can face the challenges of heavy radial loading and high speed. They also offer excellent stiffness, axial load transmission, low friction, and a long service duration.

The load capacity can be increased further by obviating the use of cages or retainers that are usually in place to hold the cylindrical rollers. This permits the fitting of more rollers to carry the load.

They are available as single row, double row and four-row types. They also come in split and sealed variants.

Split variants are used for areas that are difficult to access such as engine crankshafts. In sealed variants, the bearing contamination is prevented and the lubricant is retained making it a maintenance-free option.

Spherical Roller Bearings

Types of Bearings | Uses & Working Mechanisms Explained (9)

Heavy radial and axial loads can be a greater challenge when the shaft is prone to misalignment.

This situation can be handled very well by spherical roller bearings. They have high load carrying capacities and can manage misalignment between the shaft and housing. This reduces maintenance cost and improves service life.

Spherical roller bearing raceways are inclined at an angle to the bearing axis. Instead of straight sides, the rollers have spherical sides that fit onto the spherical raceways and accommodate small misalignments.

Spherical roller bearings have a wide range of use-cases. They are used in applications where heavy loads, moderate to high speeds and possible misalignment occur. Some example uses are off-road vehicles, pumps, mechanical fans, marine propulsion, wind turbines, and gearboxes.

Tapered Roller Bearings

Types of Bearings | Uses & Working Mechanisms Explained (10)

The tapered roller bearing contains sections of a cone as a load-carrying element. These rollers fit between the two races that are also sections of a hollow cone. If the races and the axes of rollers were extended, they would all meet at a common point.

Tapered roller bearings are designed to handle higher axial loads besides radial loads. The larger the half-angle of this common cone, the more axial load it can sustain. Thus they work as thrust bearings as well as radial load bearings.

Needle Roller Bearings

Types of Bearings | Uses & Working Mechanisms Explained (11)

Needle roller bearing is a special type of roller bearings that has cylindrical rollers that resemble needles because of their small diameter.

Normally, the length of rollers in roller bearings is only slightly more than its diameter. When it comes to needle bearing, the length of rollers exceeds their diameter by at least four times.

As needle bearings have a smaller diameter, more rollers can be fit in the same space which increases the surface area in contact with the races. Thus, they are capable of handling high loads. The small size can also prove helpful in applications where space is limited as they require smaller clearances between the axle and the housing.

Needle bearings are used in automobile components such as transmission and rocker arm pivots. They are also used in compressors and pumps.

When to Use Roller Bearings?

Roller bearings are the most common alternative to ball bearings. So let’s determine what kind of working conditions are best suited for this type of bearing.

  1. Heavy loads. Roller bearings provide a considerably larger area of contact, distributing the load more evenly. Thus, they are less prone to failure and can withstand high forces.
  2. Lower speeds. This, again, comes down to the contact area. There is more friction which can result in higher temperature generation and quicker wear.

Plain Bearings

Types of Bearings | Uses & Working Mechanisms Explained (12)

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A plain bearing is the simplest type of bearing. It usually only consists of a bearing surface. There are no rolling elements.

The bearing is basically a sleeve mounted on the shaft and fit into the bore. Plain bearings are inexpensive, compact and lightweight. They have high load carrying capacity.

Plain bearings are used for rotational, sliding, reciprocating or oscillatory motion. The bearing remains fixed while the journal slides on the bearing’s inner surface. To facilitate smooth movement, material pairs with low coefficients of friction are selected. Different types of copper alloys, for example, are pretty common.

This bearing can accommodate some misalignment, multi-directional movements, and is suitable for static as well as dynamic loads. It is used extensively in applications in the agriculture, automotive, marine, and construction industry.

The gudgeon pin that connects the piston to the connecting rod in diesel engines is connected through a plain bearing.

Types of Bearings | Uses & Working Mechanisms Explained (13)

The spherical bearing is also a plain bearing, although it consists of 2 parts – the inner ring and the outer ring. Although it looks similar to ball and roller bearings from the outset, they have no rolling elements between the two rings.

Fluid Bearings

Types of Bearings | Uses & Working Mechanisms Explained (14)

Fluid bearing is a special type of bearing that relies on pressurized gas or liquid to carry the load and eliminate friction. These bearings are used to replace metallic bearings in applications where they would have a short life in addition to high noise and vibration levels.

They are also increasingly being used to cut costs. Fluid bearings are used in machines that work at high speeds and loads. While the initial costs are higher, the longer lifespan in tough conditions makes up for it in the longer run.

When the machine is running, there is zero contact between the two elements (except during the start and stop) and hence it is possible to achieve near zero wear with fluid bearings.

Fluid bearings are classified into two types: hydrostatic and hydrodynamic bearings.

Hydrostatic Bearings

In this type, an externally pressurised fluid is forced between two elements that are in relative motion. The pressurised fluid forms a wedge between the moving parts and keeps them apart. The fluid layer may be very thin but as long as there is no direct contact, there will not be any wear.

The fluid is circulated by means of a pump. The exit orifice diameter may be adjustable to ensure the fluid is always under pressure at all shaft speeds and loads. Thus, precise gap control is possible.

Hydrodynamic Bearings

This type of bearing utilises the motion of the journal to force the fluid between the shaft and the housing. The journal motion sucks the lubricating fluid between the moving parts creating a constant wedge.

This, however means that during start-stop as well as at low loads and speeds, the wedge formation may not be good enough to prevent wear. Only at designed speeds will the system work exactly as needed.

Magnetic Bearings

Types of Bearings | Uses & Working Mechanisms Explained (15)

Magnetic bearings use the concept of magnetic levitation to hold the shaft mid-air. As there is no physical contact, magnetic bearings are zero-wear bearings. There is also no limitation on the maximum amount of relative speed it can handle.

Magnetic bearings can also accommodate some irregularities in shaft design as the shaft’s position is automatically adjusted based on its centre of mass. Thus, it may be offset to one side but will still function just as satisfactorily.

They are broadly classified into two types: Active and passive magnetic bearings.

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Active Magnetic Bearings

Active magnetic bearings use electromagnets around the shaft to maintain its position. If a change in position is picked up by sensors, the system adjusts the amount of current being fed to the system and returns the rotor to its original position.

Passive Magnetic Bearing

Passive magnetic bearings use permanent magnets to maintain a magnetic field around the shaft. This means there is no power input needed. The system is, however, difficult to design due to limitations as this technology is still in its early stages.

In many cases, the two types of magnetic bearings may be used in tandem where the permanent magnets handle the static loading while the electromagnets are used to maintain the position to a high degree of accuracy.


What is bearing types of bearings and how they work? ›

Ball bearings have spherical rolling elements and are used for lower load applications, while roller bearings use cylindrical rolling elements for heavier load carrying requirements. Linear bearings are used for linear movements along shafts and may also have rotational capabilities.

What is all the types of bearings? ›

There are several types of bearings, the four main types are: ball bearings, cylindrical roller bearings, tapered roller bearings and needle bearings. While ball bearings are the most common mechanisms, each device has its advantages and disadvantages.

How many types of bearings are there in mechanical engineering? ›

There are two types of bearings: contact and non-contact. Contact-type bearings have mechanical contact with equipment, which includes sliding, rolling, or flexural bearings.

How does a bearing work? ›

Bearings reduce friction by providing smooth metal balls or rollers, and a smooth inner and outer metal surface for the balls to roll against. These balls or rollers "bear" the load, allowing the device to spin smoothly.

What is the main purpose of bearings? ›

Friction is bound to occur between the rotating shaft and the part that supports the rotation. Bearings are used between these two components. The bearings serve to reduce friction and allow for smoother rotation. This cuts down on the amount of energy consumption.

Which bearing is best? ›

Angular contact bearings are the best bearing choice for high-speed applications. One reason is that the balls are smaller and smaller balls weigh less and produce less centrifugal force when rotating.

What are the two types of bearing? ›

  • Deep-Groove Ball Bearings. The most commonly used bearings are Deep-Groove Ball Bearings. ...
  • Angular Contact Ball Bearings. ...
  • Self-Aligning Ball Bearings. ...
  • Thrust Ball Bearings. ...
  • Spherical Roller Bearings. ...
  • Cylindrical Roller Bearings. ...
  • Tapered Roller Bearings. ...
  • Needle Roller Bearings.

How many different bearings are there? ›

Bearings are of only two types, friction, and antifriction bearings, and further subdivided these two like solid bearing, ball bearing, roller bearing, etc.

How is bearing size measured? ›

Simply place the jaws of your vernier caliper around the width of the outer ring of the bearing and close it until it meets the ring. Again, it should feel snug but not tight. The value which is displayed on the caliper is the width of the bearing.

What is bearings and its applications? ›

A bearing is defined as “a machine element that constrains relative motion to only the desired motion, and reduces friction between moving parts.” Designs and subsequent applications of bearings vary, however, bearings for the most part function to minimize friction within a given application.

Which bearing is used for high speed? ›

Ball Bearings are used to take heavy as well as high-speed loads.

What is name of bearing? ›

There are many different types of bearings, each used for specific purposes and designed to carry specific types of loads, radial or thrust. Here, we'll look at the 6 most popular types: plain bearings, rolling element bearings, jewel bearings, fluid bearings, magnetic bearings, and flexure bearings.

What are the advantages of bearings? ›

The advantages of bearings

They provide low friction and accurate performance under fluctuating loads and speeds. Bearings have a high load carrying capacity and can operate under extreme conditions of performance and speed.

What are bearings made of? ›

Most ball bearings are made of a type of steel known as high carbon chromium steel, often called chrome steel. This is used for reasons of cost and durability. Bearings are also made from other materials such as stainless steel, ceramics and plastic.

What are 3 main components of a bearing? ›

Bearings typically consist of the following components: Two rings, inner and outer, with raceways. Rolling elements - rollers or balls. A cage which keeps the rolling elements spearted and helps guide motion.

What are the four functions of bearings? ›

  • Reducing friction.
  • Supporting the load.
  • Providing the guide for moving components such as shafts or wheels.

How does a bearing rotate? ›

DSN Animation: How do ball bearings work? | Design Squad - YouTube

What are the four parts of a bearing? ›

Construction. Ball bearings are composed of four main parts: two rings (or races) the rolling elements (the balls), and the ball separator (retainer). Radial ball bearings and angular contact bearings have an inner and outer ring.

What is a friction bearing? ›

Definition of friction bearing

: a solid bearing on a railroad freight car usually of brass construction with babbitt lining whose interior surface is in direct contact with the surface of the axle end which it supports.

How do you read a bearing? ›

The first digit indicates the width or height series (dimensions B, T or H). The second digit identifies the diameter series (dimension D). The last two digits of the basic designation identify the size code of the bearing bore. The size code multiplied by 5 gives the bore diameter (d) in mm.

What is the formula of bearing? ›

Bearing Rating Life Calculation

C = Dynamic Capacity (dN or Lbs) P = Equivalent Bearing Load (N or Lbs) N = Rotating speed in RPM. e = 3.0 for ball bearings, 10/3 for roller bearings.

What is the life of a bearing? ›

Bearing life is essentially the length of time a bearing can be expected to perform as required in predefined operating conditions. It is based primarily on the probable number of rotations a bearing can complete before it starts showing symptoms of fatigue, such as spalling or cracking due to stress.

Which bearing is axial load? ›

Axial bearings, or thrust bearings, are designed to withstand force in the same direction as the shaft. This is called an axial load, or thrust load. In some applications, ceramic bearings, a type of radial bearing, are used to withstand high rotational speeds.

What is bearing in direction? ›

A bearing provides a direction given as the primary compass direction (north or south), degree of angle, and an east or west designation. A bearing describes a line as heading north or south, and deflected some number of degrees toward the east or west.

What is a step bearing? ›

Definition of step bearing

: a bearing that supports the lower end of a vertical shaft.

What is a roller bearing? ›

A roller bearing is a type of rolling-element bearing that uses a cylinder (roller) instead of a ball. In general, the cylindrical bearings allow for greater radial loads. They are made to handle heavier loads than ball bearings.

Where are bearings found? ›

They are often found in gearsets like car transmissions between gears, and between the housing and the rotating shafts. The helical gears used in most transmissions have angled teeth -- this causes a thrust load that must be supported by a bearing.

Why are bearings used in mechanical systems? ›

Nowadays, bearings are one of the most commonly used machine parts because their rolling motion make almost all movements easier and they help reduce friction. Bearings have two key functions: They transfer motion, i.e. they support and guide components which turn relative to one another. They transmit forces.

What is a machine bearing? ›

bearing, in machine construction, a connector (usually a support) that permits the connected members to rotate or to move in a straight line relative to one another. Often one of the members is fixed, and the bearing acts as a support for the moving member.

What is meaning of bearing number? ›

A bearing number is composed of a basic number and a supplementary code, denoting bearing specifications including bearing type, boundary dimensions, running accuracy, and internal clearance.

How do you find the bearing number? ›

Measuring your bearing: Most bearings are measured in three ways, the inside diameter or (ID), the outside diameter or (OD) and the width or (W). It is important to note that our bearing measurements are all done in the following order: Inside diameter (ID) x Outside diameter (OD) x Width (W).

What is 2Z in bearing? ›

The 2Z suffix indicates that the bearing has a steel seal on both sides. The bearings are filled with a high-quality grease and are lubricated for life. Internal play. The C3 in the product name means that this bearing has a higher (internal) clearance than normal.

What are the advantages and disadvantages of bearings? ›

Advantages and Disadvantages of Rolling Contact Bearings Over Sliding Contact Bearings
  • Small cost of maintenance, as no lubrication is necessary as in service.
  • Low initial and operation friction excluding at extremely high speeds.
  • Accurateness of shaft alignment.
  • Capability to resist passing shock loads.

What is bearing PDF? ›

➢ A Bearing is a machine element that allows constrained relative motion. between two parts, typically rotation or linear movement, and reduces friction between moving parts. ➢ Bearings are used basically for performing three important tasks as. mentioned below: * Reducing friction.

Where is ball bearing used? ›

Ball bearings are the most common bearing type and can be found in many every day objects, such skateboards, blenders, bicycles, DVD players and photocopiers. This type of bearing is typically used in applications which have a high speed and a low load.

What is low speed bearing? ›

Low-speed bearings defined

The dynamic conditions dictating the bearing design are indicated by the linear speed at the bearing pitch line, or the pitch line speed. Pitch line speeds of less than 500 fpm are generally considered low speed, and 500 fpm to 3,000 fpm are mid-range.

What is anti friction bearing? ›

An antifriction bearing is a bearing that contains moving elements to provide a low friction support surface for rotating or sliding surfaces. Antifriction bearings are commonly made with hardened rolling elements (balls and rollers) and races.

What type of bearing has the least friction? ›

Ceramic bearings are a good option for low torque applications. The material has a low coefficient of friction so these bearings can be used without lubrication. As a result, ceramic ball bearings are well-known for providing low levels of resistance and low frictional torque.

Why bearings are used in pumps? ›

The pump bearings support the hydraulic loads imposed on the impeller, the mass of impeller and shaft, and the loads due to the shaft coupling or belt drive. Pump bearings keep the shaft axial end movement and lateral deflection within acceptable limits for the impeller and shaft seal.

What is a bearing ring? ›

Bear´ing ring` 1. In a balloon, the braced wooden ring attached to the suspension ropes at the bottom, functionally analogous to the keel of a ship. Webster's Revised Unabridged Dictionary, published 1913 by G.

Who invented bearing? ›

The first patent on ball bearings was awarded to Philip Vaughan, a British inventor and ironmaster in Carmarthen in 1794. His was the first modern ball-bearing design, with the ball running along a groove in the axle assembly.

What are the disadvantages of bearings? ›

Disadvantages of plain bearings
  • High load-speed combinations generate too much heat.
  • Tilting moments with offset drives difficult.
  • Higher drive torques required in some cases.
  • Bearing clearance mandatory.
  • Additional cooling / heat dissipation required depending on design and application.

Where is fluid bearing used? ›

Michell/Kingsbury fluid bearings are used in a wider variety of heavy-duty rotating equipment, including in hydroelectric plants to support turbines and generators weighing hundreds of tons. They are also used in very heavy machinery, such as marine propeller shafts.

How do magnetic bearings work? ›

A magnetic bearing is an oil-free bearing system that uses electromagnetic forces to maintain relative position of a rotating assembly (rotor) to a stationary component (stator). An advanced electronic control system adjusts these electromagnetic forces in response to forces generated from machine operation.

What do you mean by l10? ›

The usual life rating for industrial applications is called “L-10” life. Simply put the L-10 life is the number of hours in service that 90% of bearings will survive. Or, conversely, 10% of bearings will have failed in the L-10 number of service hours.

What is metal bearing? ›

1. bearing metal - an alloy (often of lead or tin base) used for bearings. white metal. alloy, metal - a mixture containing two or more metallic elements or metallic and nonmetallic elements usually fused together or dissolving into each other when molten; "brass is an alloy of zinc and copper"

What is bearing and its types in surveying? ›

In land surveying, a bearing is the clockwise or counterclockwise angle between north or south and a direction.

What is a bearing in engineering? ›

Designed to enable rotational or linear movement in a device, bearings are machine elements that are used to reduce friction between moving parts and to enhance the speed and efficiency of a system. At the same time, bearings are used to support other parts of a machine by handling various amounts of stress.

What is bearing in NCC? ›

The clockwise angle formed by a straight line joining two points and direction of NORTH, is called the bearing between the two points. A bearing is always measured clockwise. NCC.

How many different bearings are there? ›

Bearings are of only two types, friction, and antifriction bearings, and further subdivided these two like solid bearing, ball bearing, roller bearing, etc.

What are the advantages of bearings? ›

The advantages of bearings

They provide low friction and accurate performance under fluctuating loads and speeds. Bearings have a high load carrying capacity and can operate under extreme conditions of performance and speed.

How do you identify a bearing? ›

The first digit indicates the width or height series (dimensions B, T or H). The second digit identifies the diameter series (dimension D). The last two digits of the basic designation identify the size code of the bearing bore. The size code multiplied by 5 gives the bore diameter (d) in mm.

What is the difference between angle and bearing? ›

When specifying directions, as is done in the preparation of a property survey, angles may be specified as bearings or azimuths. A bearing is an angle less than 90° within a quadrant defined by the cardinal directions. An azimuth is an angle between 0° and 360° measured clockwise from North.

What is true bearing? ›

The direction to an object from a point; expressed as a horizontal angle measured clockwise from true north.

How do you measure bearing angles? ›

Bearings: How to Find the Bearing of A from B using the ... - YouTube

What is the name of bearing? ›

There are many types of bearings, each used for different purposes. These include ball bearings, roller bearings, ball thrust bearings, roller thrust bearings and tapered roller thrust bearings.

What are 3 main components of a bearing? ›

Bearings typically consist of the following components: Two rings, inner and outer, with raceways. Rolling elements - rollers or balls. A cage which keeps the rolling elements spearted and helps guide motion.

What are the four functions of bearings? ›

  • Reducing friction.
  • Supporting the load.
  • Providing the guide for moving components such as shafts or wheels.

What is a back bearing? ›

back bearing (plural back bearings) (navigation) A bearing taken pointing to the exact opposite direction to the direction heading.

What is whole circle bearing? ›

What is Whole Circle Bearing (W.C.B)? The horizontal angle made by a line with the magnetic north in the clockwise direction is the whole circle bearing of the line. This system is also known as the azimuthal system. In this system, only the north direction is used as reference meridian.

What is bearing in map? ›

A bearing is the direction you're facing, measured clockwise as an angle from true north on a compass. This can also be called a heading.


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