LLG Small Ball Bearing

Searching for a high-speed and low noise small ball bearing? LLG Small Ball Bearing is what you are looking for.

Our LLG Small Ball Bearing are made from chrome steel and available with a flange outer ring. We produce low noise, high friction, high precision, high sealing performance, long working life LLG Small Ball Bearings worldwide.

In addition, LLG Small Ball Bearing is strict in selecting materials. We choose industrial-grade quality, corrosion-resistant, and rust-proof materials for our LLG Small Ball Bearings. One of our materials is chrome steel and stainless steel.

We, the LLG Small Ball Bearings, always aim to produce quality bearings. Therefore, our bearings have precision rating of ABEC-1, ABEC-3, ABEC-5, ABEC-7, and ABEC-9. While vibration and clearance are Z1V1 Z2V2 and C0 C2 C3 C4 respectively. Also, LLG Small Ball Bearing is certified ISO9001:2008 standard.

Inquire and grab one of our LLG Small Ball Bearings now!

Small Bearings-The Ultimate FAQ Guide

In the modern era, due to the advancement in science and technology, the demand of high operational and efficient working machines have increased to a greater extent. 

The investors are in search of machinery which is friction-less and reliable for a longer period.

In this rising competition of advancement, the manufacturing of machines having high operational speed is a big challenge and LLG bearing company is working at its’ best to satisfy their customer. 

1. What Are Small Bearings? 

Small bearings are small round-shaped tiny rolling elements that help in the rotational movement of objects. Small bearings assist the shaft that rotates inside the machinery. 

Small bearings are important components in the modern machinery and various equipments. They are vital to the machine industries. It is the reason they are called as industries ‘bread and butter’.

Small bearings assist the rotating shafts of various machines like gears, wheels, turbines and rotors etc. 

Small Bearings

2. What Is the Suitable Size of Small Bearings? 

Small bearings are the bearings with a supposed external diameter of 28-55mm.

Small and medium-sized bearings are with the supposed external diameter of 60-115mm.

3. What Is the Purpose of Small Bearings?

The vital role which small bearings play is given as:

• Small bearings purpose is to lessen the friction which might occur between the rotating shaft of machines and make the rotating movement more and more smooth. 
• Small bearings protect the parts which aid in movement because a heavy pressure is applied between rotating shaft. Small bearings prevent them damage. 
• Small bearings help in positioning shaft in right place. 

4. What Are the Applications of Small Bearings? 

 Small bearing finds its best use in various equipments and machines. They are mentioned below:

• Automobiles
• Refrigerators
• Vacuum cleaners
• Pressure rotors
• Laptop cooling fans
• Electric generators
• Hard disk motors
• Office equipments
• Mining machines

5. Does Corrosion Occur on Small Bearings?

To answer this, operational failure of small bearings is due to dirt, debris and corrosion. Corrosion is the malfunction of industrial machinery. 

This failure is caused by improper use of small bearings which results in a lot of noise and torque. Rotting also occur on small bearings as a result of wrong installation excessive load on it. 

Signs of Corrosion

The signs of corrosion include dark-colored and grey-colored bands across the raceways. You may find dents on raceways. 

What Is Fretting Corrosion? 

Fretting corrosion is a type of corrosion that occurs when the fix between the small bearings rings and the shaft become loose enough and the rolling element motion results in detaching of small particle from the top side. This kind of fretting corrosion might have deleterious effects on load distribution in small bearings. 

Fretting corrosion

6. List the Features of Small Bearings? 

The small bearings are round-shaped rolling elements that have high speed and produce less noise. They do not result in frictional torque and excessive vibration. It also do not consume large amount of energy. 

Small bearings are produced in a sealed form. They are sealed in shields or other rubber seals to stop leaking of lubricating grease or entry of dust particles. Also crown type steel cage is used in small bearings. 

 7. What Are Small Bearings Made Up of? 

Small bearings are made up of various components. Small bearings material is processed to attain the desired output and to escalate its working performance. For example, plastic, steel, metal or other materials are used depending upon the speed and load, etc. 

Small Ball Bearings Constituents

Mostly, small ball bearings are made of steel, sometimes it is referred as chrome stainless steel. 

The chrome steel is also known as high-carbon chromium steel. The chrome steel composition has high carbon ratio and 1.5% chromium material which makes them vulnerable to corrosion. 

The common method of heat treatment from chrome steel is to harden the steel in a controlled atmosphere furnace. Small bearings made of chrome steel can work at continuous temperature up to 120°C. 

The elevated temperature (220°C) might have disastrous effects on their hardness as well as on their load carrying capacity. 

Small bearings constructed from stainless steel have grade of 440 and a good resistance to moisture, chemicals and water. 

Stainless steel of 316grade is corrosion resistant and is much softer than that of grade-440 stainless steel. It cannot be hardened when applied to extreme temperatures. 

Ceramic small bearings are best for extreme temperatures and corrosion. 

Small bearings made of plastic are not good enough to carry heavy loads as well as have low operational speed. 

8. What Are the Reasons behind Failure of Small Bearings? 

The major factors which leads to failure of small bearings are:

1. Improper Lubrication 

Small bearings failure results due to improper or wrong use of lubrications and excessive temperature heating that deteriorate the lubricant. 

When the lubrication failure occurs you can see bluish and brownish patterns on small bearing rings. 

2. Contamination

Contamination occurs when the various substances or antigens enter the small bearings cleaning solutions and lubricants. Foreign agents include dirt, dust, steel chips and san

In this condition, you can encounter dents on tiny rolling rings and raceways. Therefore, it is essential to maintain your working surroundings neat and clean. 

3. Misalignment

Misalignment in small bearing is the result of bent shaft, rooting out of nuts, and wrong installation due to loose-fix of rolling elements. 

In this case, you might see that raceways balls tracks are not in parallel to raceway edges. 

Misalignment

4. Improper Mounting 

In this failure, small bearings are not mounted on a rotating ring with a press fit. This causes ‘thrust failure’ because in this case balls have no support on both inner and outer rolling rings. 

Out of round housings, loose shaft fit, excessive tight fits, loose house fits and poor finish on bearing seats results in wear, cracked rings, fatigue and denting. 

5. Corrosion

Moisture, acids, low quality greasing, poor wrapping and condensation from high temperature reversals all results in corrosion. 

When the corrosion occurs, reddish and brownish spots are seen. 

6. Electrical Damage

Constant flow of A.C (Alternate Current) and D.C (Direct Current) with the low current result in electrical damage. In this failure, brown marks may be seen on the raceways. 

7. Fatigue

This failure is also referred as ‘Spalling’ which is due to excessive preload, overloading and tight inner-rings fits. 

Spalling causes high rate of vibrations and the running top-sides are ruptured. This also results in ejection of particles from hoop of small bearings. 

8. Overheating

Overheating is the cause of improper use of lubrication. 

Overheating results in de-coloring of small bearing rings and also deteriorates the lubricant. Oxidation occur due to overheating which leaves the surface of the tiny rolling elements dry as the oil is removed from the grease and the running is seized. 

9. Excessive Loads

When there is excessive load on bearings, it results in failure.

10. Improper Storage and Handling

Not storing small bearings in a proper way can come in contact with dirt and debris and high temperatures results in degradation of grease. 

Handling small bearings by scratching wrappings might expose them to dirt and corrosion. 

9. How to Prevent the Failure of Small Bearings?

Small bearings failure is caused by variety of reasons and solutions to prevent it are:

• Using right lubricant and proper refilling intervals.

• By following proper mounting measures
• Misalignment failure can be fixed by using high precision grade lock nuts. Also inspecting shaft and housing from bearing seats.
• False brinelling can be fixed by using lubricants consisting of anti-wear additives.
• Corrosion can be prevented by using proper small bearing materials like stainless steel.
• Properly insulate small bearings. 
• Use of proper paths and cooling devices.
• Storage and proper handling can be fixed by storing small bearings in clean and dry places and cover them.
• Filter the tools and touch them with clean hands.  

10. Is There Any Effect of Temperature on Small Bearings?

Temperature conditions are extremely important in the efficient working of small bearings. If a bearing made for operating in normal temperature is used in extremely high temperature then the working of small bearings is highly affected. 

High Temperature

• Decay of lubrication as it becomes less adhesive. 
• Hardness of metal is decreased to a greater extent
• Seals become dry and break causing contamination.
• Changes in fits and wearing of shaft. 

Low Temperature

• Viscous becomes too adhesive resulting in torque.
• Seal failure occurs and entry of contaminant particles is must. 
• Cage becomes delicate. 

11. What are the Solutions for efficient Working of Small Bearings When They Get Too Hot?

As the conditions for the heating of small bearing are different so the solution to the problem is different. 

• Regularly fill the bearing surface with suitable amount of grease. Use high quality lubricating grease to avoid temperature damage. 
• Use pressure oil cup and screw cap oil cup on the small bearings and rotate them frequently. 

12. How to Clean and Lubricate Small Bearings?

To ensure best working ability of your bearings, regularly clean and lubricate your small bearings. This act increases the durability and provide with the optimal speed of small bearings. Steps are:

1. Take small bearings out of the motor.
2. Then remove the shield of small bearings to reach the balls and cages. Some Metal-shielded bearings have a C clip round the outer part of raceways. 
3. Then pull out the old particles and grease out of the small bearing races. 
4. Put the bearings in a cleaning agent or a solvent and shake it well for few minutes and then place them in some clean solvent. 
5. Use an air compressor to blow out to remove the curd or fluid out. 
6. Now, dry the small bearings and add oil or grease in a minute quantity.
7. Put the small bearings back and give a little spin. If it rotates smoothly then the cleaning process is successful. 

13. What Are the Various Types of Small Bearings? 

Let’s take a deeper look into various types of small bearings:

• Ball Bearings

Ball bearings are the tiny rolling elements which maintain the spaces between inner and outer races.

The purpose is to rotate the shaft and reduces the friction between shaft and non-rotary machine parts. Ball bearings support radial and axial loads and are also referred as anti-frictional bearings. 

Ball bearings have lower load capacity. The contact between the raceways and the balls is very small. 

When one of the bearing races rotates, the balls rotate as well. 

Ball bearings have lower coefficient faction than that of two flat surfaces sliding against one another just because they are rolling. 

Ball Bearings

2. Roller Bearings

Roller bearings are known as anti-frictional bearings. Like ball bearings, roller bearings have two raceways but the balls are placed between them.

Small roller bearings can support heavy load than that of ball bearings. They can also assist in high axial loads. 

Roller bearings are sub-divided into the types given below:

• Cylindrical roller bearings
• Spherical roller bearings
• Taper roller bearings
• Needle roller bearings

Roller Bearings

3. Mounted Bearings

Mounted bearings are mechanical parts which consist if bearings housed within bolt on. Housed bearings provide shaft support for radial, thrust and various combinations of loads. 

Mounted bearings support the rotating shaft and also lessen the friction between the rotating and non-rotating elements. These are used in low speed equipments.

Mounted bearings are further divided into various parts:

• Pillow Block
• Flanged Cartridge
• Take-up Units

Mounted Bearings

4. Linear Bearings

Linear bearings are small bearings and provide linear movement along the shaft. It provides motion in only one direction. 

Linear bearings also include ball and roller bearings inside the housing. Roller bearings also have some secondary rotational characteristics depending upon the designs.

Linear bearings provide greater accuracy and lower friction. For example, used in linear tables. 

Linear bearings

5. Slide Bearings

Slide bearings are type of small bearings which offer one dimension motion. 

These are used in construction of bridges. Slide bearings are best use for low speed and heavy loads.

Support thermal movements and separate the components of structure against vibrations and shock and noise. 

Slide Bearings

6. Jewel Bearings

Jewel bearings are the tiny rolling elements used in slight rotating devices. For example, watches, meter movements and spinners. 

You can use these bearings in devices of small load and small shafts. They do not rely on other rolling elements. Examples are sapphire and ruby.

 Jewel Bearings

7. Friction-Less Bearings

Friction-less bearings are mechanical and electro-mechanical small bearings. They give support through magnetic fields and from air bearings. They are mostly used in equipments having high-precision level. 

8. Fluid Bearings

Fluid bearings are unique small bearings which rely on high potential gasoline and fluid to bear the burden given to it. It is used instead of noise producing small bearings. 

Fluids bearings can carry heavy loads and have mega speed. When the machines are in movement, there is chance of no wear. 

For example, used in hydroelectric plants to assist turbines and generators. 

Fluid Bearings

14. What Is the Difference between Small Ball Bearings and Small Roller Bearings?

Small Ball bearings consist of spherical hardened balls along the internal and external tracks. When a load is applied then the small ball bearings transmit the load from inner raceways to the outer raceways. This transmission of load causes rotational movement of balls. 

Small ball bearings have smaller contact area with the load. They are simple to use and are more common than small roller bearings. They can be used in household devices. 

Small Roller Bearings consists of cylinders with fixed axis of rotation. Shape of cylinders vary with each suitable for specific application. Small roller bearings have greater surface area. Small roller bearings make a line contact. They are shock resistant. 

15. What Are the Merits and Demerits of Small Roller Bearings?

Merits

• Small roller bearings have the ability to carry heavy loads.

• Have variants based on geometry. For example, needle roller bearings.
• Used in industrial equipments. 

Demerits

• They are more vulnerable to misalignment.
• Small roller bearings are unable to carry thrust load. 
• They can also encounter spalling and fatigue failure. 

16. Merits and Demerits of Small Ball Bearings?

The merits and demerits of small ball bearings are:

Merits

• Less friction and wear resistant
• Small ball bearings have less dimension area.
• They are easy to replace
• Less amount of lubrication is required for small ball bearings

Demerits

• Small ball bearings are very sensitive to shocks
• No decrease in vibration and noise 
• Small ball bearings cannot handle large weights
• Reduced pressure due to smaller contact area causes deterioration of small ball bearings 

17. What Are the Subtypes of Small Ball Bearings?

Small ball bearings come in various ranges of designs and applications, each of which is modified according to industrial use and type of load. 

You can benefit from variable shaped and sized small bearings ball bearings. 

• Deep Groove Ball Bearings

• Commonly used due to performance and versatile nature. 
• Have low-friction and high spinning speed. 
• Deep groove ball bearings can carry both radial as well as axial loads.
• Easy to maintain and install.

Deep Groove Ball Bearings

2. High Speed Angular Ball Bearings

• High precision ball bearings. 
• This kind is used to design high revolution per minutes(RPMS) with precision and accuracy. 

High Speed Angular Contact Ball Bearings

3.  Self-Alligned Ball Bearings

• This kind of small ball bearing has two balls which have the capacity to align themselves easily.  
• Used to carry radial and light axial loads. 

Self Aligned Ball Bearings

  4. Axial Bearings

• They are also referred as thrust ball bearings.
• Ceramic is used for tiny rolling elements that are much better and lighter than that of steel. 
• When running in high speed, this reduces the centrifugal force with ceramic bearings.

Axial Ball Bearings

5. Linear Motion

• Linear motion is the simple kind of motion.
• Linear bearings are designed to allow linear axis movement in only one direction.

6. Angular Contact Bearings

• In angular contact bearings, both the bearing raceways rings (inner and outer) work in a collective form to carry the load. These both rings can carry the axial and radial load.

Angular Contact Bearings

18. What Do You Know About Small Mounted Bearings? 

Just like small ball bearings features have become standard now-a-days, small mounted bearings are also in competition with them. 

• Wide Inner Rings

Wide inner rings give small mounted bearings an increased contact with the shaft. These are good at making it more stable. 

      2. Anti-Rotation Device

The addition of anti-rotation device results in loose fits but still allows the small bearings to self-allign. This feature life span of small mounted bearings up to 33%

     3. Flinger Seal

Flinger seal increases the level of protection. This feature is marked improvement over standard small bearing seal. In agriculture, the L3 (triple lip seal) protect the tiny rolling elements and have lower speed. 

   4. Bearing Steel

Bearing steel of 52100 is used in such small mounted bearings which have high durability and fatigue strength. 

   5. Bearing Retainers

Bearing retainers is essential feature in this kind of small bearings. It is referred as cage which controls the movement of tiny rolling elements, balances the spaces between rotating balls and also help in lubrication. 

19. What Are Small Fluid Bearings? Describe Its Types? 

Fluid bearings are small bearings in which load is carried by pressurized gas and the liquid between the bearing ring surfaces. They have possibility of zero-wear and the friction is low. 

Types of Small Fluid Bearings

• Hydrostatic Fluid Bearings

It gives a positive pressure and results in clearance between rotating and non-rotating tiny elements. Lubrication is introduced between the running surfaces with the help of pressure. 

Hydrostatic fluid bearings can bear heavy loads and it does not depend upon the lubrication and thickness of film. 

It has damping and stiffness coefficient of very large magnitude. The negative side is that it consumes more power and cost for maintaining is high. 

• Hydrodynamic Fluid Bearings

In hydrodynamic fluid bearings, gap occurs due to motion of bearing elements. They have the ability to carry radial and thrust load. 

Hydrodynamic fluid bearings depend upon the oily-film (air) which creates space when the spindle is in motion like, journal bearings.

19. What Are Small Magnetic Bearings?

Small Magnetic bearings are a type of small bearing that assists the load using magnetic field. In small magnetic bearings movement of parts occur without any physical contact.

Small Magnetic bearings have the sky-high speed and no limitation is required for it. 

Small magnetic bearings can raise the rotating shaft and relative motion which occurs produces less friction. Small magnetic bearings are wear resistant. 

Applications

Used in electric power generation, natural gas handling, machine tools, turbo-molecular pumps and in petroleum refining industries.

21. What Is the Difference between Active and Passive Magnetic Bearings?

Small active magnetic bearings use magnetic force instead of any physical contact.

Small Active Magnetic bearings generate bearing force by using electromagnets around the shaft. (AMB) Active Magnetic Bearing consists of:

• Position sensor which determines the position of shaft.
• Power supply
• Power Amplifiers
• Magnetic actuator
• Magnetic bearing controller

Small Active Magnetic bearings are furnished with safety bearings that protect from power failure.

Small Passive Magnetic bearings are a type of bearing which is based upon forces or field of permanent magnet. Disposition of the shaft from the pivot point depends upon the force applied. 

Small Passive Magnetic bearings are cheaper than that of Small Active Magnetic bearings and do not need any power supply. 

22. Why Is Preload Necessary in Some Small Bearing Applications? 

What is Preload?

Preload is the axial or thrust force applied to the bearings to align the ring raceways. 

Pre-loading the small bearings regulates the bearing efficiency and prevent from any damage. Without pre-loading small bearing rings will slide rather than rotating.

Preload is determined by the size of bearing, stiffness, starting torque and loading limits.

Excessive preload causes fatigue and increases heat.

Inadequate preload causes vibrant vibrations and also leads to fretting of raceways. 

Ways to Apply Preload

Preload to small bearings can be applied in two ways:

1. Spring preload
2. Solid preload

• Spring preload

It is represented as when separate load or a wavy washer is placed on the small bearings. The wave springs act on the external rings. A continuous axial force is applied against the external rings of small bearings. This method is not used when a high stiffness is required. 

• Solid Preload

This preload is done by places inner and outer rings of small beatings in exact position with racers and locking mechanisms when axial force is applied. The advantage of solid preload is its high stiffness. Disadvantage of solid preload is that they are temperature dependent and thermal expansion and contraction occur. 

23. What are the Features of Small Linear Bearings and Small Slide Bearings?

Small Linear and slide bearings are the mechanical parts that move only in one direction. It has higher accuracy and produces less friction. It also consist of rotary axis when the last axis is capable of rotary movement. Slide bearings are light-weight and have long operating lifespan. 

24. What Do You Know About Small Jewel Bearings?

This type of small bearing is also called as plain bearing. The spindle present in it moves in a centralized point. 

Features of small jewel bearings consist of high accuracy, low friction and temperature stability. Small Jewel bearings are designed in such as way that they can operate in corrosive environment. Oil lubrication lessens the friction. 

25. How Do We Encounter Small Friction-Less Bearings?

Small friction-less bearing uses air, gases and magnetic fields to support rotating elements. These include magnetic and air bearings. 

26. What Are the Characteristics of Various Small Bearings?

Small bearings have various types depending upon the size and shapes. 

Small Rolling Bearings

Small Rolling bearings are defined by line contact instead of point contact like small Ball bearings. Line contact provides higher loads but speed is low because of line contact. 

Different types and characteristics of Small Rolling Bearings are:

• Spherical Roller Bearings

These bearings use spherical rollers. These small bearings are powerful and can support heavy loads. These can adjust the misalignment that occurs between rotating elements.

Spherical Roller Bearings

• Cylindrical Rolling Bearings

These small roller bearings have a straight junction between raceways and the tiny rolling elements. It has extreme radial loading. Cylindrical Roller bearings produces less noise and heat generation is limited. 

Cylindrical Roller Bearings

• Tapered Roller Bearings

Such kind of small bearings consist of tapered raceways between the internal and external hoop.

They can hold high radial and axial drives that are only in one dimension.

Tapered Roller Bearings

• Needle Roller Bearings

Needle Rolling bearings constitute of long and thin rolling components. They are best for heavy loads and radial fields. 

Needle Roller Bearings

27. How Widely Are Small Bearings Used? What Would We Do Without Them? 

Small bearings play a vital role in our daily lives. From the devices used in household to the machines in industries all uses small bearings for their efficient working. LLG bearing company is striving hard to make them more error-free and long-lasting.

Let’s take an insight into car manufacturing. 

Small bearings are used in cars and provide smooth rotation. 

But if they are absent in cars then the rotation becomes rough and a large amount of energy is consumed. The parts of cars that support rotation would break out without them. 

The parts of cars which consist of small bearings are:

• Steering gears
• Pumps
• Wheels
• Alternators 
• Turbochargers

28. How to Choose Best Small Bearing Supplier for Your Company? 

Are you in search of best suppliers of small bearings? 

Here are the factors which you must consider when choosing the small bearings:

• Bearing Quality, Variety and Price
• Order fulfillment
• Provide with Custom bearings. 
• Face-to-face meet up

If these qualities are provided, then you are at the right place. 

LLG bearings offer these qualities to provide with the best operational small bearings to satisfy their customers and to increase the lifespan of machines to a great extent. 

29. What Are the Specification of Miniature and Small-Sized Ball Bearings? 

Miniature or small-sized ball bearings are the components of machines. It comprises an external diameter of 30mm. 

Small Ball bearings are essential for high precision rotary components. Small ball bearings are present in either shielded or opened form. Operational power is good when exposed to light weight loads. 

Miniature bearings are used in laser engravings, steeper motors, micro-motors, toys, video recorder drums, fax-machines, flow meters, radio models, anemometers, small gear boxes and in various things. 

Miniature bearings also experience failure when exposed to foreign agents and also results in corrosion.

When the installation of miniature bearings is good, the erosion can be avoided. But improper installation results in marked spots on the ring raceways. The dents or marks produced caused elevated level of noise, vibrations and torque error. 

Miniature or small-sized ball bearings are also in form of chrome steel miniature bearings. Chrome steel miniature bearings for shaft ranges from 1.5mm to 9mm. 

They are used for high speed applications containing low level of friction. The optimal temperature is upto120°C. 

Ribbon or crown type cages are made for miniature and small-sized bearings. Ribbon cage is used for larger bearings and crown cage for smaller bearings. 

Miniature and Small-Sized Ball Bearings

30. Who Are the Wholesalers of Small Bearings?

LLG Bearings possesses a great experience in producing a big range of small bearings. 

LLG Bearings is working to produce small bearings with the best quality and in affordable prices. LLG Bearings deliver small bearings all around the sphere. They also provide custom services as well. 

LLG Bearings satisfy their customers by producing excellent quality small ball bearings and various small roller bearings. The standard of the product fulfills the International demands.

If you want your machines to work efficiently and for a longer period of time, then LLG bearings is the best choice.