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What is water pump bearings?

Description 

Water pump bearings are simple and affordable; they can have either two rows of ball bearings or one row of ball bearings and one row of roller bearings, each well-spaced to ensure a longer life and their capacity to withstand higher radial loads. 

Advantages

The bearing is pre-lubricated with water-repellent grease which eliminates the need for maintenance, and is subjected to a special heat treatment during its production.

Special technical features

A shaft, which protrudes on both sides, is used instead of an inner ring, with the pulley mounted on one side and the pump impeller on the other.

Water pump bearings are used in various applications, for example:

* automotive engines;

* trucks;

* tractors;

* ship engines;

* etc.

Ceramic Hybrid Bearing

Ceramic Hybrid Bearings have Steel races and Ceramic Balls. Ceramic Balls are suitable for applications where high loads, high speeds and extreme temperatures are factors. Long life and the need for minimal lubrication make this material appropriate for extreme applications. Ceramic is non-porous, non-magnetic, non corrosive and lighter than steel. In ball form, ceramic balls are also harder than steel and because ceramic balls are non-porous they are virtually frictionless and capable of spinning faster than steel balls.

Ceramic Balls are usually made of following materials:

• Silicon Nitride (SiN4)
• Alumina Oxide (Al2O3)
• Zirconia Oxide (ZrO2)
• Silicon Carbide (SiC)

Because ceramic is a glass like surface it has an extremely low coefficient of friction and is ideal for applications seeking to reduce friction. Ceramic balls require less lubrication and have a greater hardness than steel balls which will contribute to increased bearing life. Thermal properties are better than steel balls resulting in less heat generation at high speeds.

Ceramic Hybrid Bearing Benefits

• High loads, high speeds and extreme temperatures are factors
• Increased bearing life and decreased down time
• Minimal need for lubrication
• No cold welding between ceramic balls and races
• Multi-purpose use in variety of machines and different production lines
• High efficiency, low weight and small size

Ceramic Hybrid Bearing Applications

Ceramic hybrid bearings are widely used in electric motors, aerospace applications, performance racing vehicles, laboratory equipment, under water applications and more. Any application that requires higher speeds, lower friction and longer life are ideal for ceramic hybrid bearings.

Ceramic Hybrid Bearing Styles and Sizes

Ceramic hybrid bearings are available in variety of sizes and styles.

Full Ceramic Bearings

Full Ceramic Bearings have races and balls that are made entirely of ceramic material and are superior to common steel bearings in many ways. Ceramic is the perfect material for any application seeking to achieve higher RPM’s, reduce overall weight or for extremely harsh environments where high temperatures and corrosive substances are present.

Full Ceramic Bearings are usually made of following materials:

• Silicon Nitride (SiN4)
• Alumina Oxide (Al2O3)
• Zirconia Oxide (ZrO2)
• Silicon Carbide (SiC)

Because ceramic is a glass like surface it has an extremely low coefficient of friction and is ideal for applications seeking to reduce friction. Ceramic balls require less lubrication and have a greater hardness than steel balls which will contribute to increased bearing life. Thermal properties are better than steel balls resulting in less heat generation at high speeds.

Full Ceramic Bearing Benefits

• Will not corrode or rust
• 2/3 the weight of steel
• Resistant to resist acids, alkali, blood, salt and water
• Extremely low coefficient of friction and thermal expansion
• Lower friction results in less energy consumed
• Operating Temperature from as low as (-85°C) up to (+ 900°C)

Full Ceramic Bearing Applications

Full Ceramic bearings are used in specialty applications like chemical baths, vacuum environments, semiconductor manufacturing, food processing industries and more. Any extreme environment that requires non-corrosive, non-conductive or non-magnetic bearings is ideal for full ceramic bearings.

Full Ceramic Bearing Styles and Sizes

Full Ceramic bearings are available in variety of sizes and styles。

Bearing Types and Tolerance Class

Bearing tolerances and permissible values for the boundary dimensions and running accuracy of bearings are specified. These values are prescribed in JIS B 1514 "tolerances for rolling bearings." (These JIS standards are based on ISO standards.)

Bearing tolerances are standardized by classifying bearings into the following six classes (accuracy in tolerances becomes higher in the order described): 0, 6X, 6, 5, 4 and 2.

Bearing type		Applied standards	Applied tolerance class
Deep groove ball bearing		JIS B 1514	Class 0	-	Class 6	Class 5	Class 4	Class 2
Angular contact ball bearing			Class 0	-	Class 6	Class 5	Class 4	Class 2
Self-aligning ball bearing			Class 0	-	-	-	-	-
Spherical roller bearing			Class 0	-	-	-	-	-
Cylindrical roller bearing			Class 0	-	Class 6	Class 5	Class 4	Class 2
Needle roller bearing (Machined ring type)			Class 0	-	Class 6	Class 5	Class 4	-
Tapered roller bearing	Metric series (Single row)	JIS B 1514	Class 0	Class 6X	Class 6	Class 5	Class 4	Class 2
	Metric series (Double or four-row)	BAS 1002	Class 0	-	-	-	-	-
	Inch series	ABMA	Class 4	-	Class 2	Class 3	Class 0	Class 00
	Metric series (J-series)		Class PK	-	Class PN	Class PC	Class PB	-
Thrust roller bearing		JIS B 1514	Class 0	-	Class 6	Class 5	Class 4	-
Spherical thrust roller bearing			Class 0	-	-	-	-	-

Do You Know How to Correctly Mount Rod Ends?

Do you know how to mount a Rod End?

Rod Ends consist of an eye-shaped head with integral shank forming a housing and a standard Spherical Plain Bearing, a spherical plain bearing inner ring, or a spherical plain bearing inner ring and a sliding layer between the bore of the head and the inner ring. As a rule, rod ends are available with left or right-hand female or male threads.

To facilitate mounting, the ends of pins or shafts and the edges of housing bores should have a lead chamfer of 10° to 20°.  The bearings can be more easily pressed into position and there is little risk of damage to the mating surfaces being caused by skewing of the bearing.

When mounting spherical plain bearings with a fractured or two-part outer ring, it is essential that the joint should be positioned at 90? to the main load direction; otherwise the service life will be shortened, particularly under heavy loads. Also, the bearing’s lubrication holes will be placed in the load zone, allowing lubricant distribution where it is needed most.

Bearing rings should NEVER be hammered into place. Only apply mounting forces onto the ring that is being mounted (i.e. force on outer ring if being pressed into a housing, force on inner ring if pressed onto a shaft). NEVER apply mounting forces though the bearing’s sliding surfaces, this will damage the bearing and will severely decrease its service life. In the event that the bearing has a press fit on both the inner and outer rings, a special tool should be made to allow pressing of both components simultaneously.

Other ways of mounting rod ends with the facilitation of heat or refrigeration, or with the use of adhesives may be possible also.

For more information or assistance of Rod Ends, you can contact with "Hubei Parts Service Supply Co., Ltd.".

Hubei Parts Service Supply Co., Ltd.

Mobile Phone.: 86-18062246726

Tel: +86-0710-4212115

Mail: partsservicesupply@gmail.com

        sales@partsservicesupply.com

SKYPE: stellaqiao

Whatsapp: +8618062246726

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How to Measuring and Choosing the right bearing types?

When you need to replace bearings on equipment, it's important to take care to ensure that you know the exact bearing you need. The following guide will help you to identify the type of bearing you need, and get an understanding of the different types available.

Checking the reference number

The quickest, simplest way to be able to determine which bearing you need is to look at the reference number. Most modern bearings have this reference number engraved by laser on the actual bearings themselves, but these are often rubbed off over time due to wear and tear. If you aren't able to read the reference number you require, then it may be necessary to measure it manually.

Measuring bearings

This is the process you will have to undertake if it isn't possible to read a bearing reference number. It's vital that you determine the correct type accurately, so there's little margin for error here.

The best way to accurately measure the dimensions of a bearing manually is to use a tool called a vernier caliper. If you don't have one of these, it is possible to simply use a ruler, just take extra care to ensure you are measuring precisely.

The dimensions you need to determine for a bearing are the width, the diameter of the inside and the diameter of the outside.

Once these dimensions have been accurately measured for the bearing, you need to find the appropriate bearing to purchase. The three main kinds of bearing are as follows: roller bearings; ball bearings; needle bearings.

Roller bearings

A roller bearing is a form of rolling-element bearing that utilises cylindrical rollers to keep the bearing's moving parts separated. Its purpose is to limit rotational friction while supporting radial and axial loads.

Ball bearings

A ball bearing is another rolling-element bearing, but it uses balls to separate the bearing races instead of cylindrical rollers. It also helps to minimise friction while supporting radial and axial loads.

Needle bearings

A needle bearing is another take on the rolling concept, this time using a series of long, thin cylinders as rollers which have a resemblance to needles. Once again, their function is to minimise friction on a rotating surface.

Using bearing suffixes

Once you have collected all the dimensions of your bearing by measuring, either with a vernier caliper or a ruler, you can use them to perform a search to find the correct bearing for your needs.

With the correct bearing identified based on measurements, there are further options to choose from. Firstly, all bearings have a seal that covers either side of the unit, which can be identified by a suffix. If the suffix reads ZZ or 2Z, the bearing has two metal shields. If it reads 2RS1, 2RSR or DDU then it has two rubber seals.

Furthermore, all bearings are given a clearance value. This feature gives the bearing space for expansion in the area between the bearing races. It thus adds a limited amount of play between the two rings.

This is useful, for example, if a bearing is liable to get hot when in use. The built-up heat will require room to escape, otherwise, there is a risk that the bearing might fail. The following markings indicate how much clearance a bearing has:

• C4: This means the bearing has the greatest clearance.
• C3: This means the clearance is above the international standard.
• No Marking: This indicates the clearance is standard.
• C2: The clearance here is below the international standard.

When measuring and choosing your bearing, it is vital that you are precise. If the reference number is illegible, then it's down to your measuring to ensure the correct bearing size is identified. If you follow the instructions in this article, you will identify your bearing accurately and be able to choose the right replacement when shopping online.

Hubei Parts Service Supply Co., Ltd.

Mobile Phone.: 86-18062246726

Tel: +86-0710-4212115

Mail: partsservicesupply@gmail.com

        sales@partsservicesupply.com

SKYPE: stellaqiao

Whatsapp: +8618062246726

Website: www.partsservicesupply.com

Facebook: www.facebook.com/partsservicesupply

Spindle Bearing

 

     

Spindle bearings are single row angular contact ball bearings comprising solid inner and outer rings and ball and cage assemblies with solid window cages. They cannot be dismantled. The bearings are available in open and sealed versions.

Spindle bearings have restricted tolerances. They are particularly suitable for bearing arrangements with very high requirements for guidance accuracy and speed capacity. They have proved highly suitable for the bearing arrangements of spindles in machine tools.

Hubei Parts Service Supply Co., Ltd.

Mobile Phone.: 86-18062246726

Tel: +86-0710-4212115

Mail: partsservicesupply@gmail.com

        sales@partsservicesupply.com

SKYPE: stellaqiao

Whatsapp: +8618062246726

Website: www.partsservicesupply.com

Facebook: www.facebook.com/partsservicesupply

How Different Bearing Materials can affect bearings performance?

Although bearings are mechanically quite simple, choosing the right bearing material to match the loading and environmental conditions can drastically affect bearings performance.

Whether it’s in a food manufacturing plant, on an automotive assembly line or even in consumer products like skateboards and power tools, bearings play a vital role in reducing friction between the moving parts in a mechanical system.

Bearings come in all shapes and sizes, however, the most common types include plain bearings, which consist of just a shaft rotating in a hole aided by a sleeved section, and rolling-element bearings, made up of balls or cylindrical rollers between the rotating inner and outer rings. As well as this, bearings contain other elements such as raceways to guide the balls and cages to ensure correct alignment and spacing.

The bearing housing and structure is most commonly made from steel, the raceways and cages (or retainers) are typically made from steel or plastic and the balls can be made from steel, ceramic or plastic.

To allow design engineers to easily select the right material for the job, Matmatch is aiming to become the largest material property database freely accessible on the internet today. Within this database, there are several material types that can be selected for bearings.

Steel bearing material

Steel is widely available and performs well under high loading due to its high radial and static load capacity, allowing it to achieve a high speed of rotation without posing a risk of permanently deforming the balls.

This is because most bearings in industrial applications are made using chrome steel (SAE 52100). This has higher levels of carbon content and about 1.5 per cent chromium content. The manufacturing process involves a controlled heat treatment stage that takes the surface hardness to around 60–64 on the Rockwell hardness scale (HRc). This not only gives chrome steel a smoother, harder finish, it also means that it can withstand higher temperatures of up to 120 degrees Celsius.

However, steel is heavy, noisy and the low chromium content of chrome steel means that it has a low resistance to chemicals and corrosion. This means that, despite the high hardness, any exposure to water and acidic compounds in the lubricant, or even dust and debris, can lead to increased wear, and fatigue on the steel balls and  raceway; the prolonged impact of which, if left unchecked, will lead to the ultimate catastrophic failure of the bearing.

This is particularly important for food manufacturing environments, for example, where the ambient levels of heat and humidity regularly change. One machine may be frying and baking food items, while another machine further down the line may be chilling and flash freezing the product.

To this  end, bearing users may consider opting for a stainless steel that typically contains a higher chromium content of around 18 per cent, which gives it a higher level of corrosion resistance.

AISI 440C stainless steel is made using a standard manufacturing process that involves rapid heating and quenching, which makes the steel  Martensitic, meaning that it gives the steel a hard crystalline structure.

So, although 440C stainless steel has a slightly lower hardness — and a lower load carrying capacity — than chrome steel, it can sustain temperatures typically up to 250 degrees Celsius. This is useful for bearing applications where a high speed needs to be maintained continuously.
One of the disadvantages of both of these types of steel is that their carbon content gives them magnetic properties that make them unsuitable for use in medical equipment such as MRI imaging machines. Here, engineers should consider austenitic stainless steels such as AISI 316 (carbon – 0.08% Max).

The low carbon content makes this type of steel non-magnetic. However, it is important to note that this also prevents the steel from being effectively hardened so has a low load carrying capacity and is therefore limited to lower rotational speeds.

Ceramic bearing material

For pharmaceutical, food and chemical processing applications, bearings can be exposed to high levels of chemical, detergent and acidic conditions and placed under heavy loads. Here, engineers may be better served by bearings that use ceramic balls. Although the retainers and rings may still be made of steel, the balls will be made from ceramic.

Ball bearings made from ceramic materials such as silicon nitride (Si3N4) offer smoother surfaces, lower thermal expansion, high hardness (over 70 HRc), low corrosion and low electrical conductivity.

Ceramic ball bearings can be around 60 per cent lighter, 120 per cent harder andaround 70 per cent stiffer than their steel counterparts, while still achieving a much higher temperature rating of over 700 degrees Celsius.

Ceramic balls also require less lubrication — often being capable of lubrication-free operation — offer lower friction levels and remain cool at high speeds. Crucially, ceramic bearings can be used in non-magnetic applications.

The downside is that ceramic bearings can suffer from lower load capacities and are more sensitive to thermal shock, which can lead to cracking. In these situations, choosing alternative types of ceramic such as zirconia (ZrO2) and silicon carbide (SiC) may offer the best result.
 

Plastic bearing material

Plastic is ideal for non-magnetic, non-conductive and highly corrosive areas. Here, the bearings offer a very lightweight yet high strength alternative. Plastics used in bearings can range widely, including materials such as polyoxymethylene (POM-C), general polyamide (PA6/66), polyetheretherketone (PEEK), polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE, Teflon), and phenolic impregnated fibres.

Plastics are good at normal and high speeds; they are self-lubricating, corrosion resistant and operate quietly and smoothly, capable of reaching temperatures up to 150 degrees Celsius. This is achieved because of plastic's low coefficient of friction (COF), which remains consistent over time as plastic exhibits little wear.

However, caution should be exercised at very high temperatures and in applications where the bearing is subject to high loads because this can cause permanent deformation of the balls and cage.

As industrial and consumer applications become more complex, it is important that engineers not only select the right type of bearing, but the right bearing material for the application. Using a materials database is the first step on the journey to better performance, cost savings and improved product life.