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Water Pump Presentation


The water pump is the heart of the automotive cooling system, typically a belt-driven centrifugal pump.

The pump circulates coolant throughout the system while the engine is running. If the drive belt fails, the water pump will not function. It is one of the reasons it’s so important to always check the status of the belt during maintenance. The water pump uses centrifugal force to send coolant to the outside while it spins, drawing coolant from the center continuously. The pump inlet is located close to the center so that coolant returning from the radiator strikes the pump vanes, which then fling the coolant to the outside of the pump to enter the engine. Coolant leaving the pump first flows through the engine block and cylinder head, then through the radiator and finally back to the pump.

Propeller Shaft and Drive Shaft
Propeller shaft, sometimes called a cardan shaft, transmits power from the gearbox to the rear axle.

Normally the shaft has a tubular section and is made in one- or two-piece construction. The two-piece arrangement is supported at the mid point by a rubber mounted bearing.

Electric motor bearings
The purpose of a bearing in an electric motor is to support and locate the rotor, to keep the air gap small and consistent and transfer the loads from the shaft to the motor. The bearings should be able to operate at low and high speeds whilst minimizing frictional loses. At the same time the bearing must be economic and require absolutely minimal maintenance (if any).

The following points are considered for selecting bearings during motor design


Weights and forces involved
Power transmitted
Magnetic pull as a result of unsymmetrical air gaps
Dynamic forces due to inaccurate adjustment
Out-of-balance situations
Pitch errors in gears
Potential thrust loads

Heavy loads are usually left to roller bearings and lighter loads are carried by ball bearings. Directions of all these loads will have direct relevance on your choice of bearing.

For example, cylindrical rollers can carry high radial loads but virtually no axial loads. Other bearings such as angular contact ball bearings can carry radial and axial loads.


The prescribed shaft speed will have a direct effect on the choice of lubricant, bearing size, cage design, internal clearance and shield/seal types. Induction motors and pulse modulation motors can produce electrical pitting or ribbing on bearing raceways, hence insulated bearing options are to be considered.

Coupling with gears or belts

The type of motor connection will produce load on the motors bearings. A coupling drive can produce forces in various directions; hence alignment is of key importance here.
In many cases a roller bearing with a degree of shaft float is used at the drive end and at the other a ball bearing, hence fixing the float direction and magnitude. A belt or gear take off can place higher loads than a coupling.

Vertical mounting arrangements

Motors, which are to be operated vertically, should have special consideration. Bearing arrangement is vital in vertical mounting, as are lubricant requirements.

Operating Environment

High humidity or damp conditions will require the bearing to have seals or shields. Solid contamination such as dust, mud, wood chips, metal flakes and other solid material will also require the bearing to have shields or seals. It should be born in mind that where solid contamination is high then secondary forms of sealing are desirable.


Ambient temperatures
Operating temperatures
Bearings generate their own heat but most heat will come from the rotor. Either air, oil or water can be used to cool the bearing however when there is the possibility of a high temperature gradient from the inner ring to the outer ring then special attention should be paid to the internal clearance. If no care is taken preloading could occur which will quickly lead to bearing failure.


In high vibration conditions cylindrical roller bearings provide the most resistance although special care should be taken over cage selection.

Low noise

Some applications require low noise bearings in which case deep groove bearings coupled with low noise grease provide the best solution. Bearing clearance can also have an effect here.

Bearing life

The life of a bearing is defined as the number of revolutions (or the number of operating hours at a given constant speed) the bearing can endure before the first sign of fatigue. The service life of a bearing depends to a large extent on the operating conditions while procedures used to mount and maintain it are equally important.


Grease lubrication should always be used where possible in motor applications. It simplifies maintenance and prolongs bearing life. Where speeds and temperatures are high then oil lubrication should be considered.


Motor maintenance normally consists of:
Servicing of the stator windings
Lubrication of the bearings
Monitoring of the motor performance
Permanently lubricated bearings that have shields or seals fitted do not require any relubrication, thus these are maintenance free.


The accuracy of the equipment will determine the accuracy of the precision grade of the bearings. For high precision bearings (normally associated with high speeds) the seating areas on the shaft need to be machined to corresponding levels of surface finish and roundness + concentricity.


Bearing type Load direction (magnitude) Speed
Tapered roller bearing Uniaxial (high), radial (high) Moderate
Ball bearing Axial (low), radial (moderate) High
Cylindrical roller bearing Radial (high) Moderate
Angular-contact ball bearing Axial (moderate), radial (moderate) High
Spherical-roller thrust bearing Uniaxial (moderate to heavy) High
Toroidal roller bearing Radial (high) Moderate

A pump is a device for lifting, transferring, or moving fluids by suction or pressure from one position to another.
The centrifugal pump is a type of pump that uses the kinetic energy of a rotating impeller to impart motion to the fluid The rotating impeller accelerates the fluid through its vanes and into the pump casing where the kinetic energy
of the moving fluid is converted to potential energy at higher pressure. As the fluid leaves the impeller through the pump discharge, more fluid is drawn into the pump inlet where the pressure is lowest. This fluid passes through the impeller as still more fluid enters the impeller.

There are three classifications of centrifugal pumps: radial flow, mixed flow and axial flow based on the direction the fluid enters the inlet (eye) of the impeller, see figure 1.2. Radial and mixed flow pumps are either single or double suction designs.


Belt driven outer ring mechanism is inherent in this design. Tensioner bearing is placed at slack side.(Idler bearing at tight side) There are various styles according to engine types.


  • To provide belt with tension·
  • To transfer driving force from crankshaft·
  • To prevent belt slippage·
  • To prevent noise caused by off-line belt·
  • To minimize space of belt layout


For the most part, Alternators are relatively small and lightweight. The alternators found in most passenger cars and light trucks are constructed using an aluminum outer housing, as the lightweight metal does not magnetize.

This is important since aluminum dissipates the tremendous heat generated by producing the electrical power and since the rotor assembly produces a magnetic field.

If you closely inspect an alternator, you’ll find it has vents on both the front and back side. Again, this aids in heat dissipation.
A drive pulley is attached to the rotor shaft on the front of the alternator. When the engine is running, the crankshaft turns the drive belt, which in turn spins the pulley on the rotor shaft.

In essence, the alternator transfers the mechanical energy from the engine into electrical power.

Overrunning Alternator Pulley Units feature a robust, proven design based on sprag one-way clutch technology.

This unique design helps extend auxiliary drive belt service life for even the most severe customer specifications. Overrunning Alternator Pulley Units also help reduce belt load and optimize the front-end system.


  • The ability to deliver greater power in a more compact form is what the auto industry is looking for in terms of current alternator design
  • For the bearings within such products, the impact is evidenced in increases in rotational speeds, temperature and loads from the poly V belt now commonly used to supply power to systems such as the AC compressor, the pump for power steering, the water pump and the alternator.
  • Normally the alternator requires two deep groove ball bearings mounted on the rotor shaft. The bearings mounted on the drive end (pulley side) locate the rotor. Usually, these would be sizes 6303, 6302 or 6203. The bearings mounted on the other side (slip ring side) are axially free, i.e. non-locating, sizes 6203, 6202, 6003 or 6002.
  • Modern alternators have internal ventilation and are equipped with two high-performance fans located inside the alternator body at each end of the rotor coil. Previous designs have a single external fan behind the pulley. In some cases, to provide better servicing and other functions, the slip ring and its two brushes are located at the end of the rotor instead of between the two bearings.
  • The alternator generates direct current for recharging the battery and for powering vehicle electrical loads.


We are extremely occupied in providing a complete assortment of Integral Shaft Bearing in order to fulfill the demands of our customers. These products are highly acknowledged and appreciated in the market for their easy installation and rust resistant nature. Advanced technology and latest machinery used in the manufacturing process that ensures defect free range of provided bearing.


  • Accurate dimensions
  • Stringent quality
  • Highly reliable


We are a renowned manufacturer, exporter and supplier of high quality of Generator Bearings. These precision engineered Generator Bearings are fabricated using the finest quality raw materials to ensure their durability and long working life. These special purpose bearings are precision engineered at our state-of-the-art manufacturing facility by diligent engineers. The Generator Bearings offered by us are available at affordable prices.


  • Precision-designed
  • High strength
  • High functional life


Our company is instrumental in offering a wide range of Water Pump Bearings. These are primarily applicable in many areas like electro-motive tools, automobile, engineering equipment, and textile and printing machinery. Manufactured at our warehouse in the most suitable conditions, this range can be availed from us at the most comprehensive prices.


  • Premium Quality
  • Easy to Attach
  • Robust in Construction


As a prominent company, we are engaged in offering a wide range of Electromagnetic Bearings with Air Condition to our client. And, these electromagnetic bearings are extensively used in various engineering industries. We offer this array in various sizes and can be customized too by our experts as per the requirements of our clients. Avail these bearings to our client in a very affordable rates.


  • Robust construction
  • Easy to install
  • Low maintenance