Ball Bearings are designed for optimal service life.

Improved Raceways and Pressed Steel Cages Dramatically Enhance Performance & Versatility

DANBURY, CT, January 23, 2006 - Employing a significantly improved honing procedure known as "Plateau Finishing," INA/FAG engineers have dramatically reduced both friction moment and raceway surface roughness on their new X-Life(TM) Angular Contact Ball Bearings. Together with a new optimized design of the pressed steel cages, INA/FAG has been able to increase bearing service life by up to 50%.

Used wherever high thrust loads, high speeds and elevated temperatures are part of operating conditions - as well as the need for high running accuracy, the new X-Life Single Row Angular Contact Ball Bearings utilize these latest advancements to increase the fatigue limiting load by more than 30%. Numerous applications will benefit from these enhanced bearings, including electrical machines, pumps, compressors, and air handling equipment, as well as textile and printing machinery, turbines and a multitude of gearboxes. Operational advantages include:

o Lower operating costs resulting from reduced friction, lower bearing temperatures and reduced lubricant stressing
o Quieter running
o Suitable for high speeds
o High rigidity
o Universal designs for mounting in pairs
o More efficient bearing arrangements for significantly longer life
o Sealed and lubricated for life

In early 2004, INA/FAG announced its commitment to a new line of anti-friction bearings called X-Life, which combine the experience, innovation and problem-solving capabilities of both companies. The X-Life program brought a new level of standards to rolling bearings and a significantly improved price/performance ratio, incorporating advancements in ball and raceway finishes, improved kinematics, special materials and other innovative processes. The results have meant lower noise, reduced maintenance, higher load capacity and longer service life.

The grinding and honing methods used in INA/FAG's new Plateau Finishing production technology have significantly improved the quality of the bearing surface finishes and produced a greater profile accuracy of the raceways. Friction moment has been reduced by up to 10%, and the fatigue-limiting load has been increased by 30%, resulting in a dramatic improvement in service life of up to 50%.

Advanced Cage Design
The INA/FAG engineering team carefully evaluated the cage geometry in the angular contact ball bearings, and completely redesigned the contact area between the balls and the cage pockets. This helps achieve optimum contact and avoids wear in the cage pockets resulting from the backward and forward drifting of the balls. The newly optimized contact geometry leads to reduced friction and lower energy consumption and also results in less grease stressing and a reduction in grease contamination. In fact, tests show that grease life can be extended by up to 200%.

The X-Life Angular Contact Ball Bearings are available with the new pressed steel cage, and can also be sealed on one or both sides. The unsealed versions are heat resistant up to 150°C. Compared to bearings with brass cages, they are appreciably lighter, while offering the same excellent dynamic running properties. And since these new X-Life bearings are insensitive to synthetic lubricants and aggressive media, they are ideally suited for raising the productivity uptime in the chemical and mineral oil industries. They are also available in universal design and tolerance class P5 (Abec 5).

Existing brass and polyamide caged versions are still available with the improved X-Life raceway surface finishes for applications where they may be better suited than the steel cage variant.

From: http://news.thomasnet.com/fullstory/Ball-Bearings-are-designed-for-optimal-service-life-474507

Deep Groove Ball Bearings reduce noise in electric motors.

By optimising the contact geometry between the rolling elements and the ring raceways, Schaeffler's new 'Generation C' deep groove ball bearings are ideal for electric motors, providing 35% less friction and 50% less noise.

For designers of electric motors and for plant operators who use these motors, efficiency, noise and vibration levels of the motor are key design and quality criteria. The efficiency of small electric motors with low capacity - the type often found in electrical consumer goods such as washing machines, power tools and ventilators - is mostly determined by the power loss of the internal bearings.

The Schaeffler Group has therefore developed the 'Generation C' range of deep groove ball bearings, which not only offer 35 per cent less friction than its predecessor, but also cut noise levels by 50 per cent. This means a more efficient motor, resulting in reduced energy consumption. The new design improvements mean that the bearings can achieve higher running speeds (rpm), whilst simultaneously increasing the life of the bearing.

The bearings are therefore ideal for applications in which low noise and smooth running are critical. Reduced friction levels and improved energy efficiency from the bearings means a reduction in running costs for plant operators and a more efficient machine with extended maintenance intervals.

In order to reduce friction by 35 per cent, Schaeffler optimised the osculation (raceway curvature) between the balls and rings on the new bearings. This means there is less chance of misalignment between the inner and outer ring. As well as offering less friction, the bearings also generate less heat, making them suitable for higher running speeds.

Schaeffler also modified the seal on the bearings. The new novel HRS seal has modified double lip geometry and is made from nitrile butadiene rubber. These have been adjusted to match the recess on the bearing inner ring. Axial contact between the inner ring and the seal means more effective protection against contamination or loss of grease and less frictional torque. This results in longer grease life, increasing the life and reliability of the bearing and provides improved bearing performance at higher speeds (rpm).

Venting grooves have also been added in order to improve the run-in behaviour of the bearings. In addition to the HRS seal, the bearing shield has been modified. The recesses on the bearing rings and the shield geometry are functionally adjusted to each other in such a way that the sealing efficiency is improved and grease life increased. The new design creates an axial and radial labyrinth with the shield.

The improved guidance of the rolling elements also contributes to higher performance of the bearing. The new riveted steel cage, which replaces the previous steel 'ribbon' cage, offers higher rigidity and so is suitable for higher running speeds. The riveted steel cage also reduces noise levels and means the bearing is less sensitive to shock loads. The manufacturing tolerance of the bearings has also been increased (to P5 Abec 5 standards), ball roundness to G5 tolerances and improved surface finish.

The dimensions of the new bearings correspond to the previous bearing types, enabling easy replacement. Generation C bearings can operate in temperatures from -30°C up to +120°C.

The bearings are available with outside diameters from 26mm up to 90mm. Riveted steel cages are standard, although polyamide cages are optional. P6 or P5 tolerances can be specified on ordering. Sealing options include one or two gap seals; one or two lip seals; or low friction, non-contact labyrinth seals.

From: http://news.thomasnet.com/fullstory/Deep-Groove-Ball-Bearings-reduce-noise-in-electric-motors-561078

How It's Made - Ball Bearings (NTN)

Stainless steel deep groove ball bearings and its tolerances

There are several common designs of ball bearing, each offering various trade-offs. They can be made from many different materials, including: stainless steel, chrome steel, and ceramic (silicon nitride (Si₃N₄)). A hybrid ball bearing is a bearing with ceramic balls and races of metal.

SKF stainless steel deep groove ball bearings are resistant to corrosion from moisture and several other media. These single row deep groove ball bearings have the same deep raceway grooves and close conformity between raceways and balls as standard deep groove ball bearings made of carbon chromium (rolling bearing) steel. They are without filling slots and can carry axial loads acting in both directions in addition to radial loads, even at high speeds. SKF stainless steel deep groove ball bearings have the same running properties as conventional steel deep groove ball bearings, but have a lower load carrying capacity. The bearings are available in open and sealed designs for shaft diameters from 1 to 50 mm. SKF stainless steel bearings are identified by the designation prefix W, e.g. W 626-2Z.

SKF stainless steel bearings in metric sizes are produced to Normal tolerances as standard. Some sizes are also available to tolerance class P6 or P5 specifications. The tolerances conform to ISO 492:2002, classes Normal, 6 and 5. The inch-size bearings are produced with Normal tolerances for inch-size bearings as specified in BS 292:Part 2-1982 (now withdrawn).

How to propel ball bearing with compressed air

As you all know,a ball bearing is a type of rolling-element bearing that uses balls to maintain the separation between the bearing races.

The purpose of a ball bearing is to reduce rotational friction and support radial and axial loads. It achieves this by using at least two races to contain the balls and transmit the loads through the balls. In most applications, one race is stationary and the other is attached to the rotating assembly (e.g., a hub or shaft). As one of the bearing races rotates it causes the balls to rotate as well. Because the balls are rolling they have a much lower coefficient of friction than if two flat surfaces were sliding against each other. Ball bearings tend to have lower load capacity for their size than other kinds of rolling-element bearings due to the smaller contact area between the balls and races. However, they can tolerate some misalignment of the inner and outer races. From wikipedia.

So,it is a rolling bearing.If you want to play with it or just test it whether it works properly,watch video below :) which may help you.

Deep groove ball bearings

Deep groove ball bearings
Deep groove ball bearings are used in a particularly wide variety of applications. Consequently, they are available in many executions and sizes. The standard SKF range comprises the following types: – single row deep groove ball bearings – SKF Energy Efficient deep groove ball bearings – single row deep groove ball bearings with filling slots – stainless steel single row deep groove ball bearings – double row deep groove ball bearings – single row hybrid deep groove ball bearings, see section "Engineering products - Hybrid bearings" – single row deep groove ball bearings for high temperatures, see section "Engineering products -Bearings and bearing units for high temperatures" – cam rollers, see section "Track runner bearings - Cam rollers" – polymer ball bearings, see section "Engineering products - Polymer ball bearings" Single row deep groove ball bearings Single row deep groove ball bearings are particularly versatile. They are simple in design, non-separable, suitable for high and even very high speeds and are robust in operation, requiring little maintenance. Deep raceway grooves and the close conformity between the raceway grooves and the balls enable deep groove ball bearings to accommodate axial loads in both directions, in addition to radial loads, even at high speeds. Single row deep groove ball bearings are the most widely used bearing type. Consequently, they are available from SKF in many executions and sizes: – open basic design bearings  – sealed bearings  – ICOS® oil sealed bearing units  – bearings with snap ring groove, with or without snap ring  Other deep groove ball bearings for special applications, shown in the "Engineering products" and "Mechatronics" sections, include: – hybrid bearings  – insulated bearings  – high temperature bearings  – bearings with Solid Oil – sensorized bearings – polymer ball bearings  The SKF product range also includes bearings with a tapered bore. This variant is not included in this catalogue. Information will be provided on request. Deep groove ball bearings with filling slots Single row deep groove ball bearings with filling slots have a filling slot in both the inner and outer ring  enabling more and larger balls to be incorporated than in standard deep groove ball bearings. Filling slot bearings have a higher radial load carrying capacity than bearings without filling slots, but their axial load carrying capacity is small. They are also unable to operate at such high speeds as bearings without filling slots. Depending on the main application for which they are used, deep groove ball bearings with filling slots have a cage  or no cage. The smaller sizes, which are mainly used for automotive gearboxes and are identified by a standard designation, incorporate a cage. The standard assortment of these bearings comprises – basic design open bearings – shielded bearings – bearings with a snap ring groove. The large-size bearings which are designed for heavily loaded, slowly rotating applications are without cage. Stainless steel deep groove ball bearings SKF stainless steel deep groove ball bearings are resistant to corrosion from moisture and several other media. These single row deep groove ball bearings have the same deep raceway grooves and close conformity between raceways and balls as standard deep groove ball bearings made of carbon chromium (rolling bearing) steel. They are without filling slots and can carry axial loads acting in both directions in addition to radial loads, even at high speeds. SKF stainless steel deep groove ball bearings have the same running properties as conventional steel deep groove ball bearings, but have a lower load carrying capacity. The bearings are available in open and sealed designs for shaft diameters from 1 to 50 mm. SKF stainless steel bearings are identified by the designation prefix W, e.g. W 626-2Z. Double row deep groove ball bearings SKF double row deep groove ball bearings correspond in design to single row deep groove ball bearings. They have deep uninterrupted raceways and high conformity between the balls and raceways. They are able to carry axial loads acting in both directions in addition to radial loads. Double row deep groove ball bearings are very suitable for bearing arrangements where the load carrying capacity of a single row bearing is inadequate. For the same outside and bore diameters, double row bearings are slightly wider than single row bearings but have considerably higher load carrying capacity than single row bearings in the 62 and 63 series. From http://www.skf.com/portal/skf/home/products?newlink=1_1_0

Guaranteed methods of quenching technology of deep groove ball bearings

Selecting an appropriate quenching medium is particularly important. It determines the bearing microstructure and properties after quenching. Quenching medium usually has solid, liquid and gas three forms.

Deep groove ball bearings in heat treatment furnace heated to fully austenitic, for obtaining the required organization and performance, it need for a quenching treatment. Workpiece after cooling to obtain martensite organizations, its cooling rate must be greater than the critical cooling rate, but too cool and too fast will make volume shrinkage and microstructure transformation violent, caused a great deal of stress. Thus conditions for martensitic "f" should enable the cooling rate as low as possible.

NTN bearings after correct repairing are the same performance with new bearings. The precision parameter such as its clearance can meet the requirements of new bearings. It is important to understand and identify damage degree to choose the correct rehabilitation program. For example, surface finishing treatment can clear some minor damage, but could not clear the real fatigue and the debris or wear caused by depression. Therefore, if only for the NTN bearing surface finishing treatment, generally it is not suitable for serious injury deep groove ball bearings. And if fully repair remanufacturing technology, the fatigue of bearing layer is completely clear, replace the rolling elements, also cage being undertaken a comprehensive consolidation so that bearings can meet the performance requirements of a new bearing.

Once the deep groove ball bearings injure, they must go through a very rigorous testing procedures to determine whether the injury NTN bearings can be repaired. Bearings must be fully cleaned, and then a very rigorous and comprehensive testing. The first is to detect whether the bearing damage, such as cracks, spalling and thermal discoloration, bearing with these injuries are likely beyond repair and must be scrapped.

Raceway surface of deep groove ball bearings, due to contacting with the roller elements, its running track is the dark side, track attached to the roller surface is within the exception, which may be able to tell the load conditions, so in removing the NTN bearing cases, pay strict attention and observe of raceway surface running track, you will learn the it bears only radial load, subjected to an axial load, tolerance for moment loads, or extreme inequality of rigid on the bearing box.

1, appropriate clearance of NTN bearing, too large will impact, too small will be poor lubrication, may be burnt.

2, improve lubrication quality and control oil pressure, temperature and flow, strengthening the oil filter.

3, geometry and surface quality of NTN bearings and axle should be strictly guaranteed.

4, adopted the fuel and lubricating oil in accordance with the demarcation.

5, take control of engine temperature, overheating or in cold case work is negative. In cold weather, diesel engine should warm up before starting, scroll with the hand crankshaft oil into the friction surface.

Single Row Deep Groove - Single Row Ball Bearings

Single Row Deep Groove - Single Row Ball Bearings | AST Bearings

Single row deep groove ball bearings are the most widely used roller bearing type in the world due to their versatility and overall performance. They are characterized by having deep raceway grooves in which the inner and outer rings have circular arcs of slightly larger radius than that of the balls. They also have non-separable rings. Their straight forward basic design has many advantanges:

• Excellent for high speeds

• Good radial load capacity

• Acceptable axial load capacity in both directions

• Have low torque capacity at startup and running speeds

• Can operate with low noise

• Require little maintenance

SKF inaugurates new factory in China

SKF inaugurated a new factory in Jinan on September 24, together with CNHTC, the largest truck manufacturer in China. The factory will provide tapered roller bearings and SKF Split Truck Hub Units for the truck market, as well as serve the industrial markets and vehicle aftermarket.

SKF China factory, Jinan