The Basics of Ball Bearings

The concept behind a bearing is very simple: Things roll better than they slide. The wheels on your car are like big bearings. If you had something like skis instead of wheels, your car would be a lot more difficult to push down the road.That is because when things slide, the friction between them causes a force that tends to slow them down. But if the two surfaces can roll over each other, the friction is greatly reduced.

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.

Bearing Loads

Bearings typically have to deal with two kinds of loading, radial and thrust. Depending on where the bearing is being used, it may see all radial loading, all thrust loading or a combination of both. The bearings in the electric motor and the pulley pictured above face only a radial load. In this case, most of the load comes from the tension in the belt connecting the two pulleys.

The bearing  is like the one in a barstool. It is loaded purely in thrust, and the entire load comes from the weight of the person sitting on the stool. The bearing  is like the one in the hub of your car wheel. This bearing has to support both a radial load and a thrust load. The radial load comes from the weight of the car, the thrust load comes from the cornering forces when you go around a turn.

Bearing failure
A prematurely failed rear bearing cone from a mountain bicycle, caused by a combination of pitting due to wet conditions, improper lubrication, and fatigue from frequent shock loading.

Rolling-element bearings often work well in non-ideal conditions, but sometimes minor problems cause bearings to fail quickly and mysteriously. For example, with a stationary (non-rotating) load, small vibrations can gradually press out the lubricant between the races and rollers or balls (false brinelling). Without lubricant the bearing fails, even though it is not rotating and thus is apparently not being used. For these sorts of reasons, much of bearing design is about failure analysis.

There are three usual limits to the lifetime or load capacity of a bearing: abrasion, fatigue and pressure-induced welding. Abrasion is when the surface is eroded by hard contaminants scraping at the bearing materials. Fatigue is when a material breaks after it is repeatedly loaded and released. Where the ball or roller touches the race there is always some deformation, and hence a risk of fatigue. Smaller balls or rollers deform more sharply, and so tend to fatigue faster. Pressure-induced welding is when two metal pieces are pressed together at very high pressure and they become one. Although balls, rollers and races may look smooth, they are microscopically rough. Thus, there are high-pressure spots which push away the bearing lubricant. Sometimes, the resulting metal-to-metal contact welds a microscopic part of the ball or roller to the race. As the bearing continues to rotate, the weld is then torn apart, but it may leave race welded to bearing or bearing welded to race.

Although there are many other apparent causes of bearing failure, most can be reduced to these three. For example, a bearing which is run dry of lubricant fails not because it is "without lubricant", but because lack of lubrication leads to fatigue and welding, and the resulting wear debris can cause abrasion. Similar events occur in false brinelling damage. In high speed applications, the oil flow also reduces the bearing metal temperature by convection. The oil becomes the heat sink for the friction losses generated by the bearing.

ISO has categorised bearing failures into a document Numbered ISO 15243.

ARB Bearings Limited
H-22, Udyog Nagar
New Delhi - 110041, Delhi, India
Phone: +(91)-(11)-25471274 / 25471255 / 25186300
Fax: +(91)-(11)-25475455 / 25470126
Email: info@arb-bearings.com, export@arb-bearings.com, sales@arb-bearings.com
For Export Enquiry : 
Mr. Divay Rathee : +91-9968373086
Website: http://arb-bearings.com/contact-us.php

The Role of Bearings in Bicycle

The bicycle is a self-explanatory machine. Almost every part of it is there to be seen at a glance. So it's all too easy to neglect or underestimate the hidden ball bearings which keep the moving parts on the move.In any mechanical device, where two bearing surfaces make frictional contact with each other, some means must be found of minimising the friction.

In many cases, a well-lubricated "plain" bearing will do the job, especially if the bush is of phosphor-bronze or some similar hard alloy. In the more advanced "ball" bearing, however, the load or thrust is borne by a number of hardened alloy-steel balls which are themselves free to move along a narrow circular channel or "race." In a theoretically ideal ball-bearing, the load is concentrated at areas which are merely points. The steel balls are theoretically perfect spheres and therefore make direct contact with the opposing surfaces at two points, reducing the area liable to frictional wear to an absolute minimum. Also, as the balls themselves are of a specially-hardened steel and are free to move in a rolling manner, any slight amount of wear which they undergo during the course of time will be equalised over the entire surfaces of the balls. The balls, therefore, may ultimately become slightly reduced in size, but they will all be reduced equally; and thus they will keep their spherical shape, so that the working efficiency of the ball bearing is maintained.

In practice, ball-bearings are not perfect in their proportions, and signs of wear occur after a time. A theoretically perfect ball bearing would need no lubrication at all. Since it is impossible to manufacture absolutely spherical hardened steel balls, a true rolling motion of the balls within their race cannot be guaranteed; and the ball-race itself is always slightly concave - this concavity increasing with wear. So commercial ball-bearings must be lubricated.

*All ball-bearings in a bicycle should be dismantled and examined at the minimum once a year. Twice a year is much better. If the balls have not been adequately lubricated they will be worn sharp or rough, with small pits or depressions in the surfaces of the races. The best thing to do with such an article is to chuck it out.

Generally speaking, the balls themselves are the first to show signs of wear, and replacing them, with new balls will be enough to make the bearing like new. But the slightest sign of pitting in a hub-cone, or a crown-race, or a bracket-cup, should mean its instant relegation to the dust bin. Fitting new balls to worn races will simply ensure the rapid destruction of yet another set of balls.It sometimes happens that a ball will crack, breaking up into small fragments. Generally, this fault is detected soon after it has occurred; particularly if the cracking has taken place in the head-assembly or the bracket-interiors.

Do not merely replace the defective ball with a new one. Replace ALL the balls in that race. This makes sure that all the balls in the race are of uniform size. If a new ball has a slightly larger diameter than the old worn balls it will have to bear a far greater share of the load. It will come under excessive strain, probably resulting in a repeat performance of the original trouble!Dirt and dust are great enemies of ball bearings and if not kept out of the bearing, will set up friction between the individual balls in the race, preventing them from rolling freely. "Sticking" and "sliding" will result; this erratic behaviour will soon wear depressions into the race and will gradually destroy the entire bearing. This is why the efficiency of the hub dust-caps or other covering, should be carefully maintained.

The best lubricant for a ball-bearing consists of a medium-thin grease, filling the hubs, bracket, and head, with the excess wiped away after assembly. Pedals and (some) gear-pulleys are also fitted with ball-bearings, so don't forget these usually neglected items.The steel balls will thus become covered with a thin layer of lubricant which will not only reduce frictional wear at their points of contact within the race, but will also minimise the inevitable friction between the balls themselves.If you have any doubt as to the number of balls to put into a race, simply fill it and then remove one ball. The number of balls should NEVER be over-estimated; it would be better to under-estimate. An over-filled race will always jam -sooner or later. Similarly, it is the lesser of two faults if a bearing is slightly loose, rather than even fractionally tight.

 One big thing has changed though; twenty odd years ago most cycle components had no significant bearing seals. They relied heavily on the water resistance of the grease itself to keep the water out. It was only the invention of the mountain bike and people riding through muddy puddles up to their axles which forced component manufacturers to significantly improve the quality of their seals. As a result, modern quality cycle parts don't need re-greasing every six months. Many in fact are sealed for life and we are seeing more and more sealed cartridge bearings being specced as standard equipment.

ARB Bearings Limited
H-22, Udyog Nagar
New Delhi - 110041, Delhi, India
Phone: +(91)-(11)-25471274 / 25471255 / 25186300
Fax: +(91)-(11)-25475455 / 25470126
Email: info@arb-bearings.com, export@arb-bearings.com, sales@arb-bearings.com
For Export Enquiry : 
Mr. Divay Rathee : +91-9968373086
Website: http://arb-bearings.com/contact-us.php

Some Interesting Uses of Bearings

There are several types of bearings, and each has its own interesting uses, including magnetic bearings and giant roller bearings.

Magnetic Bearings  Some very high-speed devices, like advanced flywheel energy storage systems, use magnet bearings. These bearings allow the flywheel to float on a magnetic field created by the bearing.Some of the flywheels run at speeds in excess of 50,000 revolutions per minute (rpm). Normal bearings with rollers or balls would melt down or explode at these speeds. The magnetic bearing has no moving parts, so it can handle these incredible speeds.

Giant Roller Bearings Probably the first use of a bearing was back when the Egyptians were building the pyramids. They put round logs under the heavy stones so that they could roll them to the  building site.This method is still used today when large, very heavy objects like the Cape Hatteras lighthouse need to be moved.

Earthquake-Proof Buildings The new San Francisco International Airport uses many advanced building technologies to help it withstand earthquakes. One of these technologies involves giant ball bearings. to see the earthquake bearing support system at work.The 267 columns that support the weight of the airport each ride on a 5-foot-diameter (1.5-meter) steel ball bearing. The ball rests in a concave base that is connected to the ground. In the event of an earthquake, the ground can move 20 inches (51 cm) in any direction. The columns that rest on the balls move somewhat less than this as they roll around in their bases, which helps isolate the building from the motion of the ground. When the earthquake is over, gravity pulls the columns back to the center of their bases.

Protecting bearings is critical to a motor's reliability and useful life.

That's why Baldor Electric Company, Fort Smith, Ark., is now using Exxon Polyrex EM polyurea grease to extend bearing life in its industrial electric motors from 1/50 to 1,500 hp.In tests to 350°F, the new grease reportedly extends lubrication life for bearings by more than four times when compared to other polyurea greases. It is also more durable when subjected to mechanical shearing forces, says the company. A specially formulated additive system resists washout, rust, and corrosion, even when exposed to saltwater.

ARB Bearings Limited
H-22, Udyog Nagar
New Delhi - 110041, Delhi, India
Phone: +(91)-(11)-25471274 / 25471255 / 25186300
Fax: +(91)-(11)-25475455 / 25470126
Email: info@arb-bearings.com, export@arb-bearings.com, sales@arb-bearings.com
For Export Enquiry : 
Mr. Divay Rathee : +91-9968373086
Website: http://arb-bearings.com/contact-us.php

Ball Bearing vs. Journal Bearing

The journal bearing has long been the brawn of the turbocharger, however a ball bearing cartridge is now an affordable technology advancement that provides significant performance improvements to the turbocharger. Ball bearing innovation began as a result to work with the Garrett Motor Sports group of several racing series where it received the term the 'cartridge ball bearing'. The cartridge is a single sleeve system that contains a set of angular contact ball bearings on either end, whereas the traditional bearing system contained a set of journal bearings and a thrust bearing.

Turbo Response - When driving a vehicle with the cartridge ball bearing turbocharger, you will find exceptionally crisp and strong throttle response. Garrett Ball Bearing turbochargers spool up 15% faster than traditional journal bearings. This produces an improved response that can be converted to quicker 0-60 mph speed. In fact, some professional drivers using Garrett ball bearing turbocharged systems claim that they feel like they are driving a big, normally aspirated engine.

Reduced Oil Flow - The ball bearing design reduces the required amount of oil to provide adequate lubrication. This lower oil volume reduces the chance for seal leakage. Also, the ball bearing is more tolerant of marginal lube conditions, and diminishes the possibility of turbocharger failure on engine shut down.

Improved Rotor Dynamics and Durability - The ball bearing cartridge gives better damping and control over shaft motion, allowing enhanced reliability of both everyday and extreme conditions. In addition, the opposed angular contact bearing cartridge eliminates the need for the thrust bearing, commonly a weak link in the turbo bearing system.

Additional Ball Bearing Options - Another option one will find is a hybrid ball bearing. This consists of replacing only the compressor side journal bearing with a single angular contact ball bearing. Since the single ball bearing can only take the thrust in one direction, a thrust bearing is still necessary and drag in the turbine side journal bearing is unchanged. With the Garrett ball bearing cartridge the rotor-group is entirely supported by the ball bearings, maximizing efficiency, performance, and durability.

ARB Bearings Limited
H-22, Udyog Nagar
New Delhi - 110041, Delhi, India
Phone: +(91)-(11)-25471274 / 25471255 / 25186300
Fax: +(91)-(11)-25475455 / 25470126
Email: info@arb-bearings.com, export@arb-bearings.com, sales@arb-bearings.com
For Export Enquiry : 
Mr. Divay Rathee : +91-9968373086
Website: http://arb-bearings.com/contact-us.php

Bearing Stock Clearance: Save Money On Your Bearings

We all heard the phrase, Everything Must Go, well when you buy from parts manufacturers, everything must go, works well in your favor. Stock clearances are done by a business when they are desperate to make some money to keep the doors open. Its like when a store has a going out of business sale, but then stays open after the sale is over. They just did it to bring in some extra business, or perhaps they were really facing the possibility of having to close their doors. But either way, they got the extra business to make their sales numbers for the month, quarter, or whatever period of time.

Buying your transmission bearings from a stock clearance sale is a really great way to save on your parts for your business. By buying from stock clearance sales, you get the products you need at a great price. Often times, these parts are sold for very above or even sometimes below cost. If youre lucky enough to find the bearings at a price below the cost that the supplier paid for them, then youve got a deal.

There are a variety of suppliers on the internet that have routine stock clearance sales. Simple internet search in your area will give you the information you need to contact the seller and get information on the bearings. From there, its just a matter of bargaining for a price you want, and making your shipping arrangements.

Finding a local supplier whos having a stock clearance sale can be as simple as looking at the ads in your local newspaper. But the telephone is probably going to be your best weapon. Call around to shops and find out if they are liquidating their stock, or having a sale. Try smaller, mom-and-pop suppliers first, because they dont have as many pricing standards as their corporate counterparts. Try and speak with the owner and see if you can get a deal for paying up front, or buying in bulk. If they are in your area, and you have the means to, pick up your order. This way, youll be able to save additional money on shipping costs.

Stock clearance sales arent always hard to find, but the items you need may be. Because of the tremendous amount of savings, these sales are usually highly attended, so their selections will often times be picked over quite a bit. So you have to make sure to shop early in order not to miss out on the bearings you want. After all, it doesnt matter how great a deal you could get on them, if theyre out of stock, most of these sales wont let you place them on backorder.

Saving money on the inventory you need for your business is a fundamental way to increase your profits. While it may take a little work on your part, you can really save quite a bit of money on bearings, or whatever other parts you may need for your business.

ARB Bearings Limited
H-22, Udyog Nagar
New Delhi - 110041, Delhi, India
Phone: +(91)-(11)-25471274 / 25471255 / 25186300
Fax: +(91)-(11)-25475455 / 25470126
Email: info@arb-bearings.com, export@arb-bearings.com, sales@arb-bearings.com
For Export Enquiry : 
Mr. Divay Rathee : +91-9968373086
Website: http://arb-bearings.com/contact-us.php 

How Bearing manufactures Knows Which Bearings Work For Your Application

Bearing manufactures produce bearing to allow relative motion that is linear or rotational between two parts. Bearings are very important part in motion and mechanical technologies and act as anti friction. Bearings basically reduce friction by using either balls or rollers that is by its shape and material. Have you ever wondered that things roll better than sliding? If parts slide over one another, friction is created and that tends to slow down the speed. But, if the parts roll over one another, friction is greatly reduced. This is the simple concept behind bearings manufacture.

Besides bearings, there are other components as well such as clutches, torque limiters, rotary dampers and rollers that are used in equipments and machines to ensure maximum efficiency with reduced friction.

Bearing manufactures differentiate bearings according to the motion, principle of operation and the direction of load application.

There exist various types of bearings ranging from plastic bearings miniature bearings to steel bearings, each used for different application and purpose. The most common type of bearings is the ball bearings that are used in inline skates as well as hard drives. These bearings are useful in the case when the load is relatively small and can handle both thrust and radial loads.

It is plastic bearings that is gaining in popularity and is the best choice especially in the foods industry. This is because plastic bearings are good in both conditions such as wet and corrosive. These plastic bearings are again non magnetic and extremely resistant to corrosion. Plastic bearings find its uses in vending machines, refrigerators and in office furniture as well.

There are steel bearings too that are basically high-load precision bearings and primary field of application of these bearings are in tool chests, kitchen equipments, conveyors and in high load cabinets as well. There exist other types of precision bearing products as well such as the spherical bearings.

There exist miniature bearings that are corrosion resistant, light weight and cost effective. Primary applications of these bearings are found mainly in office equipment such as photocopiers, ticket dispensing machines and printers.

Of all the bearings, ball bearings are the most cost effective as the cost of producing the balls used in these bearings is least expensive. The main purpose of the bearing manufacture is to reduce friction and support different type of loads such as radial and axle. With modern technology and latest innovations there are bearings that have longer life cycle and that makes it harder to destroy. These bearings are used in massage machines, steel doors, casters for furniture and rollers for guide of elevators.

ARB Bearings Limited
H-22, Udyog Nagar
New Delhi - 110041, Delhi, India
Phone: +(91)-(11)-25471274 / 25471255 / 25186300
Fax: +(91)-(11)-25475455 / 25470126
Email: info@arb-bearings.com, export@arb-bearings.com, sales@arb-bearings.com
For Export Enquiry : 
Mr. Divay Rathee : +91-9968373086
Website: http://arb-bearings.com/contact-us.php

Surplus Bearings And How They Can Help You Save

Every business wants to do it, save money on their overhead. But its not always as easy as it sounds. Many times, so much of our operating costs are fixed expenses, mortgage, advertising budgets, it make it really hard to find the fat to trim. But one place that most business owners fail to look is at their inventory.

Think about it, if you could cut the cost of the inventory that youre selling, you would lower your overhead and thus, increase your profit margin. Being in the transmission or automotive repair business, you often think that your prices for parts will never go down, so you wisely budget for them to stay where they are. (Or in some cases, maybe even go up.)

But just how do you do that? One great way is to buy your transmission bearings directly from the manufacturer. Buying up some of a manufacturers surplus, or excess allows you to get some of the parts you need at some great prices. The theory behind the surplus discount is that these manufacturers need the space in their warehouses so that they can continue to manufacture orders. These surplus parts are there, taking up that needed space, and have to go. So, they are willing to sell these items at a discounted rate. Many times, the manufacturer will give even deeper discounts to those buyers who in buy in bulk, just to get the bearings off of their shelves.

Just how much can you save by buying in surplus? Well, in all honesty, it depends on how much you buy. A large shipment may allow you to buy each piece priced below cost, or the manufacturers cost to make the product. If this is the case, then their loss is your gain, in a huge way. Imagine buying all of the transmission bearings youll need for the year, and getting them at a price cheaper than it costs to make them.talk about savings!

Buying from the manufacturer doesnt give all of the bells and whistles you would have by buying from a parts supplier, but those things are exactly why theres so much difference in the price. Having to pay for TV ads, and all of the other things you see at most auto supply stores simply adds to the price for each of those bearings.

Because youre purchasing from the manufacturer, youll incur additional charges for shipping, especially for smaller orders. This is simply because they usually have large shipments go out to their clients in semi-trucks, and it would be ridiculously expensive to hire an 18-wheeler to bring one small box of transmission bearings to your store.

Cutting the price of your inventory is an excellent way for an automotive service center to increase their profit margin. Its really just simple economics, the less you spend on your materials needed to provide service, in this case, transmission bearings, the more profit you have left over. Buy in surplus is a great way to cut the price of your inventory.

Contact Us

ARB Bearings Limited
H-22, Udyog Nagar
New Delhi - 110041, Delhi, India
Phone: +(91)-(11)-25471274 / 25471255 / 25186300
Fax: +(91)-(11)-25475455 / 25470126
Email: info@arb-bearings.com, export@arb-bearings.com, sales@arb-bearings.com
For Export Enquiry : 
Mr. Divay Rathee : +91-9968373086
Website: http://arb-bearings.com/contact-us.php

How Buying Bearings From A Bankrupt Manufacturer Can Benefit Your Business

The automotive industry is undergoing a major overhaul, with the big three going through bankruptcy, and parts suppliers going under on what seems like a daily basis. With all of these issues going on, more and more people are looking to keep their existing vehicles. Now, automotive repair shops are seeing more business than ever. But this rise in business in the auto repair industry has not translated to the parts manufacturers, because theres simply not enough volume there to replace the missing order from the automotive factories.

But if youre in the automotive repair business, their loss can be your gain. Because these companies are closing their doors, they are liquidating their inventories at extremely low prices. That means more savings on the parts you need to provide services for your customers. Not to mention that we all know that the more money you save on your parts, the more profits that you will have in your pockets. So lets find out just how we can buy these bearings from bankrupt manufacturers, and save your business some overhead.

The first thing you need to do is contact the manufacturers sales department, and find out if their assets, (in this case, the bearings,) or their inventory has been liquidated. If they have, youre too late for this manufacturer, but youll find another one. If they do, know just how many bearings you want to order, and simply find out the price for your order. That part seems simple enough, but just how does this save us money?

To understand this, you have to understand the basic principles of how bankruptcy works. When filing for bankruptcy, most businesses file for Chapter 13 bankruptcy. This type of bankruptcy is filed, and after the proceedings, it is required, (and usually best for the best in question, that the business liquidate of their assets. This helps the company because the liquidation will help to lower the amount that has to be paid back to their lenders. So these suppliers will be desperate to move their inventory, which means that youll be able to get the bearings you need for your business at a great price.

Because the bankrupt business is going to be more willing to work with you on prices, you may be able to negotiate pricing based on bulk orders, free shipping, or any other pricing option that you can think of. They may be less-willing to allow you to finance the purchase, because for many of them, bad financial transactions are a part of the reason why theyre filing for bankruptcy.

By buying from a bankrupt parts supplier, you can save yourself a great deal of money on your supplies. This extra savings will you to do so many things, from paying off debts that your business may owe, to expanding your companys marketing and advertisement, thus allowing you to bring in more customers and make more profits. Just by simply lowering your overhead costs, you can increase your profits.

Contact Us

ARB Bearings Limited
H-22, Udyog Nagar
New Delhi - 110041, Delhi, India
Phone: +(91)-(11)-25471274 / 25471255 / 25186300
Fax: +(91)-(11)-25475455 / 25470126
Email: info@arb-bearings.com, export@arb-bearings.com, sales@arb-bearings.com
For Export Enquiry : 
Mr. Divay Rathee : +91-9968373086
Website: http://arb-bearings.com/contact-us.php