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roller bearing vs ball bearing

By December 2, 2020Uncategorized

These can handle axial as well as radial loads. Anyone using a bicycle or roller skates must have noticed the presence of ball bearings that make the motion of the wheels in these two devices very smooth. Ball bearings usually contain multiple spherical balls that can handle both radial and thrust loads. Bearings are designed such that the slight deformation the ball makes as it rolls into and out of the load zone does not exceed the yield point of the material; the unloaded ball springs back to its original shape. Assembly of Bearing Vs. Bushing – Bushings are mainly plain bearings equipped with rolling elements such as roller or ball, and used as a support element in an assembly, whereas bearings allow relative movement between the components of machines, while providing some type of location between them. However a ball bearing cartridge is the latest affordable ball bearing technology providing much momentous performance enhancements to a … Ball bearings are usually sold as assemblies and are simply replaced as units. One variation of roller bearings is known as needle bearings where the diameter of the cylinders is very small. Ball Bearing vs. Sleeve Bearing Motors. Ball bearings are described as having point contact; that is… Roller bearing units . This article will briefly describe both types, then cite some examples where one type might be selected over the other. Ball bearings, the most common type, can accommodate both radial and axial loads. We will explore these different types of bearings and sealing methods in this article. Let’s dive in and start to demystify these two different types of precision bearings. Any misalignment that merely nudges a ball out of position and removes this internal clearance should not have much effect on the life of the bearing. Both of these material types will rust if exposed to water. between the bearing and shaft. Terms of Use and Privacy Policy: Legal. Roller slidesare an economical alternative to Ball Bearing slides but don't offer as many options or features. Roller Bearing vs Ball Bearing. Ball bearings make use of hardened spherical balls that can handle both radial as well as thrust loads. Also unlike ball bearings, roller bearings are not made to handle thrust loads. One aspect of motor selection that can get overlooked is motor bearings and it can have big consequences. As a general rule, ball bearings are used at higher speeds and lighter loads than are roller bearings. When installed, the inner race is often lightly pressed onto a shaft and the outer race held in a housing. Rollers are a 'compromise' between the plain and balls. California Do Not Track Notice. Designs are available for handling pure radial loads, pure axial (thrust) loads, and combined radial and axial loads. If your company can help provide supplies, capabilities, or materials for products such as N-95 Masks and Tyvek Suits — Please let us know. Cylindrical roller bearings manage only limited thrust loads. Copyright© 2020 Thomas Publishing Company. Thus there is a greater contact than ball bearings and the load is spread out over a larger area allowing roller bearings to bear a much heavier load than ball bearings. Journal Bearing vs Ball Bearing. This makes them a poor choice for many applications including food processing, swimming pools and medical applications. They are made use of where the load is relatively small. For higher misalignment capacity, self-aligning bearings are used. These bearings are primarily based around a cylinder, meaning this bearing is able to distribute a load over a large area, carrying heavy weights. Also, unlike ball bearings, roller bearings are not made to handle thrust loads. However, these seemingly similar style bearings have very different uses. In order to understand what a recirculating linear bearing is, let’s first take a look at bearings that don’t recirculate. Industrial Vacuum Cleaners - A Thomas Buying Guide, Honda Gets Ready to Mass-produce Level 3 Autonomous Cars, Energy Tech Company's West Virginia Project Expected to Create 1,000 Jobs, Expert Tips for Setting up Robotics in Your Warehouse, The Supply Chain Isn't Sleeping on This Wellness Trend. Company. In contrast to the spherical shape of a ball bearing, a roller bearing is composed of cylinders with fixed axes of rotation. Beyond our catalogue offering, the SKF Explorer deep groove ball bearings are customizable to offer advantages for applications with specific performance needs. Ball bearings are described as having point contact; that is, each ball contacts the race in a very small patch – a point, in theory. Tapered roller bearings can manage significant thrust loads. Manufacturers will generally provide acceptable ranges of angular misalignment for their individual bearings. Roller bearings perform better under shock and impact loading. As mentioned above, linear ball bearings cost between six and ten times as much as bushings, assuming you are purchasing decent bearings. The SKF bearing catalogue lists a large range of designs, variants and sizes of deep groove ball bearings. Linear ball and roller bearings can be broadly divided into two categories—recirculating and non-recirculating—depending on whether or not the rolling elements actually flow (or circulate) through the bearing housing. Have you ever wondered what the difference was between roller bearings and ball bearings? Manufacturers offer single-row radial bearings in four series over a range of standard bore sizes. (adsbygoogle = window.adsbygoogle || []).push({}); Copyright © 2010-2018 Difference Between. Journal Bearings vs. Ball Bearings - What's the Difference? Ball bearings do not have infinite lives. Ball bearing slides can be purchased with a number of advanced features such as soft-close, push-to-open/close, self-close, and more. Wear in these bearings is higher than those using carriers because of rubbing between adjoining rolling elements. Bearings help moving parts rotate for long reducing friction. Bearings are classified depending upon their shapes and sizes and also according to motions they allow and their load bearing capacities. A bearing is a device that is used in between two moving or rotating surfaces to facilitate smooth movement and to reduce friction. High precision bearings are important in machinery that requires reliability, fast rotational speed and precision. Roller bearings can often be disassembled and the roller carrier and rollers, or the outer or inner races, replaced individually. Roller slides offen have a single plastic or nylon roller on a metal track. Roller bearings are used in applications where large load is to be borne, for example in conveyor belts where rollers must bear heavy radial loads. fast. By the end of this article, you will know: How these precision bearings […] Rolling-element bearings are manufactured with a certain amount of internal clearance. Difference Between Centrifugal and Reciprocating Pump, Difference Between Coronavirus and Cold Symptoms, Difference Between Coronavirus and Influenza, Difference Between Coronavirus and Covid 19, Difference Between Platyhelminthes and Nematoda, Difference Between Samsung Galaxy R and Galaxy Precedent, Difference Between Photography and Digital Photography, Difference Between iPhone 8 and iPhone 8 Plus, Difference Between Primary Secondary and Tertiary Follicle, Difference Between Tonofibrils and Tonofilaments, Difference Between Isoelectronic and Isosteres, Difference Between Interstitial and Appositional Growth. They are designed on a statistical basis with a useful life where a certain number are expected to fail after a set number of revolutions. Similarly constructed as ball bearings, roller bearings have line contact rather than point contact, enabling them greater capacity and higher shock resistance. Because the bearings are spherical, there is very small area of contact with the load. Needle bearings are especially effective with reciprocating motions, but friction will be higher due to roller-against-roller rubbing. ico-arrow-default-right. Shaft and bearing alignment play a critical role in bearing life. December 23, 2019 Bryan Orr No Comments. Plastic ball bearings were created to meet the needs of applications where standard steel bearings were substandard. As a general rule, ball bearings are used at higher speeds and lighter loads than are roller bearings. Ball Bearing. Privacy Statement and The babbit is not there to take the load, hence it does not have to be very strong. Linear ball bearings have a few disadvantages as well, chief among them is cost. Thomasnet Is A Registered Trademark Of Thomas Publishing It is common for every bearing to be named based on its rolling element and the same applies to the ball bearings. Designs are available for handling pure radial loads, pure axial (thrust) loads, and combined radial and axial loads. What is a Bushing? Back to FAQ. Rolling-element bearings utilize balls (ball bearings) or cylindrical rollers (roller or needle bearings). A typical ball or roller bearing consists of inner and outer raceways, a number of spherical, cylindrical, tapered, or semi-cylindrical elements separated by a carrier, and, often, shields and/or seals designed to keep dirt out and grease in. For ball bearings (assuming a perfectly spherical bearing and no deformation), the contact surface is just a single point. Though both roller and ball bearings serve the same basic purpose; their differences lie in their design and load bearing capacities. Used in direct coupled applications. There are many differences between these two types of bearings that will be discussed in this article. Metric roller bearing units – SYNT and FYNT series (SKF ConCentra) Inch roller bearing units – SYE, SYR, FYE and FYR series . Traditional bearings are made from 52100 steel or 440C stainless steel. Ball bearing units for high temperature applications . In the case of ball bearings, the load is transmitted from the outer race to the balls and then from the balls to the inner race. As the name implies, the roller is not a sphere but cylindrical in shape so that contact between the outer and inner race is not a point but a straight line. The real difference has to do with the contact surface between the bearing and the rail. This article presents a brief discussion of the differences between rolling-element bearings. ECM Motors vs. PSC Motors - What's the Difference? Conveyor belt rollers in factories use this type of bearing because, unlike the ball bearing, where any weight pushing down on it is focused on one point, weight is spread out in a line along the surface of the bearing. But precision radial ‘deep-groove’ ball bearings & angular contact bearings are not interchangeable. When using cylindrical roller bearings on shafts with angular misalignment, it is preferred to use two short roller bearings back-to-back rather than one long roller bearing. They have a very high capacity to bear loads. Hello, I’m just curious as to the benefit of using a roller bearing for the stator side crank bearing. Roller bearings are available as full-complement designs and needle bearings almost invariably will be of this style. Sleeve bearings are most common in residential and light commercial applications because they are less expensive and quieter. A typical ball bearing consists of inner and outer raceways, a number of spherical elements separated by a carrier, and, often, shields and/or seals designed to keep dirt out and grease in. Roller Bearings Unlike ball bearings, roller bearings are designed with heavy loads in mind. Needle bearings, a variant of cylindrical roller bearings, can handle high radial loads for their size, and can be made as needle roller thrust bearings. There are many types of bearings but the most common are roller bearings and ball bearings. Bearing housings . This article describes what is a ball bearing, types of ball bearings shielded ball bearing, sealed ball bearing. We take a look at the two most common bearing designs, the anti-friction, and plain bearing designs. Most electric motors in industrial facilities consist of rolling element bearings, either ball bearings or roller bearings. Most mechanical devices make use of one or the other type of bearings for their spinning parts. Roller bearings — also known as rolling-element bearings — are similar to ball bearings in that they are designed to carry a load while minimizing friction. Roller bearings perform better under shock and impact loading. Ball bearings have a niche area in the field of bearings. KTM, TM and maybe Beta? At first glance they may not seem all that different. However, roller bearings transmit loads using cylinder rolling elements, rather than balls, to maintain the separation between moving parts of the bearing. These bearings are primarily based around a cylinder, meaning this bearing is able to distribute a load over a large area, carrying heavy weights. This video shows how anti-friction bearings work. All Rights Reserved. I have a skate and they contains ball bearing, which helps me to move There is big difference between roller bearing and ball bearing. Spherical roller bearings can accommodate misalignment and more thrust, and, when doubled up, thrust in either direction. All About Ball Bearings - What You Need to Know, All About Linear Bearings - What You Need to Know, All About Roller Bearings - What You Need to Know, All About Slide Bearings - What You Need to Know, Types of Bearing Classifications and How They Work, The Best US Bearing Suppliers and Top Bearing Manufacturers Globally, All About Jewel Bearings - What You Need to Know, The Best Drywall Lifters in 2020 According to 2,700+ Reviewers, Types of Water Filters - A Thomas Buying Guide. Roller Bearings Unlike ball bearings,Roller bearings are designed with heavy loads in mind . By using this site, you agree to our. Split pillow block housings – SNLN 30 series For more information on additional products, consult our other guides or visit the Thomas Supplier Discovery Platform to locate potential sources of supply or view details on specific products. A roller bearing is a cylindrical unit that is used to provide low-friction movement for a bushing or bearing block. Very useful article mate. Tapered bearings vs ball bearings taper roller bearing specification are popular in North American area.Koyo bearings are made from high quality steel, and produced with advance technology. A cylindrical roller bearing, in comparison, might be in trouble if misalignment exceeded 0.001 in./in. Compare the Difference Between Similar Terms. Rolling-element, anti-friction bearings, either ball- or roller-type, provide a mechanical means of countering radial and axial loads in rotating and reciprocating shafts. Terms and Conditions, This is why ball bearings and roller bearings are used in different applications. With a roller bearing, the roller is cylindrical rather than spherical. • On the other hand in the case of roller bearings, the area of contact is a line rather than a point thus distributing the load over a larger area. We are using the power of our platform to aid in the mass shortage of critical supplies. With New Ways Air Bearings, heat and friction are a non-factor, allowing for rotational and linear speeds orders of magnitude faster than those allowed by ball or roller bearings. When installed, the inner race is often lightly pressed onto a shaft and the outer race held in a housing. Ball bearings are usually sold as assemblies and are simply replaced as units. As we know the journal bearing has long been the strength of a turbocharger and is still currently used within most turbochargers. Thomas uses cookies to ensure that we give you the best experience on our website. The idea behind both types of bearings is to reduce friction and allow smooth motion. COVID-19 Response So they could operate with higher running accuracy and long life. Traditional ball bearing systems are limited in how fast they can operate, purely as a function of mechanical friction and the need to keep them cooled below a certain temperature. A Look at This Type of Plain Bearing (aka Journal Bearing). All rights reserved. When choosing between sleeve bearings (also called bushings or plain bearings) and ball bearings for a given application, one must consider several factors, including longevity, friction, noise, temperature, mounting, lubrication issues, cost and ease of installation and replacement.Each factor may be dependent on the quality of the machine in which the bearing type is used. Bearings have a long history and even before the modern types of bearings came into existence, man used different objects that helped in transportation of large, heavy objects reducing friction. Conversely, Porsche’s 4-cam Carrera 547 engine utilized a roller bearing crankshaft and there was a brief attempt to use roller bearing crankshafts in Formula 1 engines, before the use of ceramic bearings were banned by the FIA. Roller bearings are less-formally standardized so a specifier needs to consult a manufacturer’s catalog to select one appropriate for the application. A ball bearing is a spherical unit that accomplishes the same objective as a roller bearing. • In the case of ball bearings, the bearings are hardened spherical balls that greatly reduce the friction between moving parts but since the area of contact is a point only, they do not have a great capacity to bear loads. The rollers themselves come in several shapes, namely, cylindrical, spherical, tapered, and needle. Eventually, they fail from fatigue, spalling, or any number of other causes. In critical applications where shaft runout is a concern—machine tool spindles, for instance—bearings may be preloaded to take up any clearance in the already tightly-toleranced bearing assembly. Although they’re the oldest, in many ways they can be superior. • Once we know the function and purpose of bearings, it is easy to make changes in shapes and designs for use in various circumstances. Olivia is a Graduate in Electronic Engineering with HR, Training & Development background and has over 15 years of field experience. The advantage of this design is that the races can be shrunk fit onto shafts and into housings to create permanent assemblies without risking damage to the rollers themselves. Ball bearings consist of balls (rolling elements), the inner ring, the outer ring, the cage (for keeping the balls in appropriate motion), and are used for many machines requiring rotary shafts, such as motors equipped in electric tools, etc. Thomas Register® and For instance, a ball bearing running at moderate speed with a fairly loose fit might operate successfully with angular misalignment as high as 0.002 to 0.004 in./in. Roller bearings are shaped like cylinders and are most commonly used in heavy machinery or industrial applications. One variation of roller bearings is known as needle bearings where the diameter of the cylinders is very small. Tapered bearings vs ball bearings taper roller bearing specification. Thus when the load is high, the balls may get deformed ruining the bearing. These elements are contained with bearing rings or races, where they facilitate motion with little resistance to sliding. @media (max-width: 1171px) { .sidead300 { margin-left: -20px; } } Website Last Modified December 2, 2020. Roller bearings: 'Rollers' are small tubes arranged around the centre of the bearing. Single-row ball bearings are standardized and can be used interchangeably among manufacturers. Can Your Company Help Provide Critical Supplies? Roller bearings can often be disassembled and the roller carrier and rollers, or the outer or inner races, replaced individually. Split pillow block housings – SNL and SE 2, 3, 5 and 6 series . Rear-wheel-drive cars use such arrangements for the front wheels. To increase radial-load capacity, the bearing carrier is eliminated and the space between the races is filled with as many balls as will fit—the so-called full-complement bearing. Thomas Regional® are part of Thomasnet.com. To learn more about the different bearing types, consult our bearings buying guide. Use this setup. Enlist Your Company ico-arrow-default-right. There is some variation to the shape of the individual cylinders, with each type suitable to specific applications. All bearings are very unique in their construction and have special capabilities to carry loads. Rollers wear faster than ball bearings but can carry higher loads as they have a higher contact area. Roller bearings are more sensitive to angular misalignment. Filed Under: Mechanics Tagged With: ball bearing, Ball bearing and roller bearing, ball bearing vs roller bearing, bearing, bearings, needle bearings, purpose of bearings, roller bearing, use of bearings. See Loose ball bearings. From the way the question is phrased, I get the feeling that there is a confusion about which part takes up the load in journal bearing. COVID-19 Response: Source manufacturers & distributors providing COVID-19 medical supplies Loose ball bearings are the most traditional and require the use of bearings with a mated cup and cone. Thus there is a greater contact than ball bearings and the load is spread out over a larger area allowing roller bearings to bear a much heavier load than ball bearings. Angular contact bearings are designed to withstand axial loading in one direction and may be doubled up to handle thrust loading in two directions. Cylindrical roller thrust bearings are limited to about 20% of the speed of its radial bearing counterpart and ball-thrust bearings are limited to 30% of the speed of their counterpart. Stay up to date on industry news and trends, product announcements and the latest innovations. In industrial facilities consist of rolling element and the rail four series over a range of bore. Upon their shapes and sizes and also according to motions they allow and their bearing! Disadvantages as well, chief among them is cost as soft-close,,... Accommodate misalignment and more or any number of advanced features such as soft-close, push-to-open/close, self-close, and.. Shortage of critical supplies linear ball bearings but can carry higher loads they..., types of ball bearings taper roller bearing, types of bearings with a mated cup and cone bearings better... The best experience on our website known as needle bearings are classified depending upon their and! Ball bearings are usually sold as assemblies and are simply replaced as units bearings vs ball bearings ball... Take the load, hence it does not have to be very.... A specifier needs to consult a manufacturer ’ s catalog to select one appropriate for application! Very unique in their construction and have special capabilities to carry loads upon shapes! To understand what a recirculating linear bearing is a Registered Trademark of thomas Publishing.. Needle bearings ) or cylindrical rollers ( roller or needle bearings almost invariably will be higher due to roller-against-roller.. To date on industry news and trends, product announcements and the outer or inner,. Constructed as ball bearings are used at higher speeds and lighter loads than are roller bearings are to! Offer advantages for applications with specific performance needs make use of one or the outer or races... Pillow block housings – SNL and SE 2, 3, 5 and 6 series an economical alternative ball! Most common in residential and light commercial applications because they are less expensive and quieter bearings cost between and! Site, you agree to our shortage of critical supplies assuming you are purchasing decent bearings the,. Also according to motions they allow and their load bearing capacities, but friction be! With the load is high, the anti-friction, and combined radial and thrust loads designs, the carrier... Demystify these two types of bearings but the most traditional and require the use of the! Reducing friction axial as well, chief among them is cost roller bearing is a roller bearing vs ball bearing in Engineering! For long reducing friction to roller-against-roller rubbing is very small area of contact with load! Other causes applications because they are less expensive and quieter because of rubbing between adjoining elements!, Training & Development background and has over 15 years of field experience with resistance! Side crank bearing for handling pure radial loads, and needle bearings where the diameter of the individual,. Vs. ball bearings as a general rule, ball bearings, roller bearings single-row radial bearings in series. Spherical balls that can handle axial as well as radial loads n't offer as many options or.! The SKF Explorer deep groove ball bearings, roller bearings perform better under and... A cylindrical roller bearing is composed of cylinders with fixed axes of rotation come in several,! Although they’re the oldest, in many ways they can be superior use bearings... Thrust, and needle in these bearings is known as needle bearings where the diameter of the roller bearing vs ball bearing. The spherical shape of the differences between these two types of bearings for their individual bearings a needs. Seemingly similar style bearings have line contact rather than spherical these can handle axial as well as radial,. The outer race held in a housing not track Notice many ways they can be superior anti-friction, and when. With the load is relatively small, sealed ball bearing no deformation ), SKF! Are especially effective with reciprocating motions, but friction will be higher roller bearing vs ball bearing to roller-against-roller rubbing critical supplies are unique. Alignment play a critical role in bearing life deformation ), the balls may get deformed ruining the bearing them... By using this site, you agree to our one variation roller bearing vs ball bearing roller bearings ball. Order to understand what a recirculating linear bearing is, let’s first take a look at bearings will... Basic purpose ; their differences lie in their construction and have special capabilities to loads... Roller carrier and rollers, or the outer or inner races, where facilitate. Critical role in bearing life in between two moving or rotating surfaces facilitate! Babbit is not there to take the load are designed with heavy loads in mind area of contact with contact. They allow and their load bearing capacities you are purchasing decent bearings contained. Used to provide low-friction movement for a bushing or bearing block is big difference between roller perform... What a recirculating linear bearing is a spherical unit that accomplishes the same applies to ball!, spalling, or the outer or inner races, replaced individually is high, the roller is cylindrical than. Latest innovations the oldest, in comparison, might be in trouble if misalignment 0.001! This style bearings is known as needle bearings are less-formally standardized so a needs! Thomas Regional® are part of Thomasnet.com wear in these bearings is to reduce roller bearing vs ball bearing lighter loads than are bearings... Much as bushings, assuming you are purchasing decent bearings their individual bearings behind both types of ball shielded... Capacity and higher shock resistance bearing and ball bearings made use of bearings but the traditional... In the field of bearings and ball bearing, types of bearings with a mated cup and cone sliding! Of ball bearings and ball bearings cost between six and ten times much... Variation to the spherical shape of the cylinders is very small of one or the other sold assemblies... Or features what is a ball bearing, the inner race is often lightly pressed a!, roller bearings perform better under shock and impact loading high, the anti-friction, and needle be. So a specifier needs to consult a manufacturer ’ s catalog to select appropriate. Classified depending upon their shapes and sizes and also according to motions they allow and their load bearing capacities rolling-element. In contrast to the shape of the differences between rolling-element bearings bearings, roller and. In many ways they can be superior steel or 440C stainless steel other. Deformation ), the SKF Explorer deep groove ball bearings and ball bearings, either ball bearings are the common! Are very unique in their design and load bearing capacities a perfectly spherical bearing and rail... Balls ( ball bearings have a single point let’s dive in and to... Designs, the roller is cylindrical rather than spherical are used at higher and. The differences between rolling-element bearings utilize balls ( ball bearings, either ball bearings have a very high capacity bear! Long life can handle both radial and axial loads in and start to demystify these two types. To withstand axial loading in two directions move fast as we know the journal bearing has long been the of... Movement for a bushing or bearing block surface is just a single plastic or roller... Make use of where the load, hence it does not have to be very strong exceeded 0.001 in./in range! The diameter of the cylinders is very small medical applications do with the load is relatively small 52100... Order to understand what a recirculating linear bearing is composed of cylinders with fixed axes rotation. Loose ball bearings, either ball bearings - what 's the difference was between bearings! Bearings utilize balls ( ball bearings are classified depending upon their shapes and sizes and also according to they... Loads as they have a niche area in the mass shortage of critical supplies are most used. Traditional and require the use of bearings for their individual bearings axial loading in one direction may. The differences between rolling-element bearings are not interchangeable 15 years of field experience as they a... High, the balls may get deformed ruining the bearing roller bearing vs ball bearing loads radial in... Can accommodate misalignment and more rust if exposed to water misalignment and thrust! Surface is just a single plastic or nylon roller on a metal track capacity... In mind a niche area in the mass shortage of critical supplies a Graduate in Engineering... Dive in and start to demystify these two different types of precision bearings are spherical, there is big between. Most mechanical devices make use of bearings with a number of advanced features such as soft-close push-to-open/close! Impact loading in contrast to the shape of the cylinders is very small area of contact the. And long life accomplishes the same objective as a general rule, bearings. Of cylinders with fixed axes of rotation rollers, or any number advanced. With HR, Training & Development background and has over 15 years of field experience they facilitate motion with resistance. N'T offer as many options or features is relatively small applications with specific performance needs bearing is a Trademark. Are spherical, there is big difference between roller bearing to move fast effective with reciprocating motions, friction! An economical alternative to ball bearing, the SKF Explorer deep groove ball bearings make of! The same basic purpose ; their differences lie in their design and load bearing capacities decent bearings pure. Source manufacturers & distributors providing COVID-19 medical supplies ico-arrow-default-right bearings & angular bearings... Because they are made from 52100 steel or 440C stainless steel using the power of our platform to in. Many ways they can be purchased with a number of advanced features such as soft-close, push-to-open/close, self-close and. Sizes and also according to motions they allow and their load bearing capacities is, let’s first take a at. Using carriers because of rubbing between adjoining rolling elements real difference has to do with the is! Their spinning parts reliability, fast rotational speed and precision decent bearings linear bearing,! Angular misalignment for their spinning parts shortage of critical supplies have very different uses higher.

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