Bearings of any type are not ever-lasting components. Over time, they experience wear, corrosion, and other forms of degradation depending on the applications in which they are installed. However, it is not common for them to fail without reason. Consisting of a donut-shaped piece of material, bearings are intended to restrict or limit the motion of a machine’s moving parts while simultaneously reducing friction between such parts.
 
Thrust bearings, in particular, are a type of rotary bearing that is designed to resist thrust and support axial forces caused by helical gears in vehicle gearboxes. They fail on rare occasions, but when they do, this results in catastrophic consequences for engines. Beyond significant repair costs, their failure poses a serious safety threat to all personnel in the general area.
 
In an engine block, thrust bearings are positioned into grooves formed in the block’s webbing. Their main function is to limit the crankshaft’s forward and backward movement by restricting the crankshaft within a certain area of motion. By controlling these movements, tolerances within the entire rotating assembly can be preserved. This is especially important at high revolutions to maintain the engine’s service life. To better understand why thrust bearings fail, we will outline three of the most common causes below.
 
Contaminants and Surface Finish
 
Dirt and contaminants can damage every type of bearing, making it the leading cause of failure. To prevent the build up of grime, an effective maintenance schedule should be put in place and cleaning should be carried out with clean clothes and refined oil. Additionally, polishing the thrust surface frequently is also paramount, and this can be achieved with a polishing machine. If any grinding marks are present on the crankshaft face, they can act like wiper blades to remove the thrust bearing’s surface oil film.
 
Misalignment
 
Without proper cleaning and maintenance, thrust bearings can become misaligned and grind against its surface which may generate sparking. This produces “hot spots” on the surface which can damage the overall operation of the bearing. It is worth noting that the thrust surface should always be set at 90 degrees to the crankshaft center-line, creating a thrust face that is square to the axis of the main bearing journal.
 
Overloading
 
Overloading is typically caused by operator error or a distorted crankcase. In either case, overloading causes unnecessary wear and tear, as well as thrust bearing failure. To avoid overloading, the operator must not idle excessively or attempt to “hot rod.” If the problem sources from the crankcase, any additional loads should be removed and the bearing can be repaired using a 90 degree oil routine.
 
Conclusion
 
Simplified Purchasing is an online distributor of bearings, fasteners, and other related components that are vital to the proper functionality of engines and other machines. With over 2 billion new, used, obsolete, and hard-to-find options, customers can meet operational requirements with ease. Backed by rapid lead times and unbeatable cost savings on thousands of parts. As our supply chain network stretches across the United States, we can offer expedited shipping services on select in-stock items for both domestic and international customers.
 
Get started on a competitive quote for any featured item(s), and within 15 minutes of submitting a completed Request for Quote (RFQ) form, a dedicated representative will reach out with a customized solution. We only ask that you include target prices, desired quantities, and expected shipping time frames, so we can better tailor a quote that works for you. For additional questions about our other offered services, call or email us at any time; we are available around-the-clock. 


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A shaft bearing is a common mechanical component, often placed within assemblies to bear applied loads while facilitating the rotational or sliding movement between parts. With their general, yet important, role, shaft bearings commonly find use in a wide variety of applications ranging from industrial machinery to aerospace vehicles. To accommodate a diverse set of industries and needs, shaft bearings come in various types and designs, each varying in its qualities and characteristics.
 
The plain bearing is one of the most common forms of shaft bearing, coming in the form of a simplistic, low cost element that features a cylindrical sleeve and internal shaft. The sleeve is generally constructed from a low friction material, that of which may be graphite, bronze, or plastic. The low friction material is crucial for the functionality of the shaft, allowing it to rotate within the sleeve. For more basic designs, plain bearing components are most often implemented within mechanical applications where ample lubrication and high tolerances are not necessary. Despite this, plain bearings often wear over time as a result of the surface contact between the sleeve’s inner diameter and shaft outer diameter, reducing the overall service life of such components.
 
Alongside plain bearings, rolling-element bearings are also quite commonplace. A rolling bearing is generally more complex than a plain bearing, featuring spheres or small cylinders that roll between races for the means of taking on loads, reducing friction, and permitting tighter mechanical tolerances. All rolling-element bearings consist of three primary components, those of which are the inner race, outer race, and rolling mechanical components placed between each. The ball bearing is a subtype of rolling-element bearing, featuring spheres between races that mitigate friction. For other types, the rolling elements may be less spherical as various cylindrical shaped rollers are common.
 
Depending on the environment that a shaft bearing will operate in, there are various accessories that one may take advantage of. For instance, contamination may be a concern in some installations, posing a risk to the health, performance, and lifespan of bearings. Through the use of seals and shields, internal components can be guarded as necessary. The size of the bearing itself is also an important aspect to consider as there is a wide variety of sizes that are in standard and metric values. Generally, one should always take into account operational speeds, lubrication requirements, size, weight, costs, safety, applied loads, bearing surface values, and much more.
 
If one requires a more robust option for an aircraft or automotive assembly, a high precision shaft bearing will often provide for increased reliability and extended service intervals. Nevertheless, such quality bearings will often be more expensive than their standard counterparts, making the choice a balance between requirements and cost. Regardless of whether you are searching for new bearings, replacement components, or are simply viewing the market, there is no better sourcing solution than Simplified Purchasing.
 
Simplified Purchasing is a website owned and operated by ASAP Semiconductor, and we offer customers access to over 2 billion new, used, obsolete, and hard-to-find products that have been sourced from leading global manufacturers that we trust. Take the time to explore our expansive set of offerings as you see fit, and our team is always ready to assist you with customized quotes for your comparisons and unmatched lead times. Even if you are facing a time constraint and need parts fast, we can expedite the shipping process using our expansive supply chain network stretching across the United States, Canada, and the United Kingdom. Experience the future of part procurement today with Simplified Purchasing when you get in touch with one of our representatives. 


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In general, bearings are specialized components that assist an object’s rotation. Typically supporting the shaft that rotates inside machinery, bearings are found in automobiles, aircraft, electric generators, and more. As they find countless uses, bearings are available in varying types, one of which is called a rolling bearing.
 
Rolling bearings, or roller bearings, are utilized to replace sliding movement with low friction, such as aiding in rolling motions observed in rotary applications. The principle subtypes of this category of bearings include cylindrical, spherical, tapered, and needle roller variations. Before getting into each type’s distinctions, we will cover their design.
 
Consisting of two rings, rolling elements, and a cage, roller bearings are usually classified as radial bearings or thrust bearings, depending on the direction of the main load. Additionally, they can be further classified by the type of rolling element used, whether that be  balls or rolling elements. Nonetheless, roller bearings of any type are designed with advantageous characteristics.
 
When compared with plain bearings or other types, rolling bearings offer many advantages, the first being that their starting torque and friction are low while the starting torque and running torque are small. Furthermore, with the onset of worldwide standardization, rolling bearings are internationally available, and interchangeable.
 
Other advantages include that their maintenance, replacement, and inspection are straightforward processes as the structure of the rolling bearings is simple. More than that, a majority of rolling bearings have the ability to handle radial and axial loads simultaneously or independently. Lastly, they can be utilized under a wide range of temperatures, and they can be preloaded to produce a negative clearance, achieving greater rigidity.
 
Cylindrical Roller Bearings
 
This type of rolling bearing is equipped with the ability to handle high radial-loads and moderate thrust loads. They contain cylindrically-shaped rollers that are either crowned or end-relieved to reduce stress concentrations. They are similar to needle roller bearings with the exception that the dimensions of diameter and roller length are closer in magnitude.
 
Spherical Roller Bearings
 
Self-aligning in nature and double-row in design, spherical roller bearings are considered combination radial and thrust bearings. These bearings utilize barrel-shaped or crown-shaped rollers that are situated between the inner ring. The inner ring itself has two raceways, while the outer ring has one spherical raceway. It is important to note that spherical roller bearings can handle heavy radial loads and some axial loads in either direction.
 
Tapered Roller Bearings
 
Tapered roller bearings consist of an inner ring (cone), outer ring (cup), cage, and rollers. It is important to keep in mind that the cage and rollers can be profiled to distribute loads evenly across the roller. During operation, tapered roller bearings create a line of contact between the rolling element and the raceway, distributing loads across a larger surface area. Depending on the contact angle, they can be subdivided into three types, those of which include normal angle, medium angle, and steep angle variations.
 
Needle Roller Bearings
 
The last type of rolling bearings are of the needle roller variety. They are considered a type of cylindrical roller bearing where the length of the roller is much larger than the diameter. In particular, needle roller bearings are designed for radial load applications where a low profile is desired. There are numerous types of needle roller bearings, some of which have no inner rings or cages. As such, one must be well aware of their application’s requirements prior to making a rolling bearing purchase.
 
Conclusion
 
If you find yourself in need of rolling bearings, radial bearing assemblies, radial bearing shoes, or other related components, rely on Simplified Purchasing. Simplified Purchasing is an online distributor of electronic parts, aviation products, NSN components, and more. With an inventory of over 2 billion ready-to-purchase items, customers can find everything they need with ease. Get started with a competitive quote which you can request through our Instant RFQ service, and let Simplified Purchasing fulfill your operational requirements today!


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Bearings are specialized mechanical elements that assist objects’ rotation while simultaneously reducing friction between moving parts. Thin section bearings are a type of standard bearing, but differentiate themselves in their subtle cross sections, making them highly sensitive to shaft and housing tolerances. As such, using them in assemblies should be done with care, and finding the proper bearing for your applications is paramount.


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Bearings are components that are common to countless assemblies, often being used to facilitate and constrain motion while reducing friction between moving parts. Axle and wheel bearings in particular are two components that are common to automobiles and similar vehicles, allowing for wheels to turn with freedom while ensuring that the weight of the vehicle is supported and that assemblies have proper alignment. As both bearings are crucial for the standard functionality of wheels, it is important that one amply understands their functionality and maintenance.


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Built as a rolling mechanical assembly, bearings facilitate different types of load, thrust, and radial movement between moving parts along a track. Constructed in multiple forms to support various applications, bearings are used to constrain relative motion along a track while ensuring a desired motion is achieved. This dramatically reduces friction between all moving parts, providing high rotational speeds for rotating or oscillating machinery. Operating off of their own unique set of principles, common bearing types include: plain bearings, rolling element bearings (i.e., ball bearings, roller bearings), jewel bearings, fluid bearings, magnetic bearings, flexure bearings, and more.


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Friction refers to the resistance that a surface faces when moving across another, often being a condition that can wear components down and prevent them from optimally performing. For the wheels of an automobile, aircraft, or other ground vehicles, smooth rotation with minimal friction is crucial for forward movement and standard operations. Wheel bearings are a primary component of countless wheel assemblies, coming in the form of Ball bearings and roller bearings that facilitate rotation. As a crucial part present in various vehicles, regular maintenance and inspection is required to prevent equipment damage and failures.


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Bearings are machine components that are present in countless assemblies, capable of mitigating the friction generated between moving parts while also constraining motion. As bearings often take on a variety of radial and axial loads when implemented within numerous construction types, there are many forms of bearings that have been developed over the years to accommodate different applications. Plain and sleeve bearings are two types that are often found in many assemblies, the latter being a specific form of plain bearing. As common machine elements to countless assemblies, having a general understanding of both types can be beneficial when searching for a bearing solution for a particular need.


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Ball bearings and roller bearings look and function similarly to one another. Despite this, there are many differences in the way each type of bearing is used. In this blog, we will discuss the differences between ball and roller bearings.


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Bearings are components that are often found in many assemblies and apparatuses that feature moving parts. As components that can both reduce the friction between moving surfaces and facilitate the motion of various parts, bearings are crucial for the operations of countless assemblies and can extend their service lives by mitigating wear. While there are many types of bearings commonly used for various applications, the two primary categories used to classify bearings are whether they utilize round balls or cylindrical sleeves for their construction. As both designs will provide different benefits that may cater to specific applications, understanding their differences is highly beneficial.


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