A thrust bearing, a type of rotary bearing, rotates between parts reducing friction and is designed to support an axial load (mostly in low-speed applications). It is the axial bearing that permits rotation between parts.
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As a global leader in the bearing industry, BMC provides custom solutions to lead your industry. We find solutions to get the bearing you need and reduce your long lead times. Whether that is a bearing that is modified, manufactured, or repaired to your specification, we can help you. In this article, we discuss thrust bearings, from designs to applications and more.
Chapter 1
What are Thrust Bearings, Types, and How Do They Work
Thrust bearings include a variety of bearings that assists axial loads or axial force. It is an axial bearing that permits rotation between parts. Thrust bearings support the axial thrust of both horizontal and vertical shafts.
The functions are to prevent the shaft from drifting in the axial direction and to transfer thrust loads applied on the shaft.
Source: YouTube, Shop Talk - What Are Thrust Bearings! by DIY3DTECH
Thrust bearings are generally seated against a raised thrust collar around the shaft. The thrust collar allows the axial load to be transferred from the shaft to the bearing. Thrust bearings are typically used in pairs on each side of the thrust collar.
Depending on the usage or application, there are many types to choose from.
General types:
1. Flat land bearing - made of a single flat disc with grooves and no moving parts
2. Tilting pad bearing - consists of moveable metal plates called thrust shoes
Resource: All you need to know about Bearings Journal &Thrust Bearings
Types of Thrust Bearings that Support Axial Load
Thrust bearings support a force applied in the same direction as the shaft. They can be categorized into two major types: Thrust ball bearing and Thrust roller bearing. The thrust ball bearings are used to deliver high performance, while the thrust roller bearings are typically used in applications where high load-carrying capacity is needed.
- Thrust ball bearing
- used in low thrust applications where there is little axial load. They are available in two designs: single direction and double direction.
- Cylindrical thrust roller bearing
- give good carrying capacity.
- Tapered thrust roller bearing
- most commonly used in automotive applications. They can support greater thrust loads than the ball type due to the larger contact area. They are designed to accommodate combined loads, i.e., simultaneously acting radial and axial loads.
Four Thrust Bearings for Every Need
1. Oil-Embedded - used for applications with frequent starts and stops, the oil lubricates the bearing during startup
2. Dry-Running - operate with less friction and can work in high-temperature environments
3. Food-Grade - made of FDA listed materials for use in food applications
4. Corrosion-Resistant - high strength makes them suitable in marine and mining applications
Material Used in Thrust Bearings
The most common materials used to produce thrust bearings are stainless steel and ceramic. The cage is made of brass or steel, depending on the application.
Chapter 2
How to Select the Type of Bearing [Structures of Thrust Bearings]
When selecting the right bearing, it is essential the bearing fits the requirements for its use.
Meaning...
You must select the right bearing type based on the direction of the load.
Source: What are the Differences Between Bearings?
The force applied to a bearing is called the "load." There are the radial and axial loads applied to a bearing. The force applied vertically to the shaft is called the radial load, and the force applied in the same direction (parallel) as the shaft is called the axial load.
Radial bearings support the force that is applied vertically to the shaft. Thrust bearings support a force applied in the same direction as the shaft.
An axial or thrust bearing uses side by side races. The race on the side into which the shaft is inserted is called the shaft race. The race inserted into the housing is called the housing race. [source]
Chapter 3
Bearing Applications in Different Industries
Fortune Business Insights says the global ball bearing market size was USD 19.08 billion in and is projected to reach USD 21.90 billion by .
The types of bearings included in their forecast are self-aligning ball bearings, deep groove ball bearings, angular contact ball bearings, and others, as in thrust ball bearings.
Automotive, Industrial Machinery, Mining & Construction, Medical, and other industries such as Aerospace drive the market share.
Source: https://www.fortunebusinessinsights.com/industry-reports/ball-bearing-market-
"Industrial Machinery is anticipated to have substantial growth owing to the moderate need for these bearings in rotating the shafts of several machines." [source]
There are various types of thrust bearings, each with its strength. The unique bearings deliver different performance and load capacity.
Thrust ball bearings are used in industries such as aerospace, chemical industry and utilities. Thrust roller bearings are suitable for agriculture and other sectors that require high-load capacity.
Thrust bearings are also commonly used in automotive and marine applications. They are used in cars because the forward gears in modern car gearboxes use helical gears, which, while aiding in smoothness and noise reduction, cause axial forces that need to be dealt with. [source]
Benefits to Thrust Bearings
- They offer high reliability
- Provide high load capacity in harsh environments
- Simple mounting - the shaft and housing washers can be mounted separately
- Provide a wide assortment
- Availability
Roller thrust bearings have higher load carrying capacities than ball thrust bearings. The higher speed applications require oil lubrication.
Chapter 4
What Causes Thrust Bearing Failure and How to Avoid Them
When a bearing does fail, it is vital to determine the exact cause so adjustments can be made.
The three most common causes of thrust bearing failure are contaminants, misalignment, and overloading.
1. Contaminants - Contamination is one of the leading causes of bearing failure. Airborne dust, dirt, sand, and water are the most common ones that you run into, but chemicals and corrosives can also damage bearings.
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&#; What to look for: Watch for denting of rolling elements and raceways that cause vibration.
&#;&#; How to Fix it: Filter the lubricant and clean work areas, tools, fixtures and hands to reduce contamination risk.
2. Misalignment - Misalignments lead to excessive vibration and loads.
&#; What to look for: According to Bearing Failure: Causes and Cures, the most commonly found causes of misalignment include: bent shafts, dirt or burrs on the shaft or housing shoulders, shaft threads that are not square with shaft seats, and locking nuts with faces that are not square to the thread axis.
To prevent misalignment, there are a few best practices you can keep in mind.
&#;&#; How to Fix it: Ensure you inspect shafts and housing regularly, use precision-grade locknuts, and shim the housings as needed.
3. Overloading - Putting too much load on a bearing is another common cause of failure.
&#; What to look for: This may look like normal fatigue. You may see heaving rolling-element wear paths, evidence of overheating, and widespread fatigue areas.
&#;&#; How to Fix it: Reduce the load or consider a redesign using a bearing with greater capacity.
When a bearing fails, it negatively impacts your facility, your reputation, and your bottom line. Regular preventive measures can keep your bearings at peak performance for as long as possible, saving your business time and money.
There are preventative measures you can take to increase your bearing's lifespan and prevent improper wear on them. Read more from BDS, "What Causes Bearing Failures and Preventative Measures."
Other resources:
12 Reasons Why Bearings Fail
Bearing Failure: Causes and Cures
Conclusion
Machine failures are unpredictable and if you don&#;t have the backup bearings you need, you may be stuck with long-lead times, causing you to waste time and money.
At BMC you get a one-stop solution for all your bearings needs, including modification, manufacturing, and repair.
We've helped distributor branches all over the world get the bearing and power transmission products they need.
Talk to one of our bearing experts today to tell us what you need, and we can help you get started.
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Key to Axial Performance: In-Depth Exploration of the Unique Advantages
Thrust ball bearings, is a common type of ball bearing that differs from other ball bearings in that it doesn't have an inner and outer ring. Instead, it uses washers to replace them. This design makes thrust ball bearings more suitable for applications with limited space or restricted axial mounting positions.
(1) Thrust Ball Bearings Feature
Thrust ball bearings are composed of balls and two washers, the balls serve as the main load-carrying components and roll on the washers. The washers are usually made of metal and have specific groove shapes to accommodate the movement of the balls. One of the washers is called the upper washer, and the other is called the lower washer. The gap between the upper and lower washers allows the balls to move in the axial direction.
- Thrust ball bearings typically come in two types: single-direction and double-direction. Single-direction thrust ball bearings can only withstand axial loads in one direction, while double-direction thrust ball bearings can handle axial loads in two opposite directions.
- When using thrust ball bearings, it is essential to correctly install the upper and lower washers on the shaft and housing bore to ensure smooth transmission and support of the axial load.
Thrust ball bearings have smaller installation space requirements and offer flexibility, making them vital components in many mechanical devices. They are commonly found in applications such as automotive transmissions, clutches, engines, and industrial machinery. Since they don't have inner and outer rings, the selection and installation of washers are crucial for ensuring the proper operation of the bearings.
THRUST BALL BEARING PROSUCTS
In summary, thrust ball bearings use washers instead of inner and outer rings, providing smaller installation space requirements and flexibility. They are important bearings for withstanding axial loads and are commonly used in various mechanical devices. When using thrust ball bearings, it is important to select and install the washers correctly to ensure smooth transmission and support of the axial load. Additionally, proper lubrication and maintenance of the washers should be observed to prolong the bearing's lifespan and ensure reliable operation.
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Further Reading:
Thrust Bearing Catalogue: Explore Optimal Selections
Automotive Bearings: Thrust ball bearings are widely used in automotive components such as transmissions, clutches, drive shafts, and wheel hubs. They can withstand axial loads and provide smooth operation and high efficiency.
Electric Motor Bearings: In electric motor and compressor equipment, thrust ball bearings provide axial support to ensure smooth operation of rotating components.
Agricultural Machinery Bearings: In agricultural machinery equipment such as tractors, harvesters, and irrigation devices, thrust ball bearings can withstand soil pressure and axial loads to ensure the normal operation of the machinery during agricultural operations.
In summary, thrust ball bearings are widely used in automotive bearings, electric motor bearings, aerospace bearings, and agricultural machinery bearings. They provide reliable axial support and load-carrying capabilities in these fields, ensuring the proper operation of the equipment.
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Thrust Ball Bearings are common types of thrust bearings used to withstand axial or thrust loads.
(1) Thrust Ball Bearings
Thrust Ball Bearings are bearings that use spherical balls as rolling elements. They are composed of one or more spherical balls positioned within the bearing housing. Thrust ball bearings are typically used in low-speed applications and can handle small to medium axial loads. They offer advantages such as compact structure, easy assembly, and low cost. Common applications include automotive transmissions, fans, and household appliances.
Are you interested in learning more about Thrust Ball Bearing Manufacturers? Contact us today to secure an expert consultation!
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