The Ultimate Guide to Choosing thrust roller bearings

Thrust bearings are used to support thrust loads or axial loads applied to a shaft. Thrust bearings are divided into several categories based on rolling elements: balls, cylindrical rollers, Single Direction and Double Direction thrust bearings that can withstand axial load and radial load. Thrust bearings are available in a variety of design types and configurations to suit a variety of load capacities and applications. Ball thrust bearing series are available in inch, ISO metric and angular contact series. Single Direction inch and metric series thrust bearings are capable of handling relatively light loads in one direction, while angular contact series thrust bearings can handle a combination of radial and thrust loads in one or both directions. Cylindrical roller thrust bearing series include inch, metric, and self-aligning series, with one-way and two-way series respectively. The use of cylindrical roller designs provides greater thrust load capacity than ball thrust bearings of the same size. This greater capacity makes thrust bearings suitable for a wide range of applications and industries. Aubearing’s tapered roller thrust bearings have high load capacity and are suitable for many applications that require heavy thrust loads. This article describes the various types of thrust bearings, their basic designs, and their general applications.

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Thrust bearings, also called axial thrust bearings, can withstand axial loads. These loads are loads parallel to the axis in the machine. The two main components of a thrust bearing are the bearing housing and the rolling elements. The housing remains stationary and attached to the machine. The rolling elements rotate with the shaft. The rolling elements of a thrust bearing can be spherical or cylindrical (roller) shaped and made of metal or plastic. When a bearing is subjected to an axial load, the bearing distributes the load on its surface, allowing the shaft to rotate smoothly without excessive friction and wear. Since the thrust bearing is a detachable design, its maintenance method and cost are relatively simple. This means individual components can be removed and replaced. Therefore, thrust bearings can be repaired without replacing the entire bearing. Thrust bearings are used in a variety of mechanical systems, from automotive engines to industrial equipment, aerospace and other systems. Required for many high speed, high load applications with axial loads.

Thrust ball bearings are designed to carry thrust loads in one direction and are divided into ISO metric and inch series. Thrust ball bearings are separate bearings, including a shaft ring (matched with the journal), a seat ring (matched with the bearing seat), a set of steel balls and a cage. During installation, it can be easily matched with the journal and bearing seat respectively. In some low-speed applications, a complete set of balls without a cage is used to increase thrust capability. Ball thrust bearings are a good choice when lighter thrust load applications are encountered. Thrust ball bearings are dimensionally interchangeable with other bearing manufacturers and, in the case of the ISO series, they are dimensionally interchangeable through the base series part number. When applications require greater accuracy, thrust ball bearings can be manufactured to P5 accuracy. Thrust ball bearings include one-way thrust ball bearings, two-way thrust ball bearings, and angular contact thrust ball bearings according to different structures.

Double Direction Thrust Ball Bearing consists of three parts: a shaft ring, two seat rings and two steel ball-cage assemblies. The bearing is separate and each part can be installed independently. The weighing shaft ring matched with the shaft can bear the axial load in two directions and can fix the machine shaft in both directions. Such bearings must not bear any delivery radial loads. Thrust ball bearings also have a structure with a seat cushion. Since the mounting surface of the seat cushion is spherical, the bearing has self-aligning performance and can reduce the impact of installation errors.

Angular contact ball thrust bearings are designed to bear radial loads and thrust loads, and their large thrust carrying capacity is the main design feature. These bearings are of the imperial series and typically have a contact angle of approximately 50 degrees. Angular contact ball thrust bearings consist of a hardened and ground angular contact plate (with dowel holes for mounting) and a brass cage with precision balls. Single-way angular thrust ball bearings handle these loads in one direction, while double-way angular thrust ball bearings handle these loads in both directions. This design is primarily used at the bottom of vertical shaft applications to withstand large thrust loads while providing center alignment to the shaft.

The needle rollers of thrust needle roller bearings have a small diameter and are shaped like needles. Thrust needle roller bearings consist of an outer ring, an inner ring, a flange inserted into the contour and small diameter needle rollers. Small-diameter needle rollers can disperse axial loads while having high stiffness and load-bearing capacity. Thrust needle roller bearings are suitable for applications where space is limited. Thrust needle roller bearings are suitable for high-speed axial load requirements and can be used in CNC machine tool spindles, instruments, motors and other equipment. The disadvantage is that the number of needle rollers is small, which can easily lead to excessive rolling element clearance and short service life.

Type T tapered roller thrust bearings are designed with a cage and roller assembly and two identical thrust plates. The rollers have a common apex that allows for true rolling motion within the thrust plate. The tapered roller thrust bearing design also allows the use of rollers and therefore higher load carrying capacity. In this type of full complement bearing, adding rollers provides greater thrust capability. The added rollers increase friction within the bearing, making it suitable for low-speed applications. Our tapered roller thrust bearings are ideal for applications where high thrust loads and heavy shock loads may be encountered, such as crane hooks. Other vertical shaft applications include rock crushers and pulverized coal equipment.

Thrust spherical roller bearing is a kind of separation bearing. Its load action line has a certain angle with the bearing axis. Therefore, it has a good self-aligning function and the allowable angle error is 2-3 degrees. However, the allowable angular error decreases as the load applied to the bearing increases, and it can bear both axial and radial loads. It can be used in extremely heavy load situations and can run at high speeds. In order to prevent harmful slippage of the rollers and raceways during the bearing adjustment operation, a certain minimum axial load must be applied to the bearing. Spherical roller thrust bearings require less maintenance due to their low coefficient of friction. These bearings can operate at relatively high speeds due to the cage design and the consistency between the rollers and washers.

Radial bearing is a common bearing that mainly bears radial load from the shaft. The design of this type of bearing usually includes main components such as outer ring, inner ring, rolling elements and cage. When the rolling elements roll between the outer ring and the inner ring, friction and wear can be reduced, thereby improving the efficiency and life of the mechanical equipment. The main feature of a radial bearing is that it can only bear radial loads and cannot bear axial loads. If the equipment is required to support axial loads, other types of bearings or structural designs are often required, such as thrust bearings or angular contact bearings. The main categories of radial bearings are:

Both are types of bearings that play a role in supporting and carrying loads during mechanical operation.

Both have different bearing materials, such as bearing steel, ceramic, stainless steel, plastic, etc.

Both have balls and rollers as rolling elements.

Both have bearing seal designs

Both require maintenance and upkeep to ensure proper functioning and longevity.

Both need to consider lubrication issues during use to ensure their operating efficiency and extend their service life.

The fit between the shaft ring and the shaft of the thrust bearing is generally a transition fit, and the fit between the seat ring and the bearing seat hole is generally a clearance fit. Therefore, this kind of bearing is easier to install. The center shaft ring of the two-way thrust bearing should be fixed on the shaft to prevent rotation relative to the axis. When installing a thrust bearing, the verticality of the shaft ring and the shaft centerline should be checked. The method is to fix the dial indicator on the end face of the box shell, so that the contact head of the dial is on the raceway of the bearing shaft ring while rotating the bearing, while observing the dial indicator pointer. If the pointer is deflected, it means that the shaft ring and the center line of the shaft are not perpendicular. When the hole in the box shell is deep, an extended dial indicator can also be used for inspection. When a thrust bearing is installed correctly, its seat ring can automatically adapt to the rolling of the rolling elements to ensure that the rolling elements are located in the upper and lower raceways. If installed upside down, not only will the bearing not work properly, but also the mating surfaces will be severely worn. Since the difference between the shaft ring and the seat ring is not very obvious, extra care should be taken during assembly to avoid making mistakes. In addition, a gap of 0.2-0.5mm should be left between the thrust bearing seat ring and the bearing seat hole to compensate for errors caused by inaccurate parts processing and installation. When the center of the bearing ring deviates during operation, this gap will This ensures that it adjusts automatically to avoid contact and friction, allowing it to operate normally. Otherwise, severe damage to the bearing will occur.

Thrust bearings can be divided into two main categories: ball thrust bearings and roller thrust bearings.

Thrust bearings play a crucial role in many applications, including automotive, aerospace, energy, and industrial equipment, among others.

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｜Thrust Bearings Catalog

The thrust bearings catalog is an important reference for engineers and designers when selecting appropriate thrust bearings.

• Product Classification：Different types of thrust bearings are categorized, such as ball cushion type, roller type, and cylindrical roller type.

• Product Specifications：Specifications for each type of thrust bearing are listed, including dimensions, load capacity, speed ratings, etc.

Bearing No. (Flat type)

Bore(d)(mm)

Outer(D)(mm)

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T(mm)

F4-9M 4 9 4 F4-10M 4 10 4 F5-10M 5 10 4 F5-11M 5 11 4.5 F5-12M 5 12 4.5 F6-12M 6 12 4.5 F6-14M 6 14 5 F7-13M 7 13 4.5 F7-15M 7 15 5.5 F7-17M 7 17 6 F8-16M 8 16 5 F8-19M 8 19 7 F8-22M 8 22 7 F9-17M 9 17 5 F9-19M 9 19 6.5

Bearing No. (Flat type)

Bore(d)(mm)

Outer(D)(mm)

T(mm)

r(mm)

F9-20M 9 20 7 - F10-18M 10 18 5.5 - 10 24 9 0.5 10 26 11 1 F12-23M 12 23 7.5 - 12 26 9 0.5 12 28 11 1 15 28 9 0.5 15 32 12 1 17 30 9 0.5 17 35 12 1 20 35 10 0.5 20 40 14 1 25 42 11 1 25 47 15 1

 Complete Version of Ball Thrust Bearings Catalog

Bearing No.

Bearing No. (Thrust bearings plate)

Bearing No. (Bearings plate)

Dc1(mm)

Dc(mm)

DW(mm)

AXK AS LS 55 78 3 AXK AS LS 60 85 3 AXK AS LS 65 90 3 AXK AS LS 70 95 4 AXK AS LS 75 100 4 AXK AS LS 80 105 4 AXK AS LS 85 110 4 AXK AS LS 90 120 4 AXK AS LS 100 135 4 AXK AS LS 110 145 4 AXK AS LS 120 155 4 AXK AS LS 130 170 5 AXK AS LS 140 180 5 AXK AS LS 150 190 5 AXK AS LS 160 200 5

 Complete Version of Needle Roller Thrust Bearings Catalog

Thrust bearings play a crucial role in various mechanical applications, and selecting the appropriate thrust bearing is vital to ensuring the stability of equipment operation. By understanding the basic principles of thrust bearings and consulting relevant product catalogs, you can make better choices to meet your needs and ensure the performance and reliability of your equipment.

｜How to select thrust bearings?

Choosing the appropriate thrust bearings is a critical step in ensuring the smooth operation of the machinery.

Here are some important factors to consider when selecting the appropriate thrust bearings:

• Load Type and Magnitude: You need to determine the type and magnitude of the loads your application will bear to ensure that the selected bearings can effectively handle these loads.

• Operating Speed: If your application requires high-speed operation, ball thrust bearings may be a better choice. For larger loads, consider using roller thrust bearings.

• Installation Space: Consider the available installation space in your machinery to determine the appropriate size of thrust bearings.

Additionally, you should also consider the reputation of the manufacturer and the quality of the product to ensure that the thrust bearings you purchase have excellent durability and reliability.

Choosing the appropriate thrust bearings requires considering multiple factors, including load type and magnitude, operating speed, and installation space. By carefully considering these factors, you can find the thrust bearings that best suit your application, thereby ensuring smooth and reliable operation of your equipment.

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