Thrust bearings buying guide


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Are you looking for an efficient bearing to guarantee optimum performance in your mechanical application?

 

Welcome to our buying guide dedicated to bearings, essential parts for many mechanical applications. Choosing the right type of bearing is crucial to ensuring optimum performance and long life for your systems. In this guide, we'll explore ball, roller and needle bearings in detail, focusing on their technical characteristics, their differences and the key steps for selecting them

 
Choisir un roulement de butée

Are you looking for an efficient bearing to guarantee optimum performance in your mechanical application?

 

Welcome to our buying guide dedicated to bearings, essential parts for many mechanical applications. Choosing the right type of bearing is crucial to ensuring optimum performance and long life for your systems. In this guide, we'll explore ball, roller and needle bearings in detail, focusing on their technical characteristics, their differences and the key steps for selecting them

 
 

How do thrust bearings work?

 

Thrust bearings are used in applications requiring high-speed axial thrust. They consist of flat washers which surround balls or rollers. As the elements are separable, they are interchangeable. The shaft washer is fitted tightly on its bearing surface. The housing washer must be free to self-center. If the axial load of the unloaded bearing is insufficient, it is necessary to apply a preload by means of springs, to achieve the minimum dynamic axial load.

I. Why choose a ball thrust bearing?

 

Design :

There are two types of thrust ball bearing: single direction (1 row of balls) and double direction (2 rows of balls).

The single-acting thrust ball bearing accepts axial loads in one direction only, while the double-acting thrust ball bearing accepts axial loads in both directions.

The advantages of these bearings are limited. A minimum axial load is required to ensure that the balls run smoothly and the thrust bearing operates correctly. They are designed to accept axial loads only and must never be subjected to radial loads.

 

Advantages :

  • Interchangeable components, facilitating assembly, disassembly and maintenance inspections.
  • Shaft washers feature a ground bore for a tight fit. The housing washer bore is turned and its diameter is always greater than that of the shaft washer bore.

 

Applications :

 

Thrust ball bearings can be used for operating temperatures from -30°C to +150°C, limited by the lubricant.

Thrust bearings are commonly used in marine and aerospace applications. Other applications include food and beverage food and beverage processing medical devices, portable machine tools and a wide range of other applications.

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I. Why choose a ball thrust bearing?

 

Design :

There are two types of thrust ball bearing: single direction (1 row of balls) and double direction (2 rows of balls).

The single-acting thrust ball bearing accepts axial loads in one direction only, while the double-acting thrust ball bearing accepts axial loads in both directions.

The advantages of these bearings are limited. A minimum axial load is required to ensure that the balls run smoothly and the thrust bearing operates correctly. They are designed to accept axial loads only and must never be subjected to radial loads.

 

Advantages :

  • Interchangeable components, facilitating assembly, disassembly and maintenance inspections.
  • Shaft washers feature a ground bore for a tight fit. The housing washer bore is turned and its diameter is always greater than that of the shaft washer bore.

 

Applications :

 

Thrust ball bearings can be used for operating temperatures from -30°C to +150°C, limited by the lubricant.

Thrust bearings are commonly used in marine and aerospace applications. Other applications include food and beverage food and beverage processing medical devices, portable machine tools and a wide range of other applications.

II. Why choose a roller thrust bearing?

 

Design:

Available with cylindrical, tapered and spherical rollers, thrust bearings are made up of separable elements: washer-shaft, washer-housing, ball cage.

Roller thrust bearings are also designed to support axial loads, but differ in that their rolling elements are rollers instead of balls. This design enables them to handle greater axial loads than ball thrust bearings , although their speed limit is lower than that of ball thrust bearings.

 

Advantages :

Compared with thrust ball bearings, roller bearings are more powerful in terms of :

  • Load capacity: Roller thrust bearings are generally better suited to supporting high axial loads. Their configuration with cylindrical rollers offers a wider contact surface, enabling them to distribute the load more evenly and support higher loads.
  • Wear resistance: Thanks to their larger contact surface, roller thrust bearings tend to have lower wear than ball thrust bearings, making them more durable and extending their service life.
  • Sensitivity to shocks: Due to their robust design and load distribution over several rollers, roller thrust bearings are generally less sensitive to shocks and impacts.
  • Support for radial loads: Unlike ball thrust bearings, which are primarily designed for axial loads, some roller thrust bearing designs can also support limited radial loads (e.g. spherical roller bearings), making them more versatile in certain applications.

Roller thrust bearings are better suited to handling loads that undergo oscillating movements, making them suitable for certain applications where forces regularly change direction.

 

Applications :

Roller thrust bearings are used in applications where a high axial load must be supported, and where cylindrical or tapered rollers provide better load distribution.

In various industrial machines and equipment such as presses, rolling mills, cranes, hoists and machine tools, roller thrust bearings are used to support axial loads resulting from operation and mechanical movements.

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II. Why choose a roller thrust bearing?

 

Design:

Available with cylindrical, tapered and spherical rollers, thrust bearings are made up of separable elements: washer-shaft, washer-housing, ball cage.

Roller thrust bearings are also designed to support axial loads, but differ in that their rolling elements are rollers instead of balls. This design enables them to handle greater axial loads than ball thrust bearings , although their speed limit is lower than that of ball thrust bearings.

 

Advantages :

Compared with thrust ball bearings, roller bearings are more powerful in terms of :

  • Load capacity: Roller thrust bearings are generally better suited to supporting high axial loads. Their configuration with cylindrical rollers offers a wider contact surface, enabling them to distribute the load more evenly and support higher loads.
  • Wear resistance: Thanks to their larger contact surface, roller thrust bearings tend to have lower wear than ball thrust bearings, making them more durable and extending their service life.
  • Sensitivity to shocks: Due to their robust design and load distribution over several rollers, roller thrust bearings are generally less sensitive to shocks and impacts.
  • Support for radial loads: Unlike ball thrust bearings, which are primarily designed for axial loads, some roller thrust bearing designs can also support limited radial loads (e.g. spherical roller bearings), making them more versatile in certain applications.

Roller thrust bearings are better suited to handling loads that undergo oscillating movements, making them suitable for certain applications where forces regularly change direction.

 

Applications :

Roller thrust bearings are used in applications where a high axial load must be supported, and where cylindrical or tapered rollers provide better load distribution.

In various industrial machines and equipment such as presses, rolling mills, cranes, hoists and machine tools, roller thrust bearings are used to support axial loads resulting from operation and mechanical movements.

III. Why choose a needle roller thrust bearing?

 

Design:

Thrust needle roller bearings feature high rigidity in a minimum of axial space. They are ideally suited to environments where space is limited, such as gear assemblies. These types of bearings can be designed with or without a single raceway, and in some cases, the rolling elements can use surrounding machine parts as raceways. Thanks to their design, thrust needle roller bearings can support high axial loads while maintaining high speeds.

Thrust needle roller bearings feature a sturdy cage that effectively holds and guides a large number of needles. They offer high rigidity while occupying minimal axial space. When used in applications where bearing surfaces in the housing or on the shaft can act as raceways, needle roller thrust bearings occupy no more space than a conventional thrust washer.

 

Advantages :

The main advantage of needle roller thrust bearings is their ability to support considerable loads or shocks. This is due to the small difference in diameter between needles in the same cage. In addition, to reduce contact pressure on raceways, the ends of the needles are slightly depressed, enabling them to better withstand high loads without harming the raceway.

 

Areas of application :

Here are just a few examples of common applications for needle roller thrust bearings:

 

  • Crankshaft bearings: Needle roller thrust bearings are used in internal combustion engines to support the axial loads resulting from reciprocating piston motion and crankshaft torque.
  • Driveshafts: In driveshafts, needle roller thrust bearings help support the axial loads resulting from rotation and power transfer.
  • Machine tools: Needle roller thrust bearings are used in machine tools to support axial loads resulting from machining operations.
  • Industrial equipment: In a variety of industrial equipment, such as pumps, compressors and gearboxes, needle roller thrust bearings are used to support axial loads generated by rotational movements and working loads.
  • Medical applications: In some medical equipment, such as fixed-dose syringes and infusion pumps, needle roller bearings can be used to support axial loads in confined spaces.
  • Aeronautical applications: In the aeronautical industry, needle roller bearings are used in flight control systems and flap mechanisms to support axial loads and guarantee precise movements.
  • Precision instruments: Needle roller bearings are also used in certain precision instruments, such as microscopes and optical equipment, to ensure precise, stable positioning.
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III. Why choose a needle roller thrust bearing?

 

Design:

Thrust needle roller bearings feature high rigidity in a minimum of axial space. They are ideally suited to environments where space is limited, such as gear assemblies. These types of bearings can be designed with or without a single raceway, and in some cases, the rolling elements can use surrounding machine parts as raceways. Thanks to their design, thrust needle roller bearings can support high axial loads while maintaining high speeds.

Thrust needle roller bearings feature a sturdy cage that effectively holds and guides a large number of needles. They offer high rigidity while occupying minimal axial space. When used in applications where bearing surfaces in the housing or on the shaft can act as raceways, needle roller thrust bearings occupy no more space than a conventional thrust washer.

Advantages :

The main advantage of needle roller thrust bearings lies in their ability to support considerable loads or shocks. This is due to the small difference in diameter between needles in the same cage. In addition, to reduce contact pressure on raceways, the ends of the needles are slightly depressed, enabling them to better withstand high loads without harming the raceway.

 

Areas of application :

Here are some examples of common applications for needle roller thrust bearings:

 

  • Crankshaft bearings: Needle roller thrust bearings are used in internal combustion engines to support the axial loads resulting from reciprocating piston motion and crankshaft torque.

 

  • Drive shafts: In drive shafts, needle roller thrust bearings help support the axial loads resulting from rotation and power transfer.

 

  • Machine tools: Needle roller thrust bearings are used in machine tools to support axial loads resulting from machining operations.

 

  • Industrial equipment: In a variety of industrial equipment, such as pumps, compressors and gearboxes, needle roller thrust bearings are used to support axial loads generated by rotational movements and working loads.

 

  • Medical applications: In some medical equipment, such as fixed-dose syringes and infusion pumps, needle roller bearings can be used to support axial loads in confined spaces.

 

  • Aerospace applications: In the aerospace industry, needle thrust bearings are used in flight control systems and flap mechanisms to support axial loads and guarantee precise movements.

 

  • Precision instruments: Needle roller bearings are also used in certain precision instruments, such as microscopes and optical equipment, to ensure precise, stable positioning.

PLEASE NOTE:

 

When using bearings for a specific application, it's important to consider sealing.

The importance of sealing lies in its ability to protect your bearings from harmful elements such as dust, moisture and contaminants. By ensuring proper sealing, you can significantly extend the life, improve the performance and increase the reliability of your bearings. This significantly reduces the risk of premature wear and bearing failure.

Understanding bearing sealing

By following these tips, you should be able to choose the belts that are best suited to your application, and that operate safely and efficiently.

 

If you have any questions or comments on this definition, please use this form. Thank you in advance!

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