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What Does A Thrust Bearing Do?

For years, gearbox and engine manufacturers have had trouble determining the cause of crankshaft thrust – a bearing failure. For years, gearboxes and engine manufacturers have struggled with the causes of crankshaft bearing failures. In those years and at that time, the gearbox or engine manufacturer had to struggle with the task of determining the cause of a crankshaft thrust failure and the consequences of this failure for the engine. 

The cause of a collision – bearing failure – can be attributed to a single problem or a combination of problems, but not both at the same time. 

When you start diagnosing thrust – bearing defects or if you suspect improper engine assembly, think of gearboxes – problems can arise that can cause inappropriate forward loading of the crankshaft. For example, if you change the front pulley for any reason or loosen a front eccentric shaft bolt, you must be as far away from the engine as possible. 


If the cause is the transmission – i.e. thrust – the bearing acts as a fuse and fails or even fails completely. If you midsize a thrust bearing, Babbitts can occur, which even melt the hydrodynamics of the thrust bearing. 

The facts of this situation show the importance of the thrust bearing in the gearbox and its role in transmission failure. One of these is the clutch release bearing, sometimes also called clutch release bearing. Axial bearings are usually located at the top of a motor and can consist of two or more bearings depending on the engine design. They are usually located near the engine, but they can also be placed in other places, such as under the steering wheel, in front of or behind the transmission. 

The ball is used to separate the ring, which is called a disc due to its shape and design. While radial bearings are located in the ball roller race between the opposite inner and outer bearing rings, most thrust bearings are milled into the end face of the counter ring. 

In terms of exterior design, this type of thrust bearing resembles a ball, but there are two main types of ball bearings: thrust bearings and ball bearings. Both types are used in a wide range of applications, such as airbags, air compressors, and aircraft engines. Axial bearings are integrated into a specific main bearing unit and designed for greater loads in the form of a disc that looks radially similar but with larger dimensions. 

Ball bearings are produced with grooves or rails that make the movement of the bearing smooth and allow for higher axial load capacity. A liquid thrust bearing contains a sector-shaped pad, which is arranged in a circle around the shaft and is free of swivels. There are two types of impact bearings: those that act on one side and those that act on both sides. These bearings with flooded or directed lubrication are intended for machines where API requirements require balanced thrust bearings or where a bearing may be required for other reasons. 

As with radial or low-lying ball bearings, the load is distributed among the rolling elements of the axial bearing. This maximizes the contact area of the bearing, which helps to ensure its load-bearing capacity. Crankshaft bearings provide the most direct contact between the shaft and the ball bearing, but radial loads cannot be neglected here either. The thrust bearing is aligned to the crank axial surface, so the use of a radial bearing with deep grooves or rails on both sides is mandatory. 

While this is crucial for double-sided pumps where the thrust bearing is at the other end of the shaft connection, it is also a good idea to ensure durability when using this bearing. Although it is common practice to use a fixed coupling with a rotor, only one thrust bearing is required for a single end pump. 

When dimensioning a drawer bearing for a new application, the first step is to determine the amount of thrust and upward thrust that the bearing (s) must handle. Instead of simply installing the main bearing and thrust bearing and tightening the main cap connections to the factory specified torque values, spend a few extra minutes to maximize the life of the thrust bearing. Mahle and Clevite propose minor modifications to the rear push bears to increase their wear. PUD believes that the new thrust bearing adjustment process is more efficient than the old torque adjustment process, which will result in less wear on the vertical engine mount itself. 

The thrust bearing must be able to absorb the forward thrust load emitted by the torque converter and the clutch of the gearbox. The higher engine power and torque mean that the thrust carriers have to perform much more than they were originally intended to do. 

When the scale or labyrinth is worn, the case must be opened to repair it, while the drawer bearing replacement is useless when it is worn out. When larger bearings are not an option, some manufacturers offer hydrostatic lifting systems that can be mounted on thrust bearings to enable the bearing to operate under heavy loads at low speeds. 

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