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Table of content

1. Correct Way to Install Thrust Ball Bearing Steps

2. Thrust Ball Bearing Installation Guidelines

3. Common Errors During Thrust Ball Bearing Installation

4. Cautions When Installing the Thrust Ball Bearings

5. Conclusion

Thrust Ball Bearing Installation

Thrust ball bearing is a type of rolling bearing designed to handle axial loads, allowing the shaft to rotate or move in one direction while preventing motion in the opposite direction. It consists of three main components: the shaft washer, the housing washer, and the ball-and-cage assembly.

1. Correct Way to Install Thrust Ball Bearing Steps

The usual steps for installing a thrust ball bearing are as follows: First, install the housing washer, then place the cage with steel ball assembly on top, and finally add the shaft washer. The shaft washer secures the shaft's axis and allows it to rotate. Detailed steps with Below are the detailed steps with illustrated demonstrations.

Step 2

Place the housing washer/shaft washer near the fixed component (in practical applications, this part is positioned close to the fixed location), as shown in the picture right.

Step 3

Install the cage with steel ball assembly above the housing washer (or shaft washer).

Step 4

Add the shaft washer (or housing washer), as shown in the picture right.

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The fitting of thrust ball bearings with the axis is generally transitional, and the fitting of the ring with the bearing bore is a clearance fit. Therefore, this type of bearing is easier to install.

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2. Thrust Ball Bearing Installation Guidelines

In general, the axis rotates. Therefore, the fit between the inner ring and the shaft is a interference fit, while the fit between the outer ring and the bearing seat is a clearance fit.

3. Common Errors During Thrust Ball Bearing Installation

Thrust ball bearings primarily bear axial loads during operation. Despite the relatively simple installation process, errors can occur during actual repairs. The most common error is incorrectly installing the housing washer and the shaft washer, which renders the bearing useless and accelerates wear-out of the bearing journal.

Learn more: Axial Bearings: Principles of Operation, Applications, and Selection 

4. Cautions When Installing the Thrust Ball Bearings

In an incorrect example, if the inner diameter of the shaft washer is in a transition fit with the shaft journal, rotation of the shaft can cause the shaft washer to move, resulting in friction on the stationary end face. When subjected to axial force (Fx), the friction torque may exceed the resistance torque of the inner diameter fit, forcing the shaft washer to rotate and exacerbating wear on the shaft journal.

5. Conclusion

You have now completed the entire guide on thrust ball bearing installation. If you still have any questions regarding the installation process, please feel free to contact us. The ISK BEARINGS consulting team will be happy to assist you in resolving any issues.

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I have a thrust bearing sitting on my bench. To order a new one would take 30 plus weeks, which I can ill afford.

I have decided to approach a few machine shops to quote repair or replacement of the races. But before I do, I want to understand the difference between the Ball Diameters and the Radius they ride in.

The Thrust Bearing is from a Vertical Turret Lathe. The generic size of the bearing is 28" OD x 24" ID x 2 1/2" high.

The Balls in this bearing are 1." Diameter. The radius that the balls ride in is .".

What is the rational for having such a big disparity between the radius of the ball and the radius of the ball groove.

Darrell
If the ball race radius exactly matched the radius of the ball, they would scuff each other to death.

If the ball race were perfectly flat (and a cage were present to force the balls to roll in a circle), they would Brinell each other to death.

The race radius slightly larger than the ball radius allows them to have theoretical point contact, while deforming elastically under the applied load to keep the Hertzian stress reasonable.

Or, something like that. Actual bearing experts are invited to elucidate.

Oh. I agree with Russell. Someone, somewhere, has one on a shelf. Not even an accountant would throw something like that away.

... and very few machine shops could do a proper job of R&Ring something like that.





Mike Halloran
Pembroke Pines, FL, USA