![\"Single](\"https:\/\/www.usubearings.com\/wp-content\/uploads\/2026\/07\/tapered-roller-bearing-structure.jpg-300x158.png\" "\\"\\"")
<\/p>\nA customer recently asked us:<\/p>\n
> \u201cA 33022 bearing had been operating for just over two days when some of its rollers became tilted or skewed. What could have caused this problem?\u201d<\/p>\n
Roller skewing after such a short operating period is not a normal running condition. It usually indicates that the bearing arrangement, installation setting, lubrication condition, or surrounding components need to be inspected.<\/p>\n
In this case, incorrect axial clearance or preload is one of the most important possible causes. However, the damaged bearing and the complete installation should be examined before a final conclusion is made.<\/p>\n
Quick Answer<\/p>\n
The 33022 is a single-row tapered roller bearing. This type of bearing normally works as part of an adjusted bearing arrangement, often together with another tapered roller bearing.<\/p>\n
After installation, the bearing arrangement must be set to the specified axial clearance or preload.<\/p>\n
If the axial clearance is excessive, the rollers may not remain correctly guided under changing load conditions. This can increase sliding, vibration, heat generation, cage stress, and uneven contact.<\/p>\n
If the clearance is too small or the preload is excessive, friction and operating temperature can also increase significantly.<\/p>\n
<\/p>\n
Roller skewing after only two days may therefore be related to:<\/p>\n
* Incorrect axial clearance<\/p>\n
* Incorrect preload<\/p>\n
* Improper bearing adjustment<\/p>\n
* Loose locking components<\/p>\n
* Incorrect installation<\/p>\n
* Cage damage<\/p>\n
* Insufficient minimum load<\/p>\n
* Poor lubrication<\/p>\n
* Shaft or housing dimensional errors<\/p>\n
* Misalignment or abnormal external loading<\/p>\n
The bearing should no longer be used if the rollers or cage are visibly displaced or damaged.<\/p>\n
What Type of Bearing Is the 33022?<\/p>\n
The 33022 is a single-row tapered roller bearing.<\/p>\n
Its main components normally include:<\/p>\n
* A solid inner ring with a tapered raceway<\/p>\n
* A solid outer ring with a tapered raceway<\/p>\n
* Tapered rollers<\/p>\n
* A cage that separates and guides the rollers<\/p>\n
Unlike a deep groove ball bearing, the 33022 contains tapered rollers rather than balls.<\/p>\n
The tapered geometry allows the bearing to support high radial loads together with axial load in one direction.<\/p>\n
Its axial load-carrying capability is related to the bearing contact angle. In general, a larger contact angle provides a higher axial load-carrying capability.<\/p>\n
However, because a single-row tapered roller bearing supports axial load mainly in one direction, it is normally used with another bearing that locates the shaft in the opposite direction.<\/p>\n
Why Must Single-Row Tapered Roller Bearings Be Adjusted?<\/p>\n
A single-row tapered roller bearing is commonly installed:<\/p>\n
<\/p>\n
* Opposite another single-row tapered roller bearing<\/p>\n
* In an X arrangement<\/p>\n
* In an O arrangement<\/p>\n
* As part of a matched bearing set<\/p>\n
* With an adjusting nut, calibrated shims, or spacers<\/p>\n
During installation, the two opposing bearings must be adjusted to achieve the required axial clearance or preload.<\/p>\n
The correct setting depends on factors such as:<\/p>\n
* Bearing arrangement<\/p>\n
* Shaft and housing design<\/p>\n
* Operating load<\/p>\n
* Rotational speed<\/p>\n
* Working temperature<\/p>\n
* Required shaft rigidity<\/p>\n
* Lubrication method<\/p>\n
* Equipment manufacturer\u2019s instructions<\/p>\n
Correct bearing adjustment helps maintain proper roller contact and shaft guidance.<\/p>\n
An unsuitable setting can cause abnormal heat, vibration, sliding, noise, unstable shaft movement, or premature bearing damage.<\/p>\n
What Happens If the Axial Clearance Is Too Large?<\/p>\n
Excessive axial clearance allows too much axial movement within the bearing arrangement.<\/p>\n
Under unstable, reversing, or changing loads, the rollers may not remain evenly loaded and correctly guided.<\/p>\n
Possible consequences include:<\/p>\n
Increased Roller Sliding<\/p>\n
Rolling elements should primarily roll along the raceways.<\/p>\n
If the bearing arrangement has excessive looseness or insufficient stabilizing load, the rollers may experience increased sliding instead of maintaining the intended rolling motion.<\/p>\n
Sliding increases friction and can damage the roller and raceway surfaces.<\/p>\n
Unstable Roller Guidance<\/p>\n
Tapered rollers rely on the raceways, guide rib, cage, load, and correct bearing setting to maintain their intended position.<\/p>\n
If the bearing arrangement is too loose, roller motion can become unstable.<\/p>\n
This can lead to skewing, uneven contact, vibration, and cage stress.<\/p>\n
Higher Cage Load<\/p>\n
The cage is designed to separate and guide the rollers. It is not intended to correct severe roller instability caused by an improperly adjusted bearing arrangement.<\/p>\n
Repeated roller impact or sliding can accelerate cage pocket wear.<\/p>\n
In serious cases, the cage may deform, crack, or fracture.<\/p>\n
Increased Heat and Noise<\/p>\n
Excessive sliding and unstable contact can generate:<\/p>\n
* Higher operating temperature<\/p>\n
* Abnormal noise<\/p>\n
* Vibration<\/p>\n
* Wear particles<\/p>\n
* Surface damage<\/p>\n
These symptoms may appear before the rollers become visibly displaced.<\/p>\n
Can Excessive Preload Also Damage the Bearing?<\/p>\n
Yes.<\/p>\n
It is incorrect to assume that only excessive clearance causes tapered roller bearing damage.<\/p>\n
If the bearing is adjusted too tightly, the preload may become excessive.<\/p>\n
Possible consequences include:<\/p>\n
* Increased internal friction<\/p>\n
* Rapid temperature rise<\/p>\n
* Lubricant deterioration<\/p>\n
* Raceway and roller surface damage<\/p>\n
* Cage damage<\/p>\n
* Reduced bearing life<\/p>\n
* Bearing seizure in severe cases<\/p>\n
The target is not simply to eliminate all clearance.<\/p>\n
The bearing arrangement must be adjusted to the value specified for the actual equipment and operating condition.<\/p>\n
Why Did the Rollers Become Skewed?<\/p>\n
Visible roller skewing usually means that the roller-and-cage assembly is no longer operating normally.<\/p>\n
The most likely areas to investigate are listed below.<\/p>\n
1. Incorrect Axial Clearance<\/p>\n
If the bearing arrangement was not correctly adjusted after installation, excessive axial clearance may have allowed unstable roller motion.<\/p>\n
This is one of the main possible causes in this case.<\/p>\n
2. Incorrect Preload<\/p>\n
If the adjustment was too tight, excessive preload may have generated high friction and temperature.<\/p>\n
Thermal expansion during operation can further change the effective bearing setting.<\/p>\n
3. Loose Adjusting or Locking Components<\/p>\n
A correctly adjusted bearing may lose its setting if:<\/p>\n
* The locknut becomes loose<\/p>\n
* A locking washer is not secured<\/p>\n
* A retaining component moves<\/p>\n
* A spacer is incorrect<\/p>\n
* A housing cover becomes loose<\/p>\n
The initial installation value should therefore be checked again after disassembly.<\/p>\n
4. Rollers Were Not Correctly Seated During Installation<\/p>\n
During tapered roller bearing adjustment, the shaft or bearing arrangement is commonly rotated so that the rollers settle into their correct operating positions.<\/p>\n
If the rollers are not properly seated before the final adjustment, the measured axial clearance may be inaccurate.<\/p>\n
The bearing setting can then change after the machine begins operating.<\/p>\n
5. Cage Damage<\/p>\n
The cage may have been:<\/p>\n
* Damaged during transport<\/p>\n
* Deformed during installation<\/p>\n
* Scratched by incorrect tools<\/p>\n
* Overloaded by unstable rollers<\/p>\n
* Worn by inadequate lubrication<\/p>\n
Once the cage pockets become damaged, the rollers may no longer remain evenly spaced or correctly guided.<\/p>\n
6. Insufficient or Incorrect Lubrication<\/p>\n
Lubrication helps reduce friction and sliding between contact surfaces.<\/p>\n
Too little lubricant, an unsuitable lubricant, contaminated lubricant, or an incorrect lubrication method can increase:<\/p>\n
* Sliding<\/p>\n
* Friction<\/p>\n
* Temperature<\/p>\n
* Surface wear<\/p>\n
* Cage stress<\/p>\n
The lubricant type, quantity, cleanliness, and distribution should all be checked.<\/p>\n
7. Shaft or Housing Dimensional Errors<\/p>\n
Incorrect shaft or housing dimensions can affect:<\/p>\n
* Bearing fit<\/p>\n
* Ring deformation<\/p>\n
* Alignment<\/p>\n
* Axial setting<\/p>\n
* Operating clearance<\/p>\n
* Load distribution<\/p>\n
The shaft seat, housing bore, shoulder squareness, surface condition, and dimensional tolerances should be measured.<\/p>\n
### 8. Shaft Misalignment<\/p>\n
Misalignment can cause uneven load distribution across the rollers.<\/p>\n
Possible sources include:<\/p>\n
* Shaft bending<\/p>\n
* Housing misalignment<\/p>\n
* Incorrect shoulder geometry<\/p>\n
* Coupling misalignment<\/p>\n
* Installation at an angle<\/p>\n
* Deformation of the mounting structure<\/p>\n
A tapered roller bearing has limited ability to tolerate alignment error.<\/p>\n
9. Abnormal or Insufficient Load<\/p>\n
Both abnormal overload and insufficient stabilizing load may affect roller motion.<\/p>\n
The investigation should confirm:<\/p>\n
* Actual radial load<\/p>\n
* Actual axial load<\/p>\n
* Load direction<\/p>\n
* Shock loading<\/p>\n
* Load fluctuation<\/p>\n
* Machine vibration<\/p>\n
* Rotational speed<\/p>\n
The bearing selection should then be checked against the real operating conditions.<\/p>\n
## How Is the Clearance of a Tapered Roller Bearing Measured?<\/p>\n
For an adjusted tapered roller bearing arrangement, axial displacement is generally the key installation measurement.<\/p>\n
The axial clearance is influenced by the position of the opposing bearing.<\/p>\n
Depending on the machine design, adjustment may be completed using:<\/p>\n
* A locknut<\/p>\n
* Threaded adjusting rings<\/p>\n
* Calibrated shims<\/p>\n
* Housing covers<\/p>\n
* Ground spacers<\/p>\n
* A matched bearing set<\/p>\n
A dial indicator may be used to measure the axial movement of the shaft or bearing arrangement.<\/p>\n
The shaft should normally be rotated during the adjustment procedure so that the rollers settle against the raceways and guide ribs.<\/p>\n
The final adjustment value should follow:<\/p>\n
* The equipment manufacturer\u2019s instructions<\/p>\n
* The bearing arrangement drawing<\/p>\n
* The specified endplay or preload<\/p>\n
* The approved installation procedure<\/p>\n
There is no single axial-clearance value that is correct for every 33022 application.<\/p>\n
How Is the Clearance Set in a Matched Bearing Pair?<\/p>\n
In some paired tapered roller bearing arrangements, the internal axial clearance or preload is determined by precision-ground spacers.<\/p>\n
The spacer dimensions are selected or ground according to the required bearing setting.<\/p>\n
This means that spacers should not be:<\/p>\n
* Mixed between bearing sets<\/p>\n
* Replaced with unverified parts<\/p>\n
* Ground without calculation<\/p>\n
* Installed in the wrong position<\/p>\n
* Reused without dimensional inspection<\/p>\n
<\/p>\n
Changing the spacer width changes the final axial clearance or preload of the bearing arrangement.<\/p>\n
<\/p>\n
Matched bearings and their spacers should therefore be kept together as a complete set.<\/p>\n
What Should Be Inspected After This Failure?<\/p>\n
Because some rollers have already become visibly skewed, the bearing should be removed from service and inspected.<\/p>\n
Inspect the Bearing<\/p>\n
Check for:<\/p>\n
* Skewed or displaced rollers<\/p>\n
* Worn cage pockets<\/p>\n
* Cracked or deformed cage sections<\/p>\n
* Raceway scoring<\/p>\n
* Roller surface damage<\/p>\n
* Discoloration caused by heat<\/p>\n
* Metal particles<\/p>\n
* Rib wear<\/p>\n
* Uneven contact patterns<\/p>\n
Inspect the Installation<\/p>\n
Confirm:<\/p>\n
* Bearing mounting direction<\/p>\n
* Arrangement of the two bearings<\/p>\n
* Initial axial clearance<\/p>\n
* Preload setting<\/p>\n
* Locknut condition<\/p>\n
* Locking-device condition<\/p>\n
* Spacer dimensions<\/p>\n
* Shim thickness<\/p>\n
* Housing-cover position<\/p>\n
Inspect the Shaft and Housing<\/p>\n
Measure and check:<\/p>\n
* Shaft diameter<\/p>\n
* Housing bore<\/p>\n
* Shoulder squareness<\/p>\n
* Shaft straightness<\/p>\n
* Housing alignment<\/p>\n
* Seat roundness<\/p>\n
* Surface damage<\/p>\n
* Loose-fit marks<\/p>\n
* Contact corrosion<\/p>\n
Inspect the Lubrication<\/p>\n
Record:<\/p>\n
* Lubricant type<\/p>\n
* Lubricant viscosity<\/p>\n
* Grease or oil quantity<\/p>\n
* Lubrication method<\/p>\n
* Contamination<\/p>\n
* Lubricant discoloration<\/p>\n
* Operating temperature<\/p>\n
* Lubrication interval<\/p>\n
Review the Operating Conditions<\/p>\n
Collect:<\/p>\n
* Rotational speed<\/p>\n
* Radial load<\/p>\n
* Axial load<\/p>\n
* Load direction<\/p>\n
* Machine temperature<\/p>\n
* Operating hours<\/p>\n
* Vibration<\/p>\n
* Shock load<\/p>\n
* Startup frequency<\/p>\n
These details are necessary for a reliable failure analysis.<\/p>\n
Can the Damaged 33022 Bearing Be Reused?<\/p>\n
A bearing with visibly skewed rollers should not be placed back into service without professional inspection.<\/p>\n
If the cage, rollers, raceways, or guide ribs have been damaged, the bearing should normally be replaced.<\/p>\n
Simply repositioning the rollers is not a reliable repair.<\/p>\n
Even if the bearing appears to rotate again, hidden damage may remain on:<\/p>\n
* Roller surfaces<\/p>\n
* Raceway surfaces<\/p>\n
* Cage pockets<\/p>\n
* Guide ribs<\/p>\n
Continuing to operate a damaged bearing can lead to sudden failure and secondary damage to the shaft, housing, gears, or other machine components.<\/p>\n
Recommended Corrective Actions<\/p>\n
For this case, the recommended procedure is:<\/p>\n
Do not replace only the visibly damaged bearing without checking the bearing on the opposite side.<\/p>\n
The two bearings work together to establish the shaft\u2019s axial position and operating setting.<\/p>\n
Frequently Asked Questions<\/p>\n
Does the 33022 bearing contain balls or rollers?<\/p>\n
The 33022 is a tapered roller bearing. It contains tapered rollers, not balls.<\/p>\n
Can a single 33022 bearing be used by itself?<\/p>\n
A single-row tapered roller bearing normally supports axial load mainly in one direction. It is commonly used with another bearing that supports axial load in the opposite direction.<\/p>\n
The final arrangement depends on the equipment design.<\/p>\n
What is the most likely cause of roller skewing after two days?<\/p>\n
Incorrect axial clearance or preload is an important possible cause, particularly if the bearing arrangement was not adjusted after installation.<\/p>\n
However, cage damage, poor lubrication, loose locking parts, incorrect fits, misalignment, and abnormal loading should also be investigated.<\/p>\n
Does excessive axial clearance damage tapered roller bearings?<\/p>\n
Excessive axial clearance can reduce shaft guidance and may contribute to unstable roller movement, sliding, vibration, cage wear, noise, and heat under unsuitable operating conditions.<\/p>\n
Can excessive preload cause bearing failure?<\/p>\n
Yes. Excessive preload increases friction and operating temperature and can lead to lubricant deterioration, surface damage, and premature bearing failure.<\/p>\n
How should tapered roller bearing clearance be measured?<\/p>\n
The adjusted bearing arrangement is generally checked by measuring axial shaft movement using an appropriate measuring method, such as a dial indicator.<\/p>\n
The exact procedure and target value should follow the equipment manufacturer\u2019s specification.<\/p>\n
Can the spacer determine the axial clearance?<\/p>\n
Yes. In matched bearing arrangements, precision-ground spacers may establish the required axial clearance or preload.<\/p>\n
The spacer must match the original bearing arrangement and installation requirements.<\/p>\n
Can skewed rollers simply be repositioned?<\/p>\n
No. Visible roller skewing may indicate cage or contact-surface damage.<\/p>\n
The bearing must be disassembled and inspected, and it should be replaced if damage is found.<\/p>\n
Conclusion<\/p>\n
The 33022 is a single-row tapered roller bearing that normally works as part of an adjusted bearing arrangement.<\/p>\n
If some rollers become skewed after only two days, the bearing has already entered an abnormal operating condition.<\/p>\n
Incorrect axial clearance or preload is a major area to investigate, but it should not be treated as the only possible cause.<\/p>\n
A complete inspection should include:<\/p>\n
* Bearing adjustment<\/p>\n
* Opposing bearing condition<\/p>\n
* Locking components<\/p>\n
* Cage condition<\/p>\n
* Lubrication<\/p>\n
* Shaft and housing dimensions<\/p>\n
* Alignment<\/p>\n
* Speed and load<\/p>\n
The damaged bearing should be removed from service. Before installing a replacement, the root cause must be identified and corrected to prevent the same problem from happening again.<\/p>\n
Need Help Analyzing a Tapered Roller Bearing Failure?<\/p>\n
When requesting technical support, please provide:<\/p>\n
* Complete bearing designation<\/p>\n
* Equipment type<\/p>\n
* Installation arrangement<\/p>\n
* Rotational speed<\/p>\n
* Radial and axial loads<\/p>\n
* Lubrication method<\/p>\n
* Operating temperature<\/p>\n
* Axial-clearance or preload setting<\/p>\n
* Photos of the bearing, cage, rollers, shaft, and housing<\/p>\n
USU Bearing can assist with bearing selection, application analysis, OEM bearing solutions, and preliminary failure analysis.<\/p>","protected":false},"excerpt":{"rendered":"
Why did the rollers in a 33022 roller bearing become skewed after only two days? Learn the likely causes, inspection steps, and correct bearing adjustment methods.<\/p>","protected":false},"author":1,"featured_media":415838,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-415833","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"_links":{"self":[{"href":"https:\/\/www.usubearings.com\/chinese\/wp-json\/wp\/v2\/posts\/415833","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.usubearings.com\/chinese\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.usubearings.com\/chinese\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.usubearings.com\/chinese\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.usubearings.com\/chinese\/wp-json\/wp\/v2\/comments?post=415833"}],"version-history":[{"count":3,"href":"https:\/\/www.usubearings.com\/chinese\/wp-json\/wp\/v2\/posts\/415833\/revisions"}],"predecessor-version":[{"id":415839,"href":"https:\/\/www.usubearings.com\/chinese\/wp-json\/wp\/v2\/posts\/415833\/revisions\/415839"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.usubearings.com\/chinese\/wp-json\/wp\/v2\/media\/415838"}],"wp:attachment":[{"href":"https:\/\/www.usubearings.com\/chinese\/wp-json\/wp\/v2\/media?parent=415833"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.usubearings.com\/chinese\/wp-json\/wp\/v2\/categories?post=415833"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.usubearings.com\/chinese\/wp-json\/wp\/v2\/tags?post=415833"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}