Precision Bearing Frequency Analysis
Precision Bearing Frequency Fault Calculator
Super precision bearings are a combination of superbly designed geometric shapes. This is an obvious over simplification. However, because they are geometric shapes that are rotating/spinning, this helps to analyze failures. Precision bearing fault frequencies are derived from the geometric size of the bearing parts themselves – a concept referred to at times as bearing kinematics.
The below Frequency calculation tool can support failure analysis of any GMN Bearing system, Super Precision Angular Contacts or Super Precision Radial ball bearings. Utilizing the below tool can support bearing analysis to know:
- Bearings are perfectly good – issues elsewhere in the system
- Outer race way damage
- Inner race way damage
- Ball damage
- Cage damage
- Contamination – experienced analysis and interpretation
Calculate by Part Number
...or by bearing attributes
Enter your application shaft RPM or Hz (ω)
|Hybrid (Si3N4 Balls)|
|Bearing Geometrical Data|
|Number of Balls||Z [Qty}|
|Contact Angle||α 0Ο [°]|
|Bearing Weight||m [kg]|
|Frequency / Application Data|
|Ball Spin Frequency||f(w) [1/sec]|
|Cage Frequency||f(w) [1/sec]|
|Ball Pass Frequency – Inner Ring||f(IR) [1/sec]|
|Ball Pass Frequency – Outer Ring||f(AR) [1/sec)|
|Bearing Load and RPM Ratings|
|Dynamic Radial Load Rating||C [N]|
|Static Radial Load Rating - Steel Balls||C0 [N]|
|Static Radial Load Rating - Ceramic Balls||C0 HY [N]|
|Speed Value with Oil Lubrication||noil [1/min]|
|Speed Value with Grease Lubrication||ngrease [1/min]|
|Nominal Bore Diameter||d [mm]|
|Nominal Outer Diameter||D [mm]|
|Nominal Bearing Width||B [mm]|
|Pitch Circle||dm [mm]|
|Ball Diameter||Dw [mm]|
|OD Inner Ring||d1 [mm]|
|ID Outer Ring||D1 [mm]|
|ID Outer Ring (Open Side)||D2 [mm]|
|Chamfer (Open Side)||r3,4 [mm]|
DISCLAIMER: The data provided on this page is for general information purposes only. While the intention is to provide accurate information, the calculations performed by these tools/calculators are mathematical estimates only and errors may exist in the supplied information. There is NO WARRANTY OR GUARANTY, expressed or implied, regarding the accuracy of this information or its applicability to your engineering situation. Please consult your own engineering consultant before making any technical decisions.
Precision Bearing Analysis Thoughts
Failure analysis, even at solely the frequency level, can be called an art form. Much experience can be brought into a thorough precision bearing system analysis. It is good to know that more often than not the frequencies do not perfectly align. This can happen for a multitude of reasons including the accuracy of various tools involved. For this reason, frequency spikes very close to those provided in the above tool may still be from the precision bearing(s). This is where analysis experience can be priceless.
Also, be aware of frequency spikes that are at RPM or at a harmonic of the RPM the unit is running at. This could be from an imbalance, out of roundness, out of concentric housing, tool noise, etc. There are times when a frequency analysis is quick and easy; be thankful for these times! In these instances and the much more difficult instances, be quick to contact GMN USA engineers for support. Precision bearing failure analysis can be much smoother and faster with years of experience on your side.
Note that precision bearing fault frequencies are derived from industry accepted calculations. If there are any questions on the methods used, please contact GMN USA engineers for support. Formulas are also outlined in the GMN Precision Bearing Catalog on page 92.
GMN Bearing USA Ltd. and its partners make no representations or warranties of any kind regarding the tool and information contained on this page. Any use or reliance upon this tool and information shall be at the sole risk of the user and GMN Bearing USA Ltd. shall have no liability whatsoever with respect to any decisions or actions made by the user based on results obtained from this tool and information.
DISCLAIMER: The data provided on this page is for general information purposes only. While the intention is to provide accurate information, the calculations performed by these tools/calculators are mathematical estimates only and errors may exist in the supplied information. There is NO WARRANTY OR GUARANTY, expressed or implied, regarding the accuracy of this information or its applicability to your engineering situation.
Please consult your own engineering consultant before making any technical decisions.