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Is your application not operating like it should? Analyze the condition of your bearing system using our automatic, web-based bearing frequency calculator. We use bearing kinematics to help you detect issues.

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Bearing Frequency Analysis

Bearings are a combination of geometric shapes rotating relative to each other. We’ve calculated frequencies, based on mathematical models, that would show up if there was damage to the rolling elements of the bearing.

Comparing frequency ranges from our calculator to your measured reading can pinpoint noise or vibration spikes that are outside the normal range.

This bearing fault frequency calculator will support any of our GMN bearings, whether it’s an angular contact bearing or a deep groove radial ball bearing.

You’ll be able to pinpoint if the bearing damage is occurring at the:

  • Outer race
  • Inner race
  • Balls
  • Bearing cage

If no correlation is found then the issue could be unrelated to the bearings. If you are having trouble identifying bearing issues, contact our on-site engineering support for assistance.

A Bearing Frequency Analysis is an Art Form

Completing numerous system-wide bearing performance analyses has given us a lot of experience in detecting bearing issues.

A lot of the time, bearing frequencies don’t perfectly align.

Frequency spikes very close to what’s provided in this calculator could still signal a precision bearing issue. Therefore, we recommend you contact us for a system-wide bearing performance analysis.

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. Please contact our engineers for support during this time. Precision bearing failure analysis can be much smoother and faster with years of experience on your side.

Please note: The precision bearing fault frequencies come from industry accepted calculations. If there are any questions please contact GMN Bearing USA engineers for support. Also, our GMN Precision Bearing Catalog (page 92) has the formulas that we’ve outlined.

General Parameters

Calculate by Part Number

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...or by bearing attributes

Enter your application shaft RPM or Hz (ω)

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Application Bearing
Part Number
Bearing Size
Bearing Series
Hybrid (Si3N4 Balls)
Bearing Geometrical Data
Number of Balls Z [Qty]
Contact Angle α 0Ο [°]
Bearing Weight m [kg]
Frequency / Application Data
RPM n [1/min]
Frequency ω [1/sec]
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]
bearing frequency tool


Bearing Information
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 r1,2 [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 guarantee, expressed or implied, regarding the accuracy of this information or its applicability to your engineering situation. Please consult your engineer or engineering consultant before making any technical decisions.

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