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Updated by David Manney on Jul 08, 2013
 REPORT
David Manney David Manney
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17 more signs that your industrial rotating equipment is sick

A follow up to a previous list, here are 17 more symptoms that your industrial motor may be failing.

17

Eccentric rotor

Eccentric rotor
16

Resonance excitation

Resonance excitation
15

Rotor rub

Rotor rub
14

Rolling element (Ball and Roller) bearing failures

Rolling element (Ball and Roller) bearing failures
13

Blade pass and vane pass vibrations

Blade pass and vane pass vibrations
12

Flow turbulence

Flow turbulence
11

Gear issues (including tooth wear, gear eccentricity & backlash, gear misalignment, cracked teeth, hunting tooth prob...

10

Stator eccentricity, shorted laminations and loose motor iron

Stator eccentricity, shorted laminations and loose motor iron
9

Variable air gap

Variable air gap
8

Bad SCRs and loose connections on DC motor controllers

Bad SCRs and loose connections on DC motor controllers
7

Loose or blown fuses for DC motors

Loose or blown fuses for DC motors
6

Shorted control cards for DC motors

Shorted control cards for DC motors
5

Belt/sheave misalignment

Belt/sheave misalignment
4

Eccentric belt sheaves

Eccentric belt sheaves
3

Belt resonance

Belt resonance
2

Beat vibrations (between 2 closely spaced frequencies going in & out of synch with one another)

Beat vibrations (between 2 closely spaced frequencies going in & out of synch with one another)
1

Electrical current passage through motor bearings (fluting)

Electrical current passage through motor bearings (fluting)