Gearmotors and Reducers
No.2 Abnormal heating
No.2 Abnormal heating
Reducer (without motor) [Cause and countermeasure]
Abnormal heating
Defect of the gear head (2.1)
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| Classification No. | Cause | Countermeasure | Inspection procedure and action | Judging criterion |
|---|---|---|---|---|
| 2.1.1 | Breakage or wear of the gear | Repair by NISSEI CORPORATION | No abnormal noise occurs and the output shaft rotates smoothly | Contact NISSEI CORPORATION for the reverse rotation torque and check whether it is within the allowable range No abnormal vibration nor noise occurs |
| 2.1.2 | Breakage of the bearing or shaft | Repair by NISSEI CORPORATION | No abnormal noise occurs and the output shaft rotates smoothly | Contact NISSEI CORPORATION for the reverse rotation torque and check whether it is within the allowable range No abnormal vibration nor noise occurs |
Defect of the installation or couplings (2.2)
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| Classification No. | Cause | Countermeasure | Inspection procedure and action | Judging criterion |
|---|---|---|---|---|
| 2.2.1 | Inconsistency of the centers of the shafts | Align the centers of the shafts with each other | Check the misalignment amount | Report the misalignment amount to the coupling manufacturer and check whether it is within the allowable range |
| 2.2.2 | The ambient temperature is high | Improve the ventilation | Check the ventilation. Consult the manufacturer | Contact NISSEI CORPORATION for the surface temperature and check whether it is within the allowable range |
Defect of a load part or operating conditions (2.3)
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| Classification No. | Cause | Countermeasure | Inspection procedure and action | Judging criterion |
|---|---|---|---|---|
| 2.3.1 | Selection error for the load | Re-selection and replacement | Check that the current value of the driving force is within the rated current value | It is equivalent to or below the rated current value written on the nameplate of the driving part |
| 2.3.2 | Overload | Remove the load | Check that the current value of the driving force is within the rated current value | It is equivalent to or below the rated current value written on the nameplate of the driving part |
| 2.3.3 | Excessive overhung load | Remove the load | Check that it is equivalent to or less than the allowable O.H.L. value | It is equivalent to or less than the allowable O.H.L. value written on the catalog |
| 2.3.4 | Too much tension of the belt and chain | Loosen them | Check that the tension is equivalent to or less than the value recommended by the manufacturers | Report the slack amount to the belt and chain manufacturers and check whether it is within the allowable range |