Nissei Corporation


No.1 The gear does not rotate, The speed does not increase

Reducer (without motor) [Cause and countermeasure]

The gear does not rotate, The speed does not increase

Defect of the gear head (1.1)

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Classification No.CauseCountermeasureInspection procedure and actionJudging criterion
1.1.1Breakage or wear of the gearRepair by NisseiNo abnormal noise occurs and the output shaft rotates smoothlyContact Nissei for the reverse rotation torque and check whether it is within the allowable range
No abnormal vibration nor noise occurs
1.1.2Breakage of the bearing or shaftRepair by NisseiNo abnormal noise occurs and the output shaft rotates smoothlyContact Nissei for the reverse rotation torque and check whether it is within the allowable range
No abnormal vibration nor noise occurs

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Defect of the installation or couplings (1.2)

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Classification No.CauseCountermeasureInspection procedure and actionJudging criterion
1.2.1Breakage of the case installation partReplacementCheck whether the case is broken or crackedThe case is not broken or cracked
1.2.2Inconsistency of the centers of the shaftsAlign the centers of the shafts with each otherCheck the misalignment amountReport the misalignment amount to the coupling manufacturer and check whether it is within the allowable range
1.2.3The couplings spin freeFix the couplings with the shaftCheck whether the key or mounting screws are installed securelyThere is no relative sliding of the shaft connected with the output shaft by the couplings

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Defect of a load part or operating conditions (1.3)

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Classification No.CauseCountermeasureInspection procedure and actionJudging criterion
1.3.1Selection error for the loadRe-selection and replacementCheck that the current value of the driving force is within the rated current valueIt is equivalent to or below the rated current value written on the nameplate of the driving part
1.3.2OverloadRemove the loadCheck that the current value of the driving force is within the rated current valueIt is equivalent to or below the rated current value written on the nameplate of the driving part
1.3.3Excessive overhung loadRemove the loadCheck that it is equivalent to or less than the allowable O.H.L. valueIt is equivalent to or less than the allowable O.H.L. value written on the catalog
1.3.4Contact Positioning ControlRemoval of interferenceCheck that there is no interventionThere is no intervention
1.3.5Too much tension of the belt and chainLoosen themCheck that the tension is equivalent to or less than the value recommended by the manufacturersReport the slack amount to the belt and chain manufacturers and check whether it is within the allowable range

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