03/05/2023
Rexnord CENTA flexible couplings – Maintenance Solutions
03/05/2023
Rexnord CENTA flexible couplings – Maintenance Solutions
The international Rexnord CENTA Group has been engaged in solving complex drive train and torsional vibration challenges since 1970. Due to their numerous innovations, the company ranks among the world’s leading manufacturers of flexible couplings and drive shafts for industry and marine applications as well as for power generation.
Benefits of regular inspection
In order to avoid unplanned downtime and to ensure uninterrupted operation, it is highly recommended to arrange a regular inspection of the rubber elements.
Size, geometry and material characteristics are relevant for the transmission of torque. Due to different operating conditions and the resulting stress, signs of use will inevitably show on the elements during operation.
In this respect, our Principals Messrs. Rexnord CENTA suggest following inspection process of the rubber elements:
Surface assessment
The rubber surfaces harden and become porous due to external factors (e.g. heat or ozone). This may result in fine diamond shaped cracks and a change of Shore hardness.
These signs of wear do not represent any impairment of the transmission capacity. Nevertheless visual inspections are recommended:
Preventive treatment of cracks
Pronounced signs of wear, such as deep cracks, impair torque transmission by reduction of the cross section.
Diamond-shaped cracks and cross cracks on the surface of the element are no problem, yet they have to be checked in intervals. Direct exposure to ozone or heat should be avoided by all means.
Therefore it is recommended to round off cracks using a highspeed milling cutter or belt sander (coarse, mediumor fine grain). After rounding off a protective surface coating must be applied.
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