Abstract In this research, the effect of temperature on the magnetic performance an‎d torque transmission capacity of axial neodymium magnetic couplings was experimentally investigated. The main objective of this study was to analyze the variation of magnetic torque under different thermal conditions an‎d to eva‎luate the operational stability of the coupling at elevated temperatures. For this purpose, an experimental setup was designed an‎d fabricated, consisting of two coaxial stainless-steel (316) disks, each equipped with four neodymium permanent magnets arranged in a co-polar an‎d opposing configuration. Two separate experimental procedures were performed. In the first experiment, the output disk was locked by a powder brake, an‎d the magnetic torque transmission capacity during the start-up phase was measured by gradually increasing the rotational speed of the driving disk. In the second experiment, the motor operated at a constant speed, an‎d by gradually applying voltage to the brake, the output disk was brought to a stop; in this case, the braking torque transmission capacity was determined. The results from both experiments were presented as torque–time diagrams, illustrating the system’s behavior over the temperature range of 40 °C to 140 °C. These diagrams clearly demonstrate the trend of maximum torque variation at the moment of slip under different thermal conditions. The findings revealed that, with increasing temperature, the maximum transmitted torque in both experiments decreased by approximately 65% to 90%. However, at higher temperatures, the rate of torque reduction in the braking test was greater, which was attributed to the effect of heat on bearing performance. Overall, the thermal behavior of magnetic couplings varies under different loading conditions. This behavior must be carefully considered in the design an‎d application of magnetic couplings intended for high-temperature environments to ensure reliable torque transmission an‎d long-term performance.

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