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A traditional screw essentially consists of a steel shaft with trapezoidal thread and a bronze, metal or plastic nut. With this design, approximately 70% of the power is dissipated through the heat generated by friction at the sliding contact surfaces. Unlike traditional screws, high efficiency screws from SKF are fitted with rolling elements (balls or rollers) that transmit the power between the nut and the screw shaft. The rolling motion minimizes friction between the nut and the shaft, therefore:

A traditional screw essentially consists of a steel shaft with trapezoidal thread and a bronze, metal or plastic nut. With this design, approximately 70% of the power is dissipated through the heat generated by friction at the sliding contact surfaces. Unlike traditional screws, high efficiency screws from SKF are fitted with rolling elements (balls or rollers) that transmit the power between the nut and the screw shaft. The rolling motion minimizes friction between the nut and the shaft, therefore:

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