Tech-Roll Inc., a Washington State-based stainless steel pulley company, manufactures a line of hydraulic motorized pulleys, or drum motors, stainless steel pulley as they are also known. The concept of motorized pulleys has been utilized for some time, but mainly for electrical applications. stainless steel pulley Tech-Roll's president, Ulf Hansson, had the idea of a hydraulic motorized pulley while working with the North Pacific fishing industry, which has many large factory trawlers stainless steel pulley with a multitude of hydraulically driven conveyors.

The traditional way of driving stainless steel pulley these conveyors is by mounting hydraulic motors on a direct extension of the roller shaft with a flexible coupling in between.

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