The parallel shaft gear motors are also called helical or in-line gearmotors because the input shaft and output shaft are parallel to each other. They can be single, double, triple or even quadruple reduction to achieve the desired ratio and output speed. Efficiency can be as high as 99% per stage of reduction so it is always a more energy efficient gear motor than right angle worm gear motors. Because its efficiency is not lost as heat, as it is in a right angle worm gear motor, more of the motors input horsepower is transferred to the output shaft.
Parallel shaft geared motors are the modern version of coaxial geared motors. As a result of their compact and short design, they take up less space than helical geared motors. Parallel shaft geared motors can either have a solid shaft - or alternatively a hollow shaft as so-called plug-on gear unit. This means that the geared motor is optimally integrated into the driven machine.
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