The standard Phase Variator configuration has both the input and output shafts extending from the front face of the housing. When the Phase Variator is to be driven by sprockets or pulleys, it is sometimes necessary to use drive gears that are larger than the I/O shaft center distance will allow. As a result, it may be necessary to specify the Phase Variator with one of the shafts reversed. Both right-hand and left-hand shaft reverses are available from the factory.

All models have (4) mounting holes located in each corner of the housing. Using these mounting holes and the mounting bolts supplied with each unit, the Phase Variator may be either face or back mounted in any position.