Construction:

The Phase Variator housing is made from cast aluminum. The input and output shafts are fabricated from steel and have a black oxide finish. The input/output shafts and all internal sprockets are supported by needle bearings with separate oil seals. The combination of the above features provides for a long, trouble-free life.

Control knob:

The control knob has an internal thread and engages a centrally located thread shaft which is pinned to the sliding yoke assembly. Rotation of the knob thereby raises and lowers the yoke.
The control knob ratio is 36:1. That is, one full turn of the control knob produces a 10° change in the rotational location of the output shaft relative to the input shaft. See principle of operation for position adjustment directions.

Chain Adjustment:

If chain wear becomes excessive, the chain may be tensioned without disassembling the unit. The control knob must be rotated until the sliding yoke assembly is at the bottom of its travel. Next, remove the two allen head screws located on the bottom of the housing, exposing the adjusting screws in the base of the yoke assembly. The equal tightening of these screws increases chain tension. After adjustment, the shafts should turn freely with no appreciable backlash.

Lubrication:

All Phase Variators are shipped from the factory with a multiple purpose grease lubricant. Although all working parts are well protected, repacking of the bearings may be required in severe operating environments.