Rotary mechanism with adjustable tone wheel

A rotary mechanism, comprising:

• a fastener,
• a tone wheel comprising a first radial flange, a second radial flange, a first target, and a second target, the first and second targets mounted respectively to the first and second radial flanges to be sensed by a sensor, each of the first radial flange and the second radial flange comprising a plurality of mounting points, the plurality of mounting points of the first radial flange and the second radial flange provided for adjustment of a diameter of the tone wheel, the fastener positioned at a selected mounting point among the plurality of mounting points of the first radial flange and at a selected mounting point among the plurality of mounting points of the second radial flange to mount the first radial flange and the second radial flange to a shaft at the selected mounting points to set the diameter of the tone wheel, and
• a flange retainer attached to the first radial flange and the second radial flange,
• wherein the second radial flange comprises one or more apertures providing the plurality of mounting points of the second radial flange, the one or more apertures of the second radial flange comprises a radial slot, and the flange retainer is attached to the radial slot,
• wherein the radial slot is a second radial slot, the first radial flange comprises one or more apertures providing the plurality of mounting points of the first radial flange, and the one or more apertures of the first radial flange comprises a first radial slot, and the flange retainer is attached to the first radial slot,
• wherein the flange retainer comprises a first tab attached to the first radial slot, a second tab attached to the second radial slot, and an elongated body interconnecting the first tab and the second tab and through which the fastener extends.