An automatic gap adjustor is provided. The automatic gap adjustor includes an upper cammed disk, a lower cammed disk spaced apart from the upper cammed disk, and a resilient spring element therebetween. The upper cammed disk includes a first plurality of cams on an upper axial surface and a second plurality of cams on a lower axial surface. The lower cammed disk includes a third plurality of cams on an upper axial surface and a fourth plurality of cams on an undercut portion spaced apart from the upper axial surface. Opposing cams can be radially offset from each other, such that reciprocating axial movement of the upper disk relative to the lower disk can achieve a stepped rotation of the upper disk. Rotation of the upper disk can drive the automatic gap adjustor along a threaded support to eliminate a gap along a portion thereof.