well-known Whitney style technology. The rotary actuator assembly 30 includes a pivot capstan 146 that establishes the axis of rotation for the rotary actuator assembly 30. The pivot capstan 146 is
located in, and attached to, the base plate 38 at the first well 70. The rotary actuator assembly 30 further includes an arm assembly 148 that is operatively attached to the pivot capstan 146 and is substantially triangular in shape. Preferably, the
arm assembly 148 includes first and second arms 150a, 150b, for moving, respectively, first and second transducers 28a, 28b, relative to the upper and lower surfaces of the hard disk 24. The rotary actuator assembly 30 further includes a voice coil
assembly 154 that, in response to signals from the electronics 88, causes the arm assembly 148 tothrough a hole in the magnetic flux return plate 166 and serves to hold the second crash stop 170 in place. The second crash stop 170 also includes a
second frusto-conical portion 174 for absorbing the rotational energy of the rotary actuator assembly 130 when it has rotated too far in the clockwise direction.

The height of the voice coil assembly 154 determines where the second level of the baseplate 38 is located relative to the first level. Consequently, the height of the voice coil assembly 154 also determines the height of the volumes between the
upper side 84 of the printed circuit board 82 and the second level of the base plate 38 and, hence, the height of the electronic components that can be located on the upper side 84