A disk drive having a translatable ramp is disclosed. The disk drive
includes a head gimbal assembly having a proximate end that is attached
to an actuator, and a distal end that includes a lift tab. The ramp
includes a lift tab supporting surface located as close to a pivot axis
of the actuator as is the lift tab. The ramp also includes a ramp guiding
surface that is in contact with a mating surface of the disk drive base.
A fastener selectively allows or prevents relative translation between
the ramp and the disk drive base. The aforementioned contact constrains
the relative translation so that the relative translation changes the
distance between the lift tab supporting surface and the disk axis of
rotation more than the relative translation changes the distance between
the lift tab supporting surface and the actuator pivot axis.