Offset swage baseplate for stacked assembly

A hard disk drive (HDD) comprising:

• a plurality of disk media rotatably mounted on a spindle;
• a first head slider housing a first read-write transducer configured to read from and to write to a first disk medium of the plurality of disk media;
• a second head slider housing a second read-write transducer configured to read from and to write to a second disk medium of the plurality of disk media;
• a voice coil actuator configured to move the first head slider and the second head slider to access portions of the respective first disk medium and second disk medium;
• and
• a head stack assembly (HSA) coupled with the voice coil actuator, the HSA comprising:
• an actuator arm,
• a first offset swage plate coupling a first suspension housing the first head slider to and extending in a longitudinal direction from a first side of the actuator arm, and
• a second offset swage plate coupling a second suspension housing the second head slider to and extending in the longitudinal direction from an opposing second side of the actuator arm;
• wherein each of the first and second offset swage plates, having a lateral direction normal to the longitudinal direction, comprises:
• a planar main body,
• a swage through-hole through a first lateral side of the main body, the swage through-hole comprising a swage boss around the perimeter of the swage through-hole and extending substantially normal to the main body, and
• a clearance hole through an opposing second lateral side of the main body, the clearance hole void of a swage boss.

A method of assembling a head stack assembly (HSA), the method comprising:

• swage-coupling a first suspension to and extending in a longitudinal direction from a first side of an actuator arm via a swage boss of a first offset swage plate;
• and
• swage-coupling a second suspension to and extending in the longitudinal direction from an opposing second side of the actuator arm via a swage boss of a second offset swage plate;
• wherein each of the first and the second offset swage plates, having a lateral direction normal to the longitudinal direction, comprises:
• a planar main body,
• a swage through-hole through a first lateral half of the main body, wherein the swage boss is positioned around the perimeter of the swage through-hole and extending substantially normal to the main body, and
• a clearance hole through an opposing second lateral half of the main body, the clearance hole void of a swage boss.

A head gimbal assembly (HGA) comprising:

• an offset swage plate;
• and
• a suspension coupled with and extending in a longitudinal direction from the offset swage plate;
• wherein the offset swage plate has a lateral direction normal to the longitudinal direction and comprises:
• a planar main body,
• a first through-hole through a first lateral half of the main body, the first through-hole comprising a swage boss around the perimeter of the first through- hole and extending substantially normal to the main body, and
• a second through-hole through an opposing second lateral half of the main body, the second through-hole having no swage boss.