TM 1-1520-238-T-7
11–12
11–2.
LOCATION AND DESCRIPTION OF MAJOR COMPONENTS (cont)
11–2
(d) The self-aligning spherical and slider bearing (uniball) is located between the stationary and rotating
swashplate. The spherical ball allows the swashplate assembly to tilt for cyclic control movements. The slider
bearing allows the entire swashplate assembly to control collective movement by moving up or down the static
mast as a unit. The upper and lower bearing retainers secure the self-aligning spherical and slider bearing, and
the double-roll ball bearing assembly. The upper bearing retainer mounts to the stationary swashplate. The lower
bearing retainer mounts to the rotating swashplate.
(10) Pitch Link Assemblies.
Four adjustable pitch link assemblies, mounted between the swashplate and
horns on the pitch housings, receive control inputs from the rotating swashplate and transmit the inputs to the
pitch change horns. The pitch link assemblies are adjustable to facilitate main rotor blade tracking procedures.
(11) Scissor Assemblies.
The scissor assemblies, connected to the swashplate and main rotor hub,
consist of a lower arm and and upper arm. The scissor assemblies transmit rotational power to the rotating
swashplate. The load bearing scissors assembly drives the rotating swashplate.
