CASTER PARTS & NOMENCLATURE

Top Plate- A horizontal plate for attaching a caster to equipment.

Kingpin (staked kingpin or nut & bolt assembly) - A threaded nut & bolt or staked assembly which
holds the swivel assembly together. The kingpin may also be an integral part of the top plate.
Threaded kingpins can be adjusted to compensate for wear in the swivel assembly.

Swivel Horn Assembly - Consists of a swivel bearing unit. It does not include wheel, wheel bearings,
washers, or spanner bushing components. The spanner bushing is a non-rotating sleeve of
seamless steel that fits over the axle and provides an inner raceway for wheel bearings. It strengthens
the caster by allowing the legs to be tightened against it.

Rigid Horn Assembly - Consists of a rigid or stationary horn unit. It does not include the wheel,
wheel bearings, washers, or spanner bushing components.

Swivel Bearings - Swivel horn assemblies may be supplied with several styles of
swivel bearings. For example:

1. Single Level Ball Race - A single row of balls in a large diameter ball raceway. (Faultless 100 Series)
2. Double Ball Race - Two rows of balls moving independently through two levels of ball races. (All
   Faultless except 100 Series)
3. Ball Bearing Upper Race and Tapered Roller Thrust - A single row of balls in the upper race
   coupled with a precision tapered roller bearing in the lower race.
4. Precision Upper Race and Lower Race Bearings - A self-contained precision load bearing for the
   upper race coupled with a precision tapered roller bearing in the lower race.