Swivel casters are a basic technical product that is used for practically every type of transport equipment today. They rotate on their vertical axis and make appliances and machines manoeuvrable. A swivel caster consists of a swivel bracket and one or two wheels. Swivel casters with two wheels are known as twin wheel swivel casters.
To enable a smooth swivel motion of the fork, the wheel is generally fitted with a horizontal distance between the axis of the swivel bearing and the wheel, known as the offset. If correctly dimensioned, the offset allows a smooth swivelling of the castor without the use of additional tools. It also provides the swivel casters with directional stability when travelling straight. Swivel casters can be equipped with brake systems to lock the rotary motion of the wheel (wheel brake), the rotary motion of the wheel and the swivel motion of the fork (wheel and swivel head brake), or the swivel motion of the fork (directional lock).