End washers are pressed in the ends of the hub to hold the bearing in place. A hardened and ground steel sleeve fits over the axle between the two sides of the caster fork; it is held rigid with a threaded axle bolt. This provides a hardened precision inner race for the bearing and also greatly increases the strengths of the caster.
More than just a seller of wheel bearings and front wheel bearings, we are a wheel bearing manufacturer. Located in Lancaster, PA we have been making custom wheel bearings, rollers and heavy duty casters and bearings since 1905.