- Wheel Diameter: The nominal diameter of the outside of the wheel, this typically describes the basic size of the castor (i.e. a 150mm wheel diameter castor is typically referred to as a 150 castor).
- Swivel Radius: The distance from the center of the fastening to the outer most point of the caster. This specifies the minimum clearance required for a mounted caster to swivel a full 360 degrees.
- Mounting Height: The vertical distance between the bottom of the wheel and the mounting point of the unit.
- Load Rating: The load a castor is designed to carry on a continuous basis. Load is assigned on a per caster basis. To determine the load based on the number of casters on a unit, divide the total weight by the number of castors.
How easy will my item be to push?
What is "Load Rating / Load Capacity"?
"Load Rating or Load Capacity" is typically the weight that a single castor or wheel can carry without breaking or jamming. If you are using four castors, the total capacity would be the sum of the "load rating" of each of the individual castors used. That said, we recommend that you only load to 70% of the combined Load Rating of the castors for safety reasons.
Type of floor surface
In order to determine the proper castor for your application, you need to consider the type and condition of the floors they will be rolling on. Wheels with soft non-marking rubber wheel will provide the best floor protection on hardwood floors, such as in your home or in a school gymnasium. Castors with Polyurethane treads provide floor protection when soft rubber wheels lack the needed capacity. There are also countless applications where only a hard plastic or metal wheel will do the job. Each castor has numerous applications for which they are best suited
What type of castor do I use for hardwood floors?