A mobile pedestal under an office desk, a kitchen serving trolley, a toy box in a child's room, a coffee table on wheels in the living room: all of these share one detail, the castor. When castors are chosen badly, the pedestal marks laminate floors, catches on rugs, rolls away at every touch or starts squeaking after a year or two. Size, material, fixing and brakes should all be considered together.
Wheel material to suit the floor
The material of the part that touches the floor is the most important choice. The general rule is simple: soft wheels for hard floors, hard wheels for soft floors.
- For hard floors such as laminate, parquet, tiles and vinyl, choose wheels with a soft tread such as polyurethane or rubber. They are quieter, do not scratch and do not skid.
- For rugs and carpet, hard plastic wheels such as nylon work better. A soft wheel sinks into the pile and makes movement harder.
- In homes with both, such as a rug on laminate, soft-tread wheels of slightly larger diameter can be a compromise.
Using hard wheels on hard floors is the most common mistake: the pedestal becomes noisy, streaks appear on the floor and it slides away easily.
Diameter and load
Wheel diameter affects how easily furniture moves. A larger wheel rolls over small obstacles, rug edges and floor transition strips more easily and needs less effort. A small wheel keeps the furniture low and discreet but can catch on pile or thresholds.
Every castor has a load limit set by the manufacturer. When choosing, add the furniture's own weight to the weight of its contents and divide by the number of castors. There is a subtlety: on an uneven floor the load does not fall equally on all wheels, and sometimes one wheel carries more. So it makes sense to allow a margin. Heavy filing pedestals, book trolleys and full kitchen trolleys need castors with a higher load rating.
Swivel and fixed castors
Castors come in two main types. A swivel castor turns 360 degrees around its axis, letting furniture move in any direction. A fixed castor moves only in one direction.
In practice a combination is chosen:
- four swivel castors are the most flexible option on small mobile pedestals;
- on long trolleys, two swivel and two fixed castors keep straight-line movement stable and make steering easier;
- on heavy furniture, some of the swivel castors should have brakes.
Brakes and stability
Furniture on wheels should not move while in use. It can roll when someone leans on a pedestal, takes something off a trolley or a child climbs onto a wheeled box. Braked castors remove this risk.
Types of brake:
- a brake that stops only wheel rotation while the castor can still swivel;
- a total lock that blocks both rotation and swivel, the most stable option;
- load-sensitive castors that lock automatically when weight is applied, more common on office chairs.
On four-wheeled furniture, at least two braked castors are recommended. Brakes are particularly important for wheeled furniture in children's rooms.
Fixing method
How the castor is attached directly affects its lifespan:
- plate-mounted castors are screwed to the base with several screws and spread the load over a wide area, making them reliable for heavy furniture;
- stem castors fit into a hole or socket in the base and look more compact, but the material they are fixed into must be strong;
- castors fixed into thin board can work loose over time, so the base should be reinforced.
The base of a pedestal is usually treated as the least loaded part of the carcass, but on a wheeled model all the weight goes through it. Base thickness and fixing positions should be chosen accordingly.
Appearance and height
Castors add to overall furniture height. For an under-desk pedestal this is especially important: the pedestal's height including castors must be less than the clearance under the desk, with room to pull it out and push it back easily. Exposed castors look technical, while small or concealed castors set under the furniture make it look lighter and neater. Castor colour can be matched to legs or other metal details.
Zaferoglu Mebel makes mobile pedestals for offices and homes to individual measurements. When ordering wheeled furniture, sharing the floor type, the approximate weight of the contents and the clearance under the desk allows the right castors to be chosen.
