CASE STUDIES
Swivel vs Fixed Castors: Which to Use and When
Swivel or fixed: the short answer
A swivel castor turns freely so the load can change direction, while a fixed castor only rolls forwards and backwards in a straight line. Most trolleys, racks and hand carts do not use one or the other on their own. They use a combination, and the layout of that combination decides how easily the equipment steers and tracks.
What a swivel castor does
A swivel castor is mounted so the wheel can rotate a full circle around a vertical pivot. Push the trolley in a new direction and the wheel follows, which lets the load be steered and turned in tight spaces. This freedom is what makes a cart manoeuvrable. However, a set of four swivel castors on their own can feel unstable and wander, because nothing holds a straight line.
What a fixed castor does
A fixed castor, sometimes called a rigid castor, has the wheel locked to roll in one direction only. It cannot pivot, it cannot turn. On its own it keeps the load moving straight and true.
How they compare
| Feature | Swivel castor | Fixed castor |
|---|---|---|
| Movement | Turns a full circle to steer | Rolls straight only |
| Best at | Manoeuvring in tight spaces | Holding a straight line |
| On its own | Manoeuvrable but can wander | Stable but cannot turn |
| Typical role | Steering end of a trolley | Tracking end of a trolley |
Combining them in practice
The usual approach is to mix both types so the equipment can steer and still track straight. Common patterns for hand-moved trolleys, shelving and carts include:
- Two fixed at one end, two swivel at the other. The fixed pair holds a line while the swivel pair steers. This is a stable, easy-to-control setup for longer pushes.
- Four swivel castors. Maximum manoeuvrability, including sideways moves and turning on the spot. Best where space is very tight and travel distances are short.
The right mix depends on how the equipment is moved: mostly pushed in straight runs, mostly shuffled around in a small area, or a bit of both.
Adding a brake
Either type can be supplied with a brake so the trolley stays put when parked. Braked castors are worth adding wherever a loaded rack or cart must not roll away on its own, for example on a slight slope or a busy floor.
Choose your brakes here: castor locks for industrial trolleys and racks.
Getting the layout right for the job
The best arrangement depends on how the trolley or rack is actually used from day to day:
- Long, straight pushes down aisles or corridors. Two fixed and two swivel gives the steadiest run, because the fixed pair stops the load wandering off line.
- Frequent turning in a tight bay or work cell. Four swivel castors let the load pivot and shuffle sideways where there is no room for a wide turn.
- Parking on a slope or a busy floor. Brakes on the swivel castors keep the load where it is left.
- Heavier loads pushed over distance. Keeping a fixed pair at one end helps the operator hold a line without fighting the trolley.
It is worth thinking about the heaviest and most awkward moves the equipment will make, not just the easy ones, because those are where a poor layout shows up as a trolley that is hard to steer or will not track straight.
A note on materials
Like other castors, swivel and fixed units can be fitted with different wheel materials to suit the floor and the setting, such as rubber for outdoor use or polyurethane and plastic for indoor floors. The steering behaviour comes from the swivel or fixed mount, while the wheel material affects grip, noise and floor protection.
To see the range of swivel, fixed and braked options, visit AVM's industrial castor category.
Frequently asked questions
What is the difference between a swivel and a fixed castor?
A swivel castor rotates a full circle so the load can be steered. A fixed castor only rolls in a straight line and cannot turn.
Should all four castors be swivel?
Only if you need to turn on the spot in a very tight space. For longer pushes, two fixed and two swivel gives better control and a steadier straight line.
Which castors take the brake?
Either type can be braked, but braked swivel castors are the most common choice for parking a trolley securely.
Where should the fixed castors go?
Fixed castors usually go at one end to hold a straight line, with the swivel castors at the other end doing the steering.
Can I use all fixed castors?
Only if the load never needs to change direction, which is rare. Without swivel castors the trolley cannot turn, so most setups include at least two.
Do swivel castors wear faster than fixed ones?
They wear in different places. Fixed castor treads will wear out faster, and swivel castors tend to wear out faster at the swivel, due to bearing wear and tear.