Swivel vs rigid casters.
The layout question is older than the industry: which corners steer, which corners track? This guide covers the three standard layouts and the equipment shapes each one serves.
Default: two swivel + two rigid (rigids on one end) — tracks straight over distance, steers from the swivel end; the right answer for most carts and equipment. All-swivel: for tight spaces where equipment must rotate or move sideways, at the cost of wandering on long pushes. Diamond layout (rigids amidships, swivels at the ends): for very long equipment that must pivot in place.
The two-and-two standard
Two rigid casters on one end act as the equipment's keel: they define the direction of travel and resist side drift. Two swivels on the other end steer. Push from the swivel end and the equipment behaves like a well-mannered cart — straight down the aisle, turning on the operator's input. This is why the heavy duty line sells its models as swivel/rigid pairs sharing one plate standard, and why most platform trucks, benches and cabinets you have ever pushed were built this way.
All-swivel: manoeuvrability at a price
Four swivels let equipment move in any direction and spin in place — essential in lifts, tight cells and retail floors, which is why shopping carts and roll cages run all-swivel. The price is control over distance: with no fixed direction, a loaded all-swivel cart wanders and needs constant correction, and starting it in the intended direction takes a shuffle. If the equipment travels far in straight lines, all-swivel is the wrong default no matter how good it feels in the showroom.
The diamond layout
Very long equipment — long racks, pipe carts, extended platforms — can run two rigid casters near the middle (taking most of the load and defining a pivot) with swivels at both ends. The equipment turns around its centre with minimal effort. It is a specialist layout; if your equipment is long enough to consider it, the RFQ conversation is worth having before ordering.
Brakes and locks within the layout
- Brakes belong on the swivel end, at the operator's position — total-lock where the equipment must not walk.
- Directional locks convert a swivel into a temporary rigid for long pushes: the compromise layout for equipment that both travels distance and manoeuvres tight. Ask for them explicitly if your route mixes corridors and open floor.
- One layout per fleet — mixed layouts across identical equipment confuse operators and maintenance; standardise, and record the layout in the equipment's specification.
Whichever layout you choose, it becomes part of the locked specification with the caster models it uses — so the replacement order three years from now rebuilds the same handling your operators learned.
Related guides
Specification first. Price second.
Every guide on this site ends at the same place: a locked specification and a sample that proves it.