Fast Answer: Casters are load-bearing wheel assemblies used to move equipment, carts, machinery, and industrial systems. Proper selection depends on mounting type, wheel material, load capacity, floor condition, and shock environment.
Types of Casters
Casters are divided into two primary mounting styles:
- Plate Casters – Top plate mounted to flat surfaces
- Stem Casters – Threaded, grip ring, or expansion mounted into legs or tubes
Wheel Materials Explained
| Material | Best For |
|---|---|
| Polyurethane | Concrete floors, warehouse carts |
| Phenolic | High capacity, dry environments |
| Nylon | Low rolling resistance |
| Rubber | Shock absorption |
Load Capacity & Safety Factor
Correct load calculation prevents failure.
Total Equipment Weight ÷ Number of Casters × 1.3 safety factor.
Kingpin vs Kingpinless
Kingpinless construction eliminates the central rivet, increasing durability under shock.
Heavy Duty & Industrial Casters
Heavy-duty casters require larger plates, wider wheels, and reinforced swivel assemblies.
Shock loading, debris, and uneven floors demand upgraded construction.
Replacement Wheels & Parts
Many buyers only need raw wheels or replacement parts.
How to Choose the Right Casters
- Calculate load capacity
- Select mounting style
- Match wheel material to floor
- Determine need for kingpinless
- Verify plate size or stem dimensions