When to use expander-fitting castors
Expander castors are the go-to solution wherever you need to add mobility to hollow tube legs without welding brackets or drilling plates. The range includes swivel, fixed and braked options across a spread of wheel materials, sizes and load capacities, with expanders sized to suit common internal tube dimensions. Because the fitting expands to match the bore, it accommodates slight variations and holds firmly in service, while still allowing castors to be swapped out when wheels wear.
Getting the right expander size
The key to a reliable fit is matching the expander to your tube's internal diameter (for round tube) or internal dimensions (for square tube), along with the load per castor and the wheel material for your floor. If you can measure the inside of your tube and tell us the load, our technical team can identify the correct expander size and castor for the job.
Order expander castors from Merlin
Merlin has supplied UK industry with castors and wheels for more than 30 years, offering competitive pricing, UK-mainland delivery and a £50 minimum order. Browse the range below to compare expander sizes, wheels and capacities, and see the wider Castors & Wheels range for plate and bolt-hole alternatives. For help matching an expander to your tube, call 01752 690622.
