Expanding rubber adapter kits for installing casters into hollow round or square tube legs — chairs, furniture, scaffolding, retail fixtures, lab equipment. The rubber expander compresses inside the tube and grips, giving a stem caster a stable mount. Eliminates the need to drill or weld a permanent mount. Various OD/ID combinations stocked at our Mansfield, TX facility.
Expanding adapters give you a way to add casters to equipment that has hollow legs but no factory-installed sockets. The rubber expander compresses inside the tube, grips the inside wall, and creates a stable threaded mount for a stem caster.
The adapter expander size matches your tube's inside diameter (ID). Common sizes: 5/8, 3/4, 7/8, 1 inch tube ID.
The expanding adapter provides a threaded socket. Match your stem caster to the adapter's thread (typically 1/2-13 or 3/8-16).
Most expanders fit round tubes. For square tube, you need a square-tube version. Verify tube shape before ordering.
The expander grip is the load limit, not the caster. Most adapters hold 200-400 lb. For heavier loads, use a welded socket.
Need help? Contact CasterHQ for support.
CasterHQ stocks 9 configurations at our Mansfield, TX facility. 99 percent ship same or next business day.
A rubber expander that compresses inside a hollow tube to create a stable mount point for a threaded stem caster. No drilling or welding required.
5/8, 3/4, 7/8, 1 inch most common ID sizes. Round tube standard, square tube available.
Typically 200-400 lb per caster. The expander grip is the limit.
Most fit round. Square versions available.
Insert into tube, tighten the bolt/screw to expand the rubber, screw the stem caster in.
99 percent same or next business day from Mansfield TX.
