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6 Inch Spring Loaded Casters · 1,500 lb · Polyurethane

Diameter: 6 inTread: 2 inPlate: 4 x 4-1/2 inCapacity: 1,500 lb each
6 x 2 in spring loaded casters with polyurethane wheels, in swivel and rigid. Instead of a steel coil, the suspension uses a solid polyurethane spring that will not rust and resists fatigue. Ergonomic versions use a polyurethane on aluminum wheel. Rated up to 180°F.

What the spring does

A spring caster lets the wheel move up under a bump so the shock does not pass straight into the cart. That protects electronics, glass, molds and other fragile loads, and it keeps all four wheels on an uneven floor [S1].

Polyurethane spring vs steel coil

These casters use a solid polyurethane spring block. It does not corrode in wet areas and it holds its rate over time. Steel coils can give more travel but can rust and lose tension. The swivel rig runs on a thrust bearing, and the frame is chrome plated [S1].

Model Wheel Rating Height
Swivel and rigid Polyurethane 1,500 lb 7-1/2 in
Ergonomic swivel and rigid Polyurethane on aluminum 1,500 lb 7-1/2 in

From product fields [S1].

Sizing tip

A spring caster works best when the load is in the middle of its range. Far below the rating, the spring barely moves and gives little cushioning; at the limit, it bottoms out on bumps.

6 in spring caster questions

How much can these 6 in spring casters hold?

Each is rated 1,500 lb.

What kind of spring do they use?

A solid polyurethane spring, which does not rust and resists fatigue.

What plate size do they use?

4 x 4-1/2 in. Overall height is 7-1/2 in.

Sources

  • [S1] CasterHQ product fields (rated load, diameter, width, wheel and core material, temperature range, mount) and product descriptions for the items on this page, pulled October 20, 2026.

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