Swivel bracket with twin wheel, PP hub and PUR tread, 70 kg

Twin wheel in a swivel bracket with a PUR tread and PP hub, top plate

Here is a swiveling twin wheel where two running surfaces in polyurethane sit side by side on a hub in polypropylene. The twin design spreads the load over two wheels, which gives a wider base to stand on and a calmer run than a single wheel of the same size. The tread is cast polyurethane with a hardness of around 98 degrees Shore A, a wear-resistant material that rolls easily and holds its shape under load.

Since the tread is comparatively hard, the rolling resistance is low. The cart gets moving with little force and rolls on easily, which saves both your back and time when the caster starts and stops often through a working day. At the same time the polyurethane is kinder to the floor than hard plastic and steel; it gives a more even contact with the surface and does not scratch as easily. The material stands up to oil, grease and mild chemicals, which makes it useful in workshops and production.

A comparison helps to place the wheel. A softer wheel, for example in rubber or soft polyurethane, runs more quietly and absorbs shocks better on a rough surface, but takes more force to move and carries less weight. The harder PUR wheel prioritizes low rolling force and load capacity instead. On a smooth indoor floor where the load has to be moved easily this is the choice; on an uneven surface where comfort weighs heaviest a softer tread suits better.

The polypropylene hub is light and free from corrosion, which makes the caster untroubled by moisture and easy to clean. The bearing is a plain bearing. It is a tough and maintenance-free solution that handles dust and wet without binding, and that suits the moderate load the series is made for. The rolling resistance is somewhat higher than with a ball bearing, but in return the bearing needs no attention.

The wheels come in diameters from 50 to 75 mm and carry up to 100 kg per wheel. A larger diameter rolls more easily over thresholds and joints and lowers the rolling resistance, while a smaller one keeps the overall height down where the space under the cart is low. The twin tread means the caster stands steady even when the load is in the upper part of the range.

The bracket swivels through 360 degrees, so the wheel follows through the turns and makes the cart able to turn in a tight space. Mounting is with a top plate, a square mounting plate with four screw holes, which gives a stable fastener against a flat surface and spreads the forces widely. It suits carts and frames with a standardized plate hole. The caster comes both with a wheel brake, which locks the wheel, and with a total lock brake, which locks the wheel and the swivel at the same time.

Where is it useful? This swiveling twin wheel with a top plate suits transport carts, material carts, cleaning carts and lighter machine underframes indoors. The top plate makes it easy to screw on under a flat frame, and the twin tread gives a stable and comfortable run on warehouse and workshop floors.

Think about the operating environment. Polyurethane wants normal indoor temperature and dry to slightly damp spaces. If the caster is left standing under full load for a long time, the tread can take a temporary flat spot that disappears once it has been rolled for a while; that belongs to elastic materials and does not affect service life.

Do you want help choosing diameter, load capacity and brake type for your particular cart? Get in touch and we will go through load and flooring together.