100mm Top Plate Fixed Castor (Pressed Steel) with 80x60mm Bolt Hole Centres. Nylon Wheel with Roller Bearing. Load Capacity = 250kg
Nylon is a high quality, low maintenance, impact resistant wheel that has a high load capacity. The nylon material is extremely resistant to salts, greases, acids and alkalis and will not mark or damage concrete floors. This makes Nylon probably the most castor wheel material.
The wheel has a roller bearing in the hub (central part of the wheel) which consists of rollers made of steel within a cage. These rollers rotate between the axle tube and the wheel hub. This makes the rolling resistance of the bearing relatively slight, even under heavy loads. Roller bearings are rugged, robust and largely maintenance-free.