Fixed bracket with solid PA6 wheel, mounted with top plate, 400 kg

Caster in a fixed bracket with a solid PA6 wheel, top plate

This is a caster in a fixed bracket where the whole wheel body is molded in one piece of PA6, so both tread and hub in the same nylon. The hardness is around 75 Shore D, which is a really hard surface. A homogeneous plastic wheel like this is made to roll easily and carry load on even, hard floors, and it takes the daily wear in a workshop or a warehouse.

The hard material is the whole point. PA6 has low rolling resistance, so the wheel gets going with little force and rolls on by itself. That shows clearly along long corridor stretches and with many moves during a day; a hard tread simply offers less resistance than a soft one. The plastic also has low friction against the axle, takes most oils, greases and mild chemicals and is unaffected by moisture.

There is a downside to know about. A hard wheel passes unevenness straight through, so the ride is noisier than with a rubber or polyurethane wheel, and a hard tread can scratch painted or sensitive floors. Compare it with a soft elastic wheel, which rolls more quietly and spares the surface but has higher rolling resistance and carries less. You choose the solid PA6 wheel when the floor is hard and even, when you want to roll easily and skip maintenance, and when quietness is not the most important thing.

Since the wheel is solid, the plastic works both as the running surface and as the load-carrying body. That gives a simple and tough wheel with no separate tread that can come loose. Both a plain bearing and a ball bearing are offered here. The plain bearing is maintenance-free and handles dirt and wet, but gives slightly higher rolling resistance. The ball bearing rolls more easily and gives a smoother ride, a good choice on carts that are moved often. Which one you choose depends on how heavy and how often the wheel has to work.

The fixed bracket locks the direction so the wheel rolls straight ahead without swiveling. That gives stable tracking, and it is often fitted in pairs at the rear of a cart, with swivel casters at the front for steering. The bracket is fastened with a top plate with four screw holes, a fastening that spreads the load and holds the caster steady even with repeated loading.

The wheels come in diameters from 100 to 125 mm and carry up to 150 kg per wheel. A larger diameter rolls more easily over joints and thresholds and lowers the rolling resistance further, while a smaller one keeps the overall height down where space under the equipment is short. The range makes the series suitable for medium-heavy transport carts and machine underframes.

Where does it fit? The PA6 wheel sits well under material carts, pallet rack carts, machine bases and equipment that rolls on concrete, tile or painted industrial floor. The fixed bracket holds the track on straight stretches and the hard wheel rolls easily even with a full load. Industries such as the workshop industry, warehousing and production get use out of exactly this combination of low rolling resistance and little upkeep.

Think about the operating environment. PA6 is happiest at normal indoor temperature and in dry to damp premises and is unaffected by wet. The caster suits less well on soft, uneven or sensitive floors, where an elastic wheel gives better grip and a gentler ride.

Would you like to know whether a plain bearing or a ball bearing suits your use best, and which diameter matches the load? Get in touch and we will go through the surface and the load together.