Fixed bracket with twin wheel and industrial caster with cast iron hub and PUR tread, mounted with top plate

Industrial caster in a fixed bracket with twin wheel, PUR tread and cast iron hub

This is an industrial caster with two wheels side by side in a fixed bracket, a tread in cast polyurethane and a hub in cast iron. The design is made for really heavy transport that has to roll straight ahead, and the twin wheel spreads the load across two running surfaces instead of one. That gives a wider footprint and a steadier run, which shows clearly when the cart is fully loaded and has to hold its line across a workshop floor.

The PUR tread has a hardness of 93 degrees Shore A. It is a firm polyurethane that takes a high point load without deforming, and at the same time it is far gentler on the floor than a wheel in plain plastic or steel. The polyurethane resists oil, grease and most of the mild chemicals found in a workshop, and it wears slowly even in daily use.

How does it roll? A hard tread like PUR gives low rolling resistance; it is barely compressed against the floor, so the caster gets moving with little force and rolls on easily. That is the difference against a soft rubber wheel, which settles against the floor and cushions more but needs more force at every start. Choosing PUR means you put easy running and high load capacity ahead of maximum shock absorption; if the goods have to be protected from vibration on an uneven floor, a softer wheel suits better.

The cast iron hub is the body of the wheel. It is stiff and dimensionally stable even under a heavy load, and that is why the series handles load capacities up to 6300 kg per twin wheel. Inside sit double ball bearings that put the load on two rows of balls and keep the running smooth even when the wheel turns hour after hour.

The wheels come in diameters from 125 to 400 mm. A larger diameter rolls more easily over joints, cable ducts and thresholds and lowers the rolling resistance further, while a smaller one keeps the overall height down where ceiling height or platform height is limited. The bracket is fixed, so the caster follows a straight line and will not turn sideways. That makes it a natural choice at the rear end of a cart, where fixed casters steer the direction and swivel casters at the front handle the maneuvering.

Where does it fit? This twin wheel goes under heavy transport carts, platform carts, machine underframes and gantry or assembly carts in manufacturing industry and warehouses. The high load capacity makes it suitable where a single running surface is not enough, for example under machines that have to be moved or under pallet carts with a concentrated load. Mounting is with a top plate and four screw holes, which gives a stable hold against a flat underframe.

Think about the operating environment. Polyurethane is happy at normal indoor temperature and in dry to slightly damp surroundings. At very low temperatures the tread gets stiffer, and if the caster stands still for a long time under full load the running surface can take a small flat spot that rolls out after a while. That is normal for polyurethane and does not affect the durability.

Are you unsure which diameter suits your cart and how the load is spread across the casters? Get in touch and we will go through the weight, the floor and the overall height together before you choose.