"Wheels that crack, split or bulge out at the sides" are the most common problem in factories that move heavy loads, and they usually happen sooner than they should because the wheels chosen could never really carry the load.
The Real Causes
- Tread unsuited to the load: nylon or plastic wheels are brittle and crack easily under impact
- Core too thin: a thin pressed-steel core can't withstand side forces, so the wheel "bulges" under full load
- Overloading: the load rating chosen is lower than the real load, with no allowance for impacts
- Uneven floors: frequently dropping into gaps or off edges multiplies momentary impact forces
The Hidden Costs
A wheel breaking mid-route damages goods, stops work, wastes time on frequent wheel changes and can injure staff — in total far more expensive than choosing the right wheel from the start.
How IRONMAX Solves This
- 5.5 mm thick cast-iron core: keeps its shape without deforming, even at full rated load
- Tough PU tread: absorbs impacts well and isn't brittle like plastic
- Sized with a safety factor: the 6-inch model carries 350 kg per wheel (1,400 kg per set)
Wheel selection rule: divide the total weight by 3 (not 4), then add a 1.5–2× margin to get a safe load rating per wheel that won't crack or deform