Today, I will tell the truth that I dare not speak openly in the industry, and after reading it, I will save at least 30% of the budget.
1. Bracket color ≠ quality level
Silver is electroplated zinc, black is sprayed black paint, and the cost of the two processing methods is almost the same. Simply place an order based on appearance. Don’t be fooled by the saying ‘the thicker the coating, the more rust proof it is’. The real determinant of rust prevention ability is the duration of salt spray testing, not the color.
2. Side brake or double brake? First check the export location before placing an order
90% of orders from Europe and America use side brakes – they have a simple and inexpensive structure, and if they break, the entire wheel will be scrapped;
90% of domestic e-commerce platforms use dual brakes – with online appearance and an additional installation height of 3mm, which is 8% -12% more expensive.
Conclusion: Choose side brakes for equipment exports and dual brakes for popular domestic products, with no difference in functionality. Don’t mistake “beauty tax” for “performance tax”.
3. Are iron core wheels more durable? It’s purely a rumor from the last century
The same 4-inch wheels, high-strength nylon injection molded version with dynamic load-bearing capacity of 280 kg, cast iron version with 260 kg, are heavier, louder, and more prone to rust. The reason why cast iron wheels can still survive today is only one – when the price of cast aluminum increased, it was 0.8 yuan/piece cheaper.
4. “Iron content=corrosion resistance” is a sales slogan
PU, nylon, and rubber wheels from legitimate manufacturers have all passed the 48 hour neutral salt spray test, while the iron core wheels started to rust after 24 hours of testing due to electrochemical corrosion. Spending 15% more money to buy a “rusty load-bearing artifact” is unfair?
5. Are rubber wheels necessarily softer than PU? Adjustable! Adjustable! Adjustable!
Adding an additional 5% plasticizer to the formula can increase the hardness of rubber wheels to 95 A, which is harder than nylon; A PU of 65A can be used as a ‘silent cotton jacket’. Before placing an order, ask the seller to show you a Shore hardness tester, don’t be fooled by the words’ soft rubber ‘anymore.
6. Double bearings=high-end, single bearings=low-end? Look at the scene!
Double bearings: high static load, low noise, 30% expensive, suitable for medical equipment and high-end dining cars;
Single bearing: high dynamic load, low starting resistance, 30% cheaper price, suitable for logistics carts and turnover baskets.
Installing the double axis bearing onto the foot of the assembly line will only slow down the pace; The nurse complained about the noise the next day after installing the single bearing in the ICU bed. Take the right medicine, don’t blindly ‘double up’.
7. The unit of measurement is inches, not “market inches”!
The commonly referred to 3-inch, 4-inch, and 5-inch sizes in the market all refer to inch 1 “=25.4 mm.
3 inches ≈ 75 mm, 4 inches ≈ 100 mm, 5 inches ≈ 125 mm.
Writing 4 inches as “100 mm” is fine, but writing it as “4 market inches” (≈ 133 mm) is just waiting for a return.
Post time: Oct-14-2025
