In the selection of load-bearing wheels for movable partition walls, industrial equipment and logistics equipment, the cognitive misunderstanding that "nylon wheels are definitely not as stable as metal wheels" is common. In fact, the stability performance of the two needs to be comprehensively evaluated in combination with specific working conditions. The following is an in-depth analysis from three aspects: material properties, mechanical performance, and application scenarios:
1. Comparison of material properties: basic differences in stability
Hardness comparison: The hardness of nylon wheels belongs to the medium-low range, while the hardness of metal wheels (steel/aluminum alloy) is high
Elastic modulus: Nylon wheels have low elasticity and are easy to deform and buffer. Metal wheels have higher elasticity due to rigid transmission
Self-lubricating property: Nylon wheels contain lubricating additives and do not need to be added externally, but metal wheels need to be regularly filled with grease
Temperature resistance: Nylon wheels can work in the range of -40℃~120℃ and are easy to soften; metal wheels (steel wheels are resistant to high temperatures) can adapt to a wider temperature range and can work in the range of -30℃~300℃
Corrosion resistance: Nylon wheels are more resistant to acid, alkali/salt spray, and metal wheels/steel wheels are prone to rust
Key difference: Nylon wheels absorb vibrations through elastic deformation, and metal wheels transmit force with rigidity
2. Stability influencing mechanism: dynamic balance between load and scenario
Light load scenario
Advantages of nylon wheels: elastic deformation ability can automatically compensate for minor unevenness of the ground (such as 1-3mm gap) and reduce running jitter. Low noise and smooth sliding, avoiding resonance interference, and improving the stability of equipment operation.
Shortcomings of metal wheels: rigid structure is sensitive to ground flatness, and 0.5mm level protrusion can cause vibration transmission.
Heavy load scenario
Advantages of metal wheels: high elastic modulus avoids wheel body collapse, ensures that the contact surface is completely in contact with the ground, and high temperature resistance (such as welding workshop) prevents the wheel body from softening and becoming unstable.
Risks of nylon wheels: prone to deformation under long-term heavy load, resulting in loose shaft holes.
Special environment
Humid/corrosive scenario: maintenance-free characteristics of nylon wheels significantly reduce the risk of jamming due to rust.
Clean room scenario: evaporation of metal wheel grease may pollute the environment, and dry operation of nylon wheels is more suitable.
3. Correction of misunderstandings and selection suggestions
Misunderstanding 1: "Metal wheels = absolute stability"
Rigid structures will amplify vibrations on uneven ground, and need to be equipped with shock-absorbing springs or elastic foot cups
Misunderstanding 2: "Nylon wheels cannot be overloaded"
Glass fiber reinforced nylon wheel bodies can withstand 1200kg/wheel and have been used in airport luggage carts
4. Optimization plan
Mixed configuration: metal wheels for main load-bearing wheels, nylon wheels for auxiliary wheels (to absorb lateral forces)
Surface treatment: galvanized/Dacromet-plated metal wheels for rust prevention, nylon wheels with UV coating for anti-aging
Ground conditions: Flatness <1mm, nylon wheels are preferred (elastic compensation); potholes/debris are mostly prevented from derailment by metal wheels + guide wheels
Operation frequency: high-frequency movement uses nylon wheels with low wear characteristics to extend service life; long-term static selection of metal wheels has outstanding anti-creep advantages
Conclusion
Stability is the comprehensive result of material properties, working conditions and design optimization. Nylon wheels and metal wheels are not substitutes, but complementary. The former uses "softness" to overcome hardness, while the latter uses "hardness" to maintain stability. Accurately matching scene requirements is the core of selection.
