Polyurethane (PU) vs. Rubber in AGV Drive Wheels: Which Shore Hardness Do You Need?
In automated material handling systems such as AGVs and AMRs, wheel selection is not just a component choice—it directly impacts energy efficiency, load capacity, maintenance cost, and operational reliability. Among all materials, polyurethane (PU) and rubber remain the two most common options. However, as industrial demands evolve, PU is rapidly becoming the dominant choice.
At Hickwall, we often receive a critical question:
“What is the right Shore hardness for my AGV drive wheels?”
To answer that, we must first understand the fundamental differences between PU and rubber—and how hardness affects real-world performance.
PU vs. Rubber: A Direct Comparison of Performance
Rolling Resistance and Energy Efficiency
Rubber wheels are softer and deform more easily under load, increasing rolling resistance and reducing battery life. Polyurethane offers excellent rebound resilience, maintaining shape under load and delivering:
- Lower rolling resistance
- Reduced energy consumption
- Improved battery efficiency
- Smoother and more stable movement
Load Capacity Advantage
For the same wheel diameter, PU wheels typically provide 2–3 times higher load capacity than rubber wheels. This makes PU ideal for:
- Low-profile AGV/AMR design
- Heavy-duty logistics systems
- High-load industrial transport
Understanding Shore A Hardness: The Balance Between Grip and Durability
There is no“perfect”hardness—only the most suitable hardness for your application.
70A–75A: Soft PU
- Better traction
- Superior shock absorption
- Suitable for wet or dusty environments
90A–95A: Hard PU
- Higher wear resistance
- Better load stability
- Prevents flat spotting in long-term operation
Non-Marking Performance: A Hidden Cost Factor
Rubber wheels often leave black marks on floors, increasing maintenance costs. PU wheels provide:
- Non-marking performance
- Cleaner environments
- Reduced maintenance costs
This is essential for cleanrooms, semiconductor fabs, electronics manufacturing, and food processing facilities.
Why Standard Wheels Are Not Enough
Many industrial environments require more than standard products. Challenges include:
- Low temperatures (cold storage)
- Chemical exposure
- Continuous heavy-duty operation
- High-frequency usage
Hickwall Advantage: Application-Based Customization
As a manufacturer, Hickwall can customize polyurethane hardness and wheel specifications based on application requirements, ensuring optimal performance across different environments.
- High-load AGV/AMR systems
- Cleanroom applications
- Automated warehouses
- Cold chain logistics
We provide engineering-driven solutions to ensure long-term performance and reliability.
Conclusion
Polyurethane has become the standard material for modern AGV and AMR systems. Choosing the right Shore hardness is key to maximizing performance:
- Soft PU for grip and shock absorption
- Hard PU for durability and heavy load
- Customized specifications for specific environments
At Hickwall, we help you achieve the best balance between performance and reliability.
FAQ: PU vs. Rubber Wheels for AGV/AMR Applications
1. Is polyurethane better than rubber for AGV wheels?
Yes, PU offers lower rolling resistance, higher load capacity, and non-marking properties compared to rubber.
2. How do I choose the right Shore hardness?
70A–75A for better traction and shock absorption; 90A–95A for higher durability and load capacity.
3. What happens if I choose the wrong hardness?
It may cause faster wear, slipping, increased energy consumption, or flat spotting.
4. Why are PU wheels suitable for cleanrooms?
PU wheels are non-marking and do not leave residue, making them ideal for clean environments.
5. Can PU wheels be customized?
Yes, Hickwall can customize hardness and specifications based on application requirements.
6. How does wheel material affect battery life?
PU reduces rolling resistance, improving energy efficiency and extending battery life.
Contact Hickwall today to find the right AGV wheel solution for your application.