What’s the Difference Between Jointed and Seamless Polyurethane O-Ring Drive Belts?
Polyurethane O-rings play a critical role in conveyor systems, machinery, and automated equipment. Understanding the differences between jointed polyurethane O-rings and seamless polyurethane O-rings helps you choose the right component for reliability and efficiency.
Jointed Polyurethane O-Rings
Jointed O-rings are made by cutting polyurethane drive belts to size and welding the ends together. This leaves a small connection mark but does not affect performance.

Key Advantages:
- Easy to install: place directly onto shafts or pulleys and tighten.
- Durable TPU O-rings material ensures excellent wear resistance and flexibility.
- Cost-effective solution for standard industrial applications.
- Jointed O-rings are ideal for equipment where installation simplicity and quick replacement are important.
Seamless Polyurethane O-Rings
Seamless O-rings are produced via injection molding, forming a single continuous ring. They may show mold lines but have no weak points at joints.

Key Advantages:
- High precision and uniformity for demanding applications.
- Superior durability under stress or high-load conditions.
- Smooth appearance and consistent performance.
- Seamless polyurethane O-rings are perfect for machinery requiring high reliability and minimal maintenance.
Why Choose Polyurethane O-Rings?
Both jointed and seamless TPU O-rings share the benefits of polyurethane drive belts:
- Excellent abrasion and chemical resistance
- Flexibility and shock absorption
- Long service life, reducing maintenance downtime
- Choosing the right type depends on your operational needs: jointed for easy installation and cost savings, seamless for high-precision, heavy-duty applications.
Applications of Polyurethane O-Rings
- Conveyor belts in manufacturing and packaging lines
- Rotating machinery and automated equipment
- Protective seals and mechanical drives
- By selecting the proper jointed or seamless polyurethane O-ring, you enhance the efficiency, safety, and lifespan of your industrial systems.
Contact Us for Custom TPU O-Rings
Need custom polyurethane drive belts or TPU O-rings? Our team at Lisen can produce tailored solutions based on your drawings and specifications, ensuring optimal performance in your machinery.




