In the mechanical transmission system, as a key power transmission component, timing belt is widely used in many kinds of automation equipment, conveying system and precision machinery. According to different material, the toothed belt is usually divided into PU (polyurethane) and rubber timing belt. These two types synchronous belt each have their own unique advantages and application situations, the selection of timing belt type depends on the actual application requirement and operating environment. This passage will analyze the material and performance differences between PU and rubber synchronous belt, and discuss their advantages and disadvantages in different applications.
Material Composition
Rubber timing belt: Rubber timing belt is mainly made of natural rubber or synthetic rubber, the inside with fiber glass core. The rubber material has good elasticity and toughness and is suitable for transmission systems with moderate loads and speeds.
PU timing belt: PU toothed belt is made of polyurethane material with steel or Kevlar core. PU has higher wear resistance, aging resistance and chemical resistance and are suitable for high-precision, high-load and high-speed transmission systems.
Performance Difference
- Strength and stiffness: Due topolyurethane material isharder and more durable, PU timing belt has higher strength and rigidity than that of rubber timing belt. PU timing belt is generally 90 shore A, rubber synchronous belt is normally 70 shore A.
- Wear resistance: The surface of the rubber timingbelt is easy to wear, crack or aging, while the polyurethane synchronous belt has better wear resistance.
- Load resistance: Compared with rubber synchronous belt, polyurethane toothedbelt can withstand greater load.
- Accuracy: The accuracy of polyurethane timingbelt is higher than that of rubber timingbelt.
- Chemical resistance: PU timingbelt has excellent chemical resistance and can resist the erosion of various chemical substances, which is suitable for the transmission system in special chemical environment.
- Elasticity: Rubber timingbelt has good elasticity and toughness, suitable for occasions that require better flexibility and elasticity.
- Transmission efficiency: PU timingbelt has high transmission efficiency, which can maintain high transmission efficiency in the transmission system with high precision, high load and high speed.
- Operating temperature: Rubber timing belt can resist high temperature, it can work at -20 ℃ to 110 ℃, while PU timing belt operating temperature is -10 ℃ to 80 ℃.
Application
Rubber timing belt: Rubber synchronous belt is widely used in agricultural machinery, household appliances, automotive industry, labeling and printing industry where require shock absorption and buffering.
PU timing belt: PU toothed belt is suitable for automation, food processing, textile machinery and medical equipment, especially in the situation where require oil and chemical resistant.
Selection Suggestion
There are many factors affect timing belt selection. The below we have listed part of:
Operating Environment: PU toothed belt is recommended for high load, high precision and high speed application situation. Medium load, general transmission occasions can choose rubber timing belt, which is more cost-effective.
Working Environment: If used for chemical corrosion resistance, oil resistance environment, it is recommended to choose PU timing belt. General environment and no special chemical requirements select rubber synchronous belt.
Cost Budget: PU timing belt is relatively expensive, but have a long service life. Rubber timing belt price is more economical, suitable for general industrial fields.
Conclusion
Through the above comparison, it can be seen that the rubber and PU timing belt have their own advantages, and the choice of which belt should be comprehensively evaluated according to the specific application environment, performance requirements and cost considerations. In practical applications, the appropriate type of synchronous belt can be flexibly selected according to the specific situation to achieve the best transmission efficiency.
