The treadmill belt is a crucial component of the treadmill, providing the surface for friction and relative movement that supports the user during their workout. A suitable treadmill belt ensures the stable operation of the machine and offers a comfortable running experience.

1. Common Treadmill Belt Issues

Consumer feedback, especially from markets where treadmills are frequently used, often highlights issues related to treadmill belts. Many users find themselves unable to resolve these issues without professional assistance. Common problems include:

• Wear and Tear: The inner side of the treadmill belt, especially the area in contact with the runner’s feet, tends to wear out first, potentially leading to the belt’s breakage.
• Noise: Poor seam handling can cause the belt to hit the rollers, resulting in a "thudding" sound.
• Slipping: Heavier users or those who suddenly step on the belt may experience slipping, usually due to insufficient belt tension or excessive lubrication.
• Misalignment: The belt may tilt to one side, rubbing against the edge or causing a serpentine motion.
• Wrinkling: Some users report that the belt wrinkles over time, making it unusable.
• Static Electricity: Poor anti-static properties can cause the buildup of static electricity, potentially damaging the treadmill’s controller and circuit board.

2. Treadmill Belt Composition

Different types of treadmills use varying belt structures. Home treadmill belts typically range from 1.4mm to 2.0mm in thickness and use either a single-layer or double-layer fabric with PVC or PU coating. Light commercial and commercial treadmill belts are thicker, usually between 2.0mm and 4.5mm.

Production processes for treadmill belts include:

• Lamination: Bonding the belt fabric with PVC at 120 degrees. Advantages include low production cost and high efficiency but may result in weaker peel strength and potential delamination over time.
• Coating: Applying PVC resin at 180 degrees to the belt fabric. This method offers better peel strength but lower production efficiency and potential cracking over time.
• Calendering: Extruding PVC resin through rollers at 180 degrees to bond with the fabric. This method provides the best peel strength and product lifespan but involves higher production costs.

3. Selecting a Treadmill Belt

Key factors to consider include:

• Dimensions: The belt's length and width should match the treadmill’s specifications. Home treadmill belts are generally 1.4mm to 1.8mm thick, while commercial belts are thicker (2-3mm).
• Surface Texture: Options include grass, diamond, golf, tire, and CS patterns. These textures affect friction and cleaning ease.
• Compatibility with Rollers: Thicker belts should be paired with larger rollers to ensure smooth operation and longevity.

4. Performance Metrics

• Stretch Rate: Evaluated through static pressure tests or by comparing the belt length before and after use.
• Tensile Strength: Different belt thicknesses have specific tensile strength requirements, e.g., 1.4mm belts should withstand at least 180kgf.
• Static Resistance: Measured by the resistance value between two points on the belt. The goal is to minimize static buildup to protect electronic components.

5. Adjusting and Oiling the Belt

Proper maintenance includes adjusting the belt’s alignment and tension and applying silicone oil for lubrication. Newer models may feature automatic oiling systems to simplify this process. However, excessive lubrication can cause slipping, so it’s important to use the correct amount.

6. Future Trends

Future developments in treadmill belts may include:

• Improved Seaming Techniques: For a smoother, more aesthetically pleasing finish.
• Softer, More Elastic Surfaces: To enhance cushioning and comfort.
• Maintenance-Free Belts: To eliminate the need for regular lubrication.
• PU Belts for Commercial Use: Offering greater durability, better elasticity, and environmental benefits.