How to select the pitch for plastic modular conveyor belts?

The pitch of a plastic chain plate refers to the distance between the centers of two adjacent holes on the plate. This parameter directly affects the plate's dimensions, load-bearing capacity, and structural compactness. The selection of plastic chain plate pitch is typically determined based on specific application requirements. Common pitches include 15.2mm, 15.24mm, 25.4mm, 27.2mm, 31.75mm, 38.1mm, 50.8mm, and 63.5mm, with 38.1mm and 50.8mm being the most prevalent. Pitch selection must also account for the chain's transmission ratio, load capacity, operating speed, and available installation space. Determining the pitch is a critical step in designing chain drive systems, as it directly impacts the chain's strength, wear resistance, and service life. The selection of pitch for plastic chain plates should comprehensively consider the application environment, load conditions, and expected lifespan to ensure efficient and reliable system operation.

Considerations When Selecting Plastic Chain Plates

I. Impact of Material Selection on Load Capacity

The material of plastic chain plate modules is a key factor determining the load-bearing capacity of conveyor belts. Unlike traditional metal chain plates, plastic chain plates offer advantages such as lightweight construction, corrosion resistance, and ease of maintenance. However, they also present challenges due to lower strength. Therefore, when selecting plastic chain plate materials, it is essential to comprehensively evaluate factors including strength, wear resistance, and temperature tolerance. This ensures the equipment meets load requirements while extending its service life. Generally, POM (Acetal) offers the highest strength, followed by PP (Polypropylene), and then PE (Polyethylene).

II. Impact of Operating Environment on Load Capacity

The load capacity of plastic chain plate modular conveyor belts is also influenced by the operating environment. For instance, in humid or highly corrosive conditions, the corrosion resistance of plastic chain plates is put to the test. Improper material selection may lead to premature aging and damage of the chain plates, thereby compromising load capacity. Additionally, factors such as ambient temperature and vibration within the operating environment may affect both the operational stability and load capacity of plastic chain plate modular conveyor belts.

Summary

Corrosion Resistance Material Selection: PE > PP > POM

Light Load High-Speed Applications (e.g., food/beverage conveying): Recommended pitch sizes of 15.2mm, 12.7mm, 19.05mm, or 25.4mm reduce vibration and noise while enhancing operational smoothness.

Heavy-Duty High-Load Applications: Select pitches ≥50.8mm and pair with high-rigidity chain plates to prevent deformation.

Long-term temperature resistance: 100–150°C. Suitable for medium-to-high temperature applications. Pitch can be extended to 50.8mm (e.g., OPB series). PA material is an option.

For corrosion-resistant applications, select 316L stainless steel chain plates.（For example, the 802 812 881 series flat-top chain plates）

Suggestions for Sprockets

Sprocket Matching: Pitch must align with sprocket tooth count to prevent skipping or excessive wear.

Center Distance Setting: Recommended at 30–50 times the pitch. Too small may cause chain stalling; too large increases vibration.

Custom Requirements: Non-standard pitches (e.g., 50.8mm) require reinforced sleeve structures and sufficient clearance between sprocket teeth.

Please contact us direct for more information regarding your specific requirements.

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