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Choosing the right conveyor roller is critical for ensuring smooth material flow, longer service life, and reduced maintenance.

This guide explains how to select the correct roller diameter, shaft size, spacing, and type based on your application.

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Key Factors for Conveyor Roller Selection

1. Load per Roller

The first step is to determine how much load each roller will carry.

Rule of thumb:
At least 3 rollers should support the load at any time.

Example:
If load = 900 kg → Load per roller ≈ 300 kg

👉 Refer: Conveyor Roller Load Capacity Chart

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2. Roller diameter selection

Below are general load capacities for your ready reference, when there no metal in contact with rollers. These are very general recommendations and need careful selection based on other factors.  Roller Capacity changes based on the roller length so a detailed chart for the load capacity is in next section ​

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Load per Roller            Recommended Roller Diameter

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Upto 30 Kgs                     Dia 38

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Upto 60 Kgs                     Dia 51

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Upto 150Kgs                    Dia 60

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Upto 300 Kgs                   Dia 76

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Upto 500Kgs                    Dia 89

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3. Roller Length

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Longer rollers have lower load capacity due to bending.

Guideline:

• Up to 600 mm → standard load capacity

• 800–1200 mm → reduce load rating

• Above 1200 mm → use higher diameter roller

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