Poor roller selection often results in one of two outcomes: premature failure or overspending. Under-engineered rollers wear out early, disrupt operations, and increase maintenance. Over-engineered rollers may perform well but cost more and introduce unnecessary complexity.
The right Interroll roller strikes a balance among performance, environmental impact, and system requirements. It accounts for real operating conditions rather than ideal assumptions. This guide outlines how to specify efficiently and accurately, helping designers avoid common pitfalls that lead to downtime, excess cost, and long-term maintenance challenges.
- Start With Actual Load Per Roller
Many selection errors begin with system-level load assumptions. Roller ratings are based on individual loading, not total system weight.
For example:
- A 50 lb carton typically sits on three rollers = ~17 lb per roller.
- Real-world impacts (e.g., drops, shifts) create uneven forces.
Add a reasonable safety margin to account for these factors. Consider the heaviest item and worst-case orientation when calculating loads. Interroll’s roller platforms are defined largely by bearing and material selection; both are key to durability under load and overall system reliability.
- Select the Platform Based on Environment
Interroll’s roller platforms are optimized for specific conditions:
- Platform 1100: Basic gravity use, clean ambient environments.
- Platform 1200: Extended temperature range, antistatic properties.
- Platform 1700: Heavier loads, better sealing for dust and moisture.
Avoid defaulting to the most rugged option. Choose based on the actual conditions—temperature, exposure, and application. For instance, areas with high humidity or chemical exposure may require sealed bearings or corrosion-resistant finishes even if the load is light. A clean pack area doesn’t require washdown-rated rollers, but a food or pharma zone might.
- Use Temperature and Exposure as a Gate
Temperature and environmental contamination are often the driving factors in roller failure.
Important considerations:
- UV exposure degrades polyurethane.
- Wet or oily environments reduce friction drive effectiveness.
- Cold environments require specific lubrication strategies.
- Dust, debris, and corrosive agents accelerate wear.
If using friction drives (e.g., O-rings), ensure they’re suitable for site conditions. Proper material selection protects performance and extends life, especially in areas with seasonal temperature swings, washdown routines, or frequent product spills that increase exposure risk.
- Choose the Right Series by Application
Interroll offers several roller series tailored to different use cases:
- Series 1700: General-purpose, for universal conveying. Max load: ~450 lbf; speed: up to 2.0 m/s; tube options include steel, stainless, aluminum, and PVC.
Note: PVC may deform under high temperature and continuous load. - Series 3500: Driven systems (belt/chain). Chain-driven speed caps at 0.5 m/s. Oiled bearings are recommended for low-temperature use.
- Series 1200: Broad temperature tolerance (−28°C to +80°C). Suitable for freezer zones and high-temperature environments.
Choose based on transport mode (gravity vs driven), environment, and required speed/load performance.
- Define Diameter and Shaft Requirements
Even properly spec’d rollers fail if they don’t fit your layout. Common issues include:
- Shaft styles that mismatch mounting hardware.
- Frame width errors.
- Interference from guards or supports.
- Inaccessible roller locations.
Standardize shaft types and dimensions wherever possible to simplify spares and reduce installation time.
- Confirm Speed, Uptime, and Maintainability
A roller is only “right” if it also supports uptime and operational goals.
Key factors:
- Speed impacts wear and noise.
- Faster speeds require better dynamic performance and alignment.
- Inaccessible rollers increase maintenance delays.
Prioritize easy-to-reach locations and standardized components. Complex or unique roller setups lead to longer downtimes and inconsistent replacements.
- Use a Structured Specification Template
Capture these details when finalizing your roller spec:
- Unit load type (carton, tote, pallet) and bottom surface
- Max and average weight
- Typical number of rollers under load
- Speed requirements (transport, accumulation)
- Temperature exposure and location
- Contamination risk (wet, oily, dusty)
- Tube material (steel, aluminum, PVC)
- Diameter, pitch, shaft style, and mounting
- Drive type (gravity, belt, PolyVee, chain)
- Noise level needs (standard vs low-noise areas)
- Spare parts strategy (standardized SKUs)
Specify for Conditions, Not the Catalog
The right Interroll roller supports your actual load, layout, and maintenance needs—nothing more, nothing less. By designing for your operating environment and scaling requirements, you avoid underperformance, overspending, and unnecessary complexity.
This approach also simplifies maintenance planning, reduces spare part variation, and improves long-term uptime. That’s how you build a conveyor system that lasts without overengineering it or creating avoidable operational risk.
