Roller Conveyor — The Complete 2026 Guide
Gravity vs powered, 24V MDR, sizing rules, accumulation, integration with WMS/WCS.
The roller conveyor is the workhorse of every modern distribution center. This guide consolidates everything we cover across the Conveyor-Design knowledge hub: what roller conveyors are, when each variant wins, how to size them, and how they integrate with the rest of an automated facility. It is written for engineers, ops managers and consultants specifying systems in Belgium, the Netherlands, Luxembourg and the wider European market.
1. What is a roller conveyor?
A roller conveyor uses a series of parallel rotating rollers mounted in a frame to move cartons, totes, trays or pallets. Variants split along two axes: drive (gravity, belt-driven, chain-driven, 24 V MDR) and load class (light carton, medium tote, heavy pallet).
2. The five variants you actually choose between
| Variant | Typical load | Throughput | Indicative cost (€/m) | Best for |
|---|---|---|---|---|
| Gravity roller | 1–35 kg cartons | Manual | 120–250 | Docks, returns, short manual lines |
| Belt-driven roller | 5–50 kg | Up to ~3 000 cph | 450–700 | Long straight runs, heavy cartons |
| Chain-driven roller | 50–1 500 kg pallets | Up to 600 pallets/h | 800–1 400 | Pallet transport, AS/RS infeed |
| 24V MDR (motorized) | 1–50 kg totes/cartons | 2 000–4 500 cph | 500–900 | Automated DCs, e-commerce |
| Lineshaft | 10–35 kg | Up to ~2 000 cph | 350–550 | Legacy refurb, low capex |
For new European projects in 2026, 24V MDR is the default for case and tote handling; chain-driven remains the default for pallets.
3. Sizing rules you can apply on a napkin
- Three rollers under the smallest load at all times — set roller pitch from the smallest carton, not the average.
- Frame width = load width + 50–100 mm clearance.
- Roller diameter: 40 mm for ≤15 kg, 50 mm for 15–35 kg, 60 mm and up for heavier loads.
- Accumulation length ≥ 1.5× the longest expected upstream stoppage at design throughput.
- Inclines: gravity ≤ 4°, powered roller ≤ 5–7° with high-friction rings; above that switch to belt.
4. Integration with WMS and WCS
A modern roller conveyor is a software product as much as a mechanical one. The WCS (Warehouse Control System) drives zone logic, accumulation and merge priority in real time; the WMS issues higher-order tasks (allocate, release, pick wave). Critical integration patterns:
- Zone-level telegrams to/from the WCS (load arrived, zone clear, error code).
- Photo-eye + scanner pairs at decision points feed sortation logic.
- OPC-UA or MQTT for plant-level dashboards and predictive maintenance.
5. Energy, noise and OPEX
24 V MDR with zero-pressure accumulation consumes 30–50% less energy than always-on 400 V belt-driven lines, because motors stop when no load is present. Noise drops from ~75 dB(A) to ~62 dB(A) — material in pharma and food environments where SLA noise limits apply.
6. When NOT to use a roller conveyor
- Small, light or fragile items (jewellery, electronics blisters) — use belt or modular plastic.
- Wet or sticky environments — modular plastic belts wash down better.
- Variable-shape items that won't track straight — use belt or AMRs.
- Inclines > 7° — use belt with cleats or spiral conveyors.
7. Specifying a project end to end
The teams that get it right work with an engineering partner from day one — modeling flow with simulation, balancing investment against uptime, and integrating the conveyor with the wider operation. Easy Systems, part of BOA Concept, designs and installs roller conveyor systems across the Benelux every week.
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Planning a new conveyor or automation project?
Easy Systems designs and installs internal transport, conveyor and warehouse automation systems across the Benelux. Tell them about your flow — they'll come back with a system that scales.