Conveyors are one of the most important pieces of equipment in modern industry. They move materials from one place to another — automatically, continuously, and at scale. Whether it’s raw ore leaving a mine, bottles moving down a food processing line, or packages sorted in an e-commerce warehouse, there’s a conveyor doing the heavy lifting.
But not all conveyors are the same. The type you choose depends on the material being moved, the environment it operates in, the distance it needs to travel, and the speed required. Picking the wrong type wastes money and creates bottlenecks. Picking the right one makes your whole operation run smoother.
This guide covers every major industrial conveyor type, how each one works, where it’s used, and how to choose between them.
Table of Contents
- Key Takeaways
- Belt Conveyors
- Chain Conveyors
- Vibration Conveyors
- Roller Conveyors
- Screw Conveyors
- Pneumatic Conveyors
- Overhead Conveyors
- How to Choose the Right Conveyor
- FAQs
Key Takeaways
- There are two broad categories: unit-handling conveyors (discrete items) and bulk-material conveyors (loose materials).
- Belt conveyors are the most versatile and widely used type across almost every industry.
- Chain and roller conveyors handle heavy loads that belts can’t support safely.
- Screw and pneumatic conveyors are built for powders, grains, and other fine bulk materials.
- Overhead conveyors free up floor space and are standard in automotive and garment manufacturing.
- Matching the conveyor to the material and environment is more important than choosing the cheapest option.
Belt Conveyors
The belt conveyor is the most widely recognised type of conveyor in the world. You’ve seen it at airport check-ins, supermarket checkouts, and mining sites. In industrial settings, it does far more heavy work than most people realise.
How Belt Conveyors Work
A belt conveyor uses an endless loop of material — the belt — that runs between two or more pulleys. The drive pulley at one end powers the movement. The belt rests on a series of idler rollers spaced evenly along the frame to support the load and prevent sagging.
The belt itself can be made from rubber, PVC, polyurethane, fabric, metal mesh, or even modular plastic links. The material choice depends entirely on what the belt needs to carry and the conditions it faces.
What Belt Conveyors Can Carry
Belt conveyors handle an enormous range of materials:
- Fine powders like cement, flour, and sugar
- Granular materials like sand, gravel, and grain
- Ore-sized boulders in mining operations
- Packaged goods, cartons, and tote bins in warehousing
- Food products on food-grade belts in processing plants
Real-World Applications
Mining: Belt conveyors move crushed ore and coal over distances of several kilometres between the extraction site and the processing plant. Some open-pit mining operations run conveyor systems more than 10 km long.
Food & Beverage: Stainless steel or food-grade PVC belts carry biscuits, vegetables, meat, and packaged goods through sorting, inspection, and packaging lines. The belt surface is easy to clean and can be sanitised between runs.
Airport Baggage Handling: Flat and curved belt conveyors move luggage from check-in to aircraft loading, routing bags through scanners and sorting systems automatically.
E-commerce Fulfilment: Giant warehouse operations like those run by major online retailers depend on belt conveyors to move tens of thousands of packages per hour through picking, packing, and dispatch.
Speed and Capacity
Belt speed can be set anywhere from under 0.1 m/s for delicate items up to 5+ m/s for bulk material applications. Capacity depends on belt width, speed, and the density of the material being carried.
Chain Conveyors
Where belts flex, chains are rigid and powerful. Chain conveyors use linked metal chains as the carrying element, making them ideal for heavy, hot, or sharp materials that would damage or wear out a rubber belt quickly.
The Five Main Types of Chain Conveyors
1. Apron (Slat) Conveyors: Metal plates or slats are attached to the chain to form a solid, flat carrying surface. These are used to move heavy, sharp, or abrasive materials — think cast metal parts coming off a foundry line, or rock from a quarry crusher.
2. Sliding Chain Conveyors: The product slides directly on flat-top chain links. Common in assembly lines where operators need to work on the product while it moves, such as in automotive engine assembly.
3. Heavyweight Plate Conveyors: Built for extreme loads, these use thick steel plates and heavy-duty chains. You’ll find them in steel mills and heavy manufacturing where loads can weigh several tonnes per metre.
4. Push Bar Conveyors: Horizontal bars attached to the chain push items along a flat bed. Used in situations where items need to be moved in a controlled, stop-start fashion — like moving containers between work stations.
5. Twin Chain Conveyors: Two parallel chains with cross-members or pallets between them carry large, heavy loads. Engine blocks, large appliances, and automotive body shells are all moved this way.
Where Chain Conveyors Are Used
- Automotive plants: Engine and body assembly lines
- Steel mills: Moving hot billets and heavy steel sections
- Foundries: Carrying sand moulds and hot castings
- Bottling plants: Moving heavy glass bottles through filling and labelling
Vibration Conveyors
Vibration conveyors move material in a very different way to belts and chains. Instead of pulling material along, they shake it. The trough or tube vibrates at a controlled frequency, causing loose material to “hop” forward in small, rapid increments.
How They Work
The conveyor trough is mounted on springs or rubber buffers and connected to an eccentric drive or electromagnetic vibrator. The vibration angle is tuned so that material moves forward on the upward stroke but doesn’t slide back on the return stroke.
Key Advantages
- No moving parts in contact with the material — low wear
- Self-cleaning — fine particles don’t get trapped
- Can screen and sort while conveying (with mesh troughs)
- Good for fragile items — the motion is gentle enough not to break brittle materials
Applications
Food processing: Moving nuts, seeds, small vegetables, and confectionery without damaging them. The vibrating motion can also be used to align or orient small parts.
Pharmaceuticals: Feeding tablets and capsules into packaging machines at precisely controlled rates.
Mining & Quarrying: Screening out fine material from crushed rock while simultaneously conveying the oversized material to the next processing stage.
Recycling: Separating mixed streams of material by vibrating them across screens with different mesh sizes.
Roller Conveyors
Roller conveyors replace a solid belt surface with a series of rotating rollers mounted in a frame. Items sit on top of the rollers and move forward either by gravity, by powered rollers, or by being pushed manually.
Gravity Roller Conveyors
These are the simplest and cheapest type. The frame is set at a slight downward angle so items roll from one end to the other under their own weight. You’ll see them in loading bays, warehouses, and despatch areas where boxes and cartons need to move short distances quickly and cheaply.
Powered Roller Conveyors
Each roller (or zones of rollers) is driven by a motor. This means the conveyor can be flat or even go slightly uphill. Powered rollers also allow “zero pressure accumulation” — rollers in a zone stop turning when a product in front hasn’t moved, preventing boxes from jamming into each other. This is critical in modern automated warehouses.
Best Uses for Roller Conveyors
- Warehouse order fulfilment and despatch
- Retail distribution centres
- Manufacturing assembly lines for rigid-bottomed products
- Airport baggage claim carousels
- Printing and packaging lines
Important note: Roller conveyors only work with items that have a firm, flat base. Bags, pouches, drums, and irregularly shaped items need a belt instead.
Screw Conveyors
A screw conveyor (also called an auger conveyor) looks exactly like a giant corkscrew inside a tube or trough. As the screw rotates, it pushes material forward along the length of the conveyor.
How They Work
The rotating helical screw is mounted inside a stationary housing. As the screw turns, the flights (the spiral blades) push material from the inlet end to the outlet. The pitch of the flights and the rotation speed control how fast material moves.
What They’re Used For
Screw conveyors excel at moving bulk powders, granules, and semi-liquid materials that don’t flow well on belts:
- Agriculture: Grain augers move harvested grain from combine harvesters into storage silos or trucks
- Food processing: Moving flour, sugar, salt, and other dry ingredients between hoppers and mixing systems
- Wastewater treatment: Moving screenings, sludge, and biosolids through processing stages
- Plastics & chemicals: Feeding plastic pellets or chemical powders into processing machinery at controlled rates
- Concrete & construction: Moving dry cement powder from silos to mixing stations
Advantages and Limitations
Screw conveyors are compact, enclosed (preventing dust escape), and able to work at any angle including vertically. Their main limitation is gentle handling — the rotating screw can break up fragile granules or degrade certain food products if not carefully sized.
Pneumatic Conveyors
Pneumatic conveyors move material through pipelines using air pressure or vacuum. There are no moving mechanical parts in the pipeline itself — just the material and air.
Pressure vs. Vacuum Systems
Pressure systems push material through the pipeline from a single pickup point to one or more delivery points. These are used when material needs to be distributed across a large area.
Vacuum systems pull material through the pipeline. They’re ideal for collecting material from multiple pickup points into a single central destination — for example, gathering flour from multiple storage silos into a central blending system.
Dense Phase vs. Dilute Phase
Dilute phase systems move material at high velocity in a continuous stream. The material is fully suspended in the airstream. Good for light, non-fragile materials.
Dense phase systems move material in slugs or plugs at low velocity. Much gentler on fragile materials like pharmaceutical tablets or fragile food products. Also better for abrasive materials because the slower speed reduces pipe wear.
Industries That Rely on Pneumatic Conveyors
- Flour milling: Transferring flour between silos, bins, and packaging machines
- Pharmaceuticals: Moving powders and granules in fully enclosed, hygienic systems
- Plastics: Feeding plastic resin pellets from bulk storage to moulding machines
- Power generation: Removing fly ash from coal-fired power plant filters
- Cement manufacturing: Moving cement powder over long distances within a plant
Overhead Conveyors
Overhead conveyors mount the conveyor track above the factory floor, suspending products from hooks, carriers, or trolleys that travel along the track. The floor below stays clear, which is a huge advantage in cramped production environments.
Power & Free Systems
Modern overhead systems are usually “power and free” — meaning the carriers are not permanently coupled to the drive chain. Carriers can be stopped, diverted, queued, or re-routed independently without stopping the whole line. This gives extraordinary flexibility for complex production routing.
Where Overhead Conveyors Excel
Automotive manufacturing: Car bodies and frames are suspended from overhead conveyors as they move through welding, painting, and final assembly. The overhead positioning lets workers access all sides of the vehicle easily.
Paint finishing: Parts are hung on hooks and pass through pre-treatment, painting, and curing ovens in a continuous loop. The overhead path optimises floor space and prevents contamination of painted surfaces.
Garment and dry cleaning: Clothing on hangers moves through cleaning, pressing, and storage systems on overhead rail conveyors.
Meat processing: Animal carcasses are hung and conveyed through chilling, cutting, and packaging operations.
How to Choose the Right Conveyor Type
There is no single best conveyor. The right choice depends on five key factors:
1. What Are You Moving?
Is it a unit load (boxes, parts, pallets) or bulk material (powder, grain, rock)? Is it wet, hot, sticky, fragile, abrasive, or food-grade? Each characteristic narrows the field quickly. A hot, abrasive material will destroy a rubber belt but work fine on a steel apron conveyor.
2. How Far Does It Need to Travel?
Belt conveyors can run for kilometres. Screw conveyors are better for short distances. Pneumatic conveyors can travel long distances through complex building layouts without needing structural supports.
3. What’s the Environment?
Outdoor, wet, dusty, or extreme-temperature environments all demand specific conveyor types and materials. A food processing plant needs food-grade, washdown-rated equipment. A foundry needs heat-resistant steel conveyors.
4. What Throughput Do You Need?
Tonnes per hour, units per minute, or litres per hour? Each conveyor type has a throughput range it handles efficiently. Oversizing wastes capital. Undersizing creates bottlenecks.
5. What Floor Space Is Available?
Limited floor space pushes you toward overhead conveyors or vertical screw conveyors. Open floor plans give more flexibility for belt and roller systems.
Quick Reference: Conveyor Type Selector
- Fine powder or grain: Screw conveyor or pneumatic conveyor
- Heavy, hot, or abrasive bulk material: Apron/slat chain conveyor or heavy-duty belt
- Boxes and cartons in a warehouse: Roller conveyor (powered) or belt conveyor
- Assembly line with heavy parts: Chain or twin-chain conveyor
- Fragile granules or tablets: Vibration conveyor or dense-phase pneumatic
- Hanging products or floor space is limited: Overhead conveyor
- General-purpose bulk or unit handling: Belt conveyor
FAQs About Industrial Conveyors
What is the most common type of industrial conveyor?
The belt conveyor is the most common type worldwide. Its versatility — handling everything from fine powders to large boulders, across a huge range of industries — makes it the default choice when another type doesn’t offer a clear advantage.
Can conveyors handle food products safely?
Yes. Food-grade conveyors use belts and components made from materials approved for contact with food. Stainless steel frames, FDA-approved belts, and easy-to-clean designs are standard in food processing plants. Vibration conveyors and pneumatic systems are also widely used for moving delicate food items or dry ingredients hygienically.
What’s the difference between a belt conveyor and a roller conveyor?
A belt conveyor uses a continuous moving belt to carry any item. A roller conveyor uses rotating rollers and only works with items that have a flat, rigid base. Roller conveyors are cheaper for warehouse use, but a belt is needed for bags, irregular shapes, or any item that can’t roll cleanly.
How long do industrial conveyors last?
Well-maintained industrial conveyors typically last 10–20 years or more. Belts are the most frequently replaced component — a rubber belt in a harsh environment might need replacing every 1–3 years, while chain components in a well-lubricated system can last far longer.
Are conveyors suitable for outdoor use?
Many conveyors are specifically designed for outdoor use — mining belt conveyors, port ship-loaders, and quarry systems all operate outdoors year-round. Outdoor conveyors use weather-resistant belts, sealed bearings, and corrosion-proof frames.
