What is a roller conveyor?
A roller conveyor is a unit-handling conveyor with a bed of parallel rollers mounted in a frame. Loads move across the rollers by gravity, manual force, or a powered drive. Gravity roller conveyors do not power the rollers, while live roller conveyors use a drive system to move products at a controlled rate.
A brief overview:
- Gravity roller conveyors move suitable unit loads by slope or manual force, without a powered drive acting on the rollers.
- Live roller conveyors use powered rollers or drive arrangements to provide controlled mechanical movement where gravity flow is not suitable.
- Roller selection depends on load base, weight, spacing, speed, and environment; some driven designs are better suited to heavy loads or contamination.
- Roller conveyors can support warehousing and end-of-line packaging and can be integrated into wider labelling and product-handling systems.
Gravity and live-roller conveyor types
Within wider product handling systems, roller conveyors are commonly grouped by how movement is created. Non-powered gravity rollers rely on slope or manual force, while live-roller systems use a powered drive to move and control unit loads. The choice changes the amount of control, the loads the conveyor can handle, and the way it fits into the wider line.
Gravity-roller conveyors
In a gravity-roller conveyor, freely rotating rollers support the load. A slight decline can use gravity to move the load, or an operator can push it along a level section. This makes gravity rollers useful where powered movement is not required, such as straightforward transfer or staging between processes.
Live-roller conveyors
Live-roller conveyors power the rollers through a drive arrangement. Live-roller conveyors include belt-driven, chain-driven, lineshaft-driven, and motor-driven types, alongside non-powered roller conveyors. Each powered type has its own application and engineering considerations.
Roller conveyor design and selection considerations
Roller conveyor selection starts with the load and the required movement, rather than a generic conveyor checklist. The roller bed must suit the unit load, and the drive type must suit the weight, speed, spacing, and operating environment.
Wider line requirements such as hygiene, footprint, guarding, sensors, rejection, and integration then shape the complete conveyor system.
Product stability, hygiene and footprint
Load contact with the rollers is an important distinction. Chain-driven live-roller conveyors are suited to loads with a flat, smooth, and firm bottom riding surface. This type can also suit heavy or bulky loads and applications where heat, dirt, oil, water, or other contaminants are present.
Roller conveyors can support warehousing and end-of-line packaging, while flat belt conveyors are used for general transport and labelling lines, and modular plastic belts for wet or washdown environments. Product base, handling task, hygiene requirements, and available floor space should therefore be considered together rather than treating every conveyor type as interchangeable.
Speed, guarding, and controls
Powered movement becomes more relevant when a line needs controlled transport rather than gravity or manual transfer. Conveyor width, speed, unit-load spacing, load size, and weight are key selection inputs for belt-driven live-roller conveyors.
Guarding and controls belong to the wider machine design and should be specified around the complete line rather than assumed from the roller type alone.
Sensors, rejection, and adjacent-equipment integration
The rollers provide the conveying surface; identification systems, inspection, rejection, and labelling remain separate functions in the wider system. Wider product-handling systems can combine conveyors with spacing and gapping, orientation and stabilisation, verification and vision, reject or divert equipment, and controls integration.
Where automated code reading is required, fixed-mount barcode scanners can be integrated as a separate line function around the conveyor.
Where these functions are needed, they should be designed as line elements around the conveyor rather than described as functions of the roller conveyor itself.
Roller conveyors and belt conveyors
A roller conveyor supports the load at multiple contact points across rotating rollers. A belt conveyor carries the load on a continuous moving surface.
That difference matters when evaluating the product base, transfer points, and whether the application is better suited to roller handling or continuous support. Roller conveyors can support warehousing and end-of-line packaging, while flat belt conveyors can support general transport and product presentation within automated labelling systems.
Engineering guidance for roller conveyors
Engineering and application guidance is available for non-powered, belt-driven, chain-driven, lineshaft-driven and motor-driven roller conveyors, reflecting the different design considerations for each type.
ALS Identify conveyor systems for roller conveyor applications
ALS Identify designs and builds roller conveyors as part of custom conveyor systems for warehousing and end-of-line packaging. Where the wider line requires more than transport, ALS can integrate conveyors with product handling, print-and-apply labelling, scanners, vision systems and reject equipment.
Discuss your product, line layout and handling requirements with the ALS Identify team.
