Edge Roller Conveyors (ERT250)


Update: CAD models of the Edge Roller Technology (ERT250) conveyor are now available in D-Tools, Dorner’s online conveyor configurator.


Downloading CAD models on D-Tools gives product engineers, plant managers, and others the ability to easily design an ERT250 conveyor to fit their exact application in a matter of minutes. D-Tools, which includes 2D and 3D CAD libraries and other functions, allows users to construct simple or complex conveyor packages, as well as individual components such as gear motors and mounting packages, support stands, and accessories. To access Dorner’s D-Tools, visit https://www.dornerconveyors.com/.

Edge Roller Technology (ERT250) conveyor has received certification for use in ISO Standard 14644-1 Class 4 rated cleanrooms. This means Dorner’s ERT250 will conform and not contribute to the contamination of cleanrooms to those standards.


Cleanrooms and other controlled environments provide management of airborne particulate contamination to appropriate levels for accomplishing contamination-sensitive activities. Industries that regularly use cleanrooms in their manufacturing processes include pharmaceuticals, medical devices, healthcare, assembly, and packaging.


The ERT250 is ideally suited to operate in cleanroom environments requiring a pallet handling conveyor capable of zoning for accumulation and automation assembly applications. The ERT250 nicely complements cleanroom applications as it uses rollers, not belts which can result in releasing dust into the air, to move pallets smoothly with no friction. The rollers are driven by a patent-pending, energy-efficient linear gearbox that gives customers added flexibility with motor positioning and zoning. This allows for zone and slip roller operation which doesn’t release dirty particulates into the air like pneumatically-operated conveyor systems. 


The conveyor’s open-center design eliminates concerns of small parts or screws dropping into rollers and causing conveyor damage or jamming. The ERT250 is ideal for applications calling for pallet or tray handling; no and low-back pressure accumulation; and medium to heavy load assembly automation.


The non-contact zone control provides simplified traffic control that eliminates pallet stops and costly pneumatic valves. Conversely, slip rollers can be used for full length runs with conventional pneumatic pallet stops. The rollers are easily accessible and can be replaced quickly without affecting the remaining portion of the conveyor.


  • Widths 120 to 960-mm wide
  • 38-mm diameter rollers on 50-mm centers
  • Loads up to 250 lb. per pallet or tray
  • Loads up to 15 lb. per roller
  • 150-mm minimum long tray
  • Speeds up to 30 m (100 ft) per minute
  • Aluminum frame with two T-slots
  • Energy-efficient brushless DC gear motors and controllers; motor controllers use Ethernet IP for easy communication
  • Reversible
  • Automation modules
    • Navigate 90 and 180-deg. corners
    • Lift and transfer
    • Lift and locate
    • 90-deg. pusher
  • Three transportation modes
    • Non-contact accumulation
    • No or low-back pressure slip roller accumulation
    • General transport
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