| Trolley |
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Trolley Type Operators feature the motor unit mounted between, above and to the rear of the “L-rail” horizontal tracks. The trolley drive provides continuous contact with the door and is recommended for application wherever possible. This is the only operator suitable for low headroom applications. Multiple trolleys can be used for wider doors. |
| Jackshaft |
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Jackshaft or Side-Mounted/Center-Mounted operators feature the motor unit mounted on the inside front wall (side-mount) or in line (additional headroom is required for center-mounting) and connected to the torsion shaft with adjustable couplers or drive chain and sprockets. |