The ETR251/46 equipment rack drive is a low-maintenance, purpose-designed drive for opening and closing swinging-environment vents in Venlo-type greenhouses. The combination of TR251/46 gear rack drive and aEP RW engine gearbox contributes to an optimum greenhouse weather thanks to accurate positioning of the air flow vents.

The self-supporting TR251/46 equipment rack drive comprises a zinc-plated C-profile with an integral compact equipment rack drive unit. The TR251/46 equipment rack drive is installed to a greenhouse gutter using the item clamp-mounting forks or bows.

Thanks to the apparatus reduction stage (i-2.76) and the pinion of the TR251/46 gear rack drive, the drive torque is effectively converted into a maximum rack force of 4200 N. Track rollers in the C-profile and guidebook blocks ensure stable expansion and retraction of the rack. The drive shafts of the TR251/46 gear rack drive have long, flat-sided journals. This makes it possible to match drive shafts (prefab) fitted with weld/sleeve couplings or chain couplings, once the house units have been installed. The drive shafts are planetary gearbox locked in the couplings by the accompanying shaft retaining clips. The TR251/46 gear rack drive is easy to maintain.

A ETR251/46 gear rack drive with other C-profile lengths and rack lengths is available on request.