The ETR251/46 gear rack drive is a low-maintenance, purpose-designed drive for starting and closing swinging-atmosphere vents in Venlo-type greenhouses. The mixture of TR251/46 gear rack drive and aEP RW motor gearbox plays a part in an optimum greenhouse environment because of accurate positioning of the air vents.

The self-supporting TR251/46 gear rack drive planetary gearbox comprises a zinc-plated C-profile with an integral compact equipment rack drive unit. The TR251/46 gear rack drive is installed to a greenhouse gutter using the accessory clamp-installation 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 extension and retraction of the rack. The drive shafts of the TR251/46 gear rack drive have long, flat-sided journals. This can help you fit drive shafts (prefab) fitted with weld/sleeve couplings or chain couplings, once the house units have been installed. The drive shafts are locked in the couplings by the accompanying shaft retaining clips. The TR251/46 gear rack drive is simple to maintain.

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