Gear motor with vertical slow speed shaft with waterproofing ensured on the PV output through an internal skirt.

Range of devices with torque ranging from 20 000 Nm to 1 000 000 Nm and more.

Extremely high reduction ratio
i = 10000/1, … 30000/1,… etc.

Output rotation speed 0.1 rpm

The slow speed grooved shaft slides in the PV shaft of the reduction gear in order to adjust the height of the scraper in terms of the bottom of the tank and the product.

Electronic torque control ensures the following functions :

• Permanent display of tractive force,
• 4 threshold relay outputs,
• 4-20 mA output for connection to a controller.

The position of the slow speed shaft is servo-assisted with a motorised actuator for lifting with an axial capacity of 5 to 100 tons, fitted with electrical and mechanical end of travel sensors and a system for viewing the position of the scraper in terms of the bottom of the tank.