... bladed poled die-cast aluminum impeller, sizes from 200 to 810mm, available in 50/60Hz, air volume ... type shaft bearings are hermetically sealed, pre-greased and self-aligning. Under, normal duties, these bearings ... mouth, high flexibility by variation of blade angle and speed of motor, available in both air row ... air conditioning, heating technology, drying, cooling, agriculture. Axial fan with frame