Asynchronous single or three-phase with 2 or 4 poles, totally enclosed with external ventilation. Thermal safety feature (single-phase model). Class F winding in accordance with VDE 0530. IP 65 protection in accordance with DIN 40050.With die-cast aluminium casing. Wheelbase 32 mm. Wheel rim in special bronze 120-160 HB hardness. Worm gear in hardened steel with grinding thread rotating on ball and roller bearings. Lubrication with special long-lasting oil. Sealing rings made in special rubber for high temperatures. 9 gear ratios (i) available, from 7 to 100. Rated torque 20 Nm. Version B3 or
B5. B5/S left version - B5/D right version.