Product description Specifications Product description Rotary Brush RKD-21 is used for final treatment of the surface of the wire with a diameter of 6.5 ° 22 mm before its entry into the drawing machine JDH 200 after the it was odlámány scales in quarry LOR 22nd. Specifications diameter wire and tube 5 - 30 mm max. speed 2,2 m/s