2 Nos – 100 dia shaft 1200 long resting on Spherical roller bearing 4 Nos. with swivel base rotating on taper roller bearing 300 dia SKF 2 Nos. The over all dimensions 1340 * 1050 * 1200 with friction, drive, speed, adjust the collapsible arms moving on 32 Nos of SKF 6204 bearings, with 1200 mm back support plate.