tender for supply of maintenance, repair and service lab equipment for mechanical department , item name , bearing with shaft assembly • type: dismantiling and assembly teaching unit • shaft diameter:30mm • \shaft material:en8steel • bearings: deepgroove ball bearing (6205/6206) • housing:castiron • locking arrangement: • circlips • lock nuts • end covers mounting: • bench-mounted/frame-mounted unit , coupling unit using driving and driven shafts using plummer block bearing unit • the plummer block housing material: cast iron (grade fg 200 or equivalent). type: sng or snl series (split-type housing). sealing: felt seals or v-ring seals (to demonstrate lubrication retention) lubrication: provided with a grease nipple at the top center form annual lubrication practice. • the bearingthpe: self-aligning ball bearing (1200 series) or spherical roller bearing (22200 series). bore diameter: standard 25mm or 30mm • shafting and coupling shaft material: grpimd carbon steel (en8 or en9) for high surface finish. • coupling type: flexible coupling: to demonstrate the bearings ability to handle slight misalignment. • rigid flange coupling: to demonstrate traditional direct connection driving/driven setup: one shaft connected to a small electric motor(driving) and the other to a brake drum or load(driven).