tender for purchase of lab equipments = limited- 1. dc motor specification: type: dc shunt motor (dismantling model) power: minimum 0.5 hp voltage: 220 v dc speed: 1500 rpm • poles: 4 pole construction: laminated stator salient poles accessible armature features: cut section / open type suitable for dismantling and reassembly 2. hydraulic cylinder specification: bore diameter: 50 mm stroke length: 250 mm. working pressure: 160 bar cylinder tube: honed steel. piston rod: hard chrome plated seals: standard industrial seals. end caps: steel no 14000 supply: mounted on training base. suitable for dismantling and inspection 3. hydraulic operated directional control valves (dcv) specification: type: manual spool type dc valve size: ng06 (cetop 3) capacity: 20-40 lpm configuration: 4/2 way rated pressure: 210 bar flow body: hardened steel / cast steel spool: ground and hardened ports: clearly marked (p, a, b, t) supply: mounted on training plate. suitable for dismantling and study 4. bearing with shaft assembly specification: type: dismantling and assembly teaching unit. shaft diameter: 30 mm shaft material: en8 steel bearings: deep groove ball bearing (6205/6206) housing: cast iron. locking arrangement: circlips no 20000 lock nuts. end covers mounting: bench-mounted / frame mounted unit5. coupling unit using driving and driven shafts using plummer block bearing unit specification: 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 for manual lubrication practice.. the bearing type: self-aligning ball bearing (1200 series) or spherical roller bearing (22200 series). bore diameter: standard 25mm or 30 mm. shafting and coupling shaft material: ground carbon steel (ens 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). 6. (a).sliding mesh gear box for dismantling and assembling specification: (a) max transmitted power 1to1.5hp, torque capacity-40 to 200nm, number of speed 3 to 6, gear module 1.5 to 2, sliding mesh gearbox . gearbox type-sliding mesh forward gears- 3 reverse -yes gear material -alloy steel lubrication-splash /oil gear teeth- spur typical gear ratios-3.2:1/2.0:1 / no 15000 1.3:1 input speed-0-1800 rpm. housing material- cast iron (b).constant mesh gear box cut section specification