Military Engineer Services Tender

Design, supply installation testing and commissioning of electrically operated indoor overhead travelling EOT crane conforming to IS-3177 (latest revision) suitable for operation on 415 volts 3 Phase 4 wire 50 HZ supply mounted on existing double girder with necessary steel supporting structures with hoisting cross travel (CT) and long travel (LT with micro drives through clutch and geared motor of suitable capacities with control panel power and controlling cables power and controlling cables confirming to relevant IS controlled by pendent push button station of operation with and including the following:- (a) Capacity – 2 ton (b) Class of duty - M5 as per IS -3177. (c) Lift of hoist-3 M approx. (d) Crane control operation hanging pendent and radio remote operation. SPEED (a) Main Hoist - 3 meter per minute (b) Cress Travel - 8 meter per minute (c) Long Travel - 12 meter per minute (d) Creep speed or main hoist - 10% of normal Speed (e) Speed control - for all motions speed range of 10% to 100% of rated speed through variable speed drive control from pendant push button.

item No1 Cont.. Motors (a) Motor rating shall be computed as per IS-3177 Motors shall be squirrel cage induction type, heavy duty. Reversible, crane duty type with 40% CDF Class H insulation with temperature rise limited to class B. It should have TEFC enclosure, IP-55 ingress protection. It shall be designed for speed control of 10% to 100% with variable speed drive. (b) Hoisting Mechanism, with specially designed crab unit for double girder, engineered for smooth jerk free and soft start, lifting of loads. Hoist drive with micro drive through clutch and geared motor selected according to the class of duty, driving the rope drum, through helical gear box. The rope drum shall be made out of seamless pipes fabricated from plates tested as per ASTM/IS standards. (c) Gear Boxes with stress relieved, machied, lapped and hardened helical gears, oil lubricated, manufactured using the modern gear cutting machines, duly heat treated to withstand the stringent load conditions and selected according to class of duty commensurate with type of application. (d) End carriages with standard wheel bases fabricated using the modern welding and machining techniques to ensure jerk free and smooth travel motion. The wheels shall be double flanged, supported on self-aligning anti-friction bearings, Buffers shall be provided at the ends of the carriage as per IS Standards. (e) Brakes for all drives shall be self-aligning type, Electro-magnetic shoe / disc brakes type to hold the mechanism in position instantaneously as soon as the power supply is 'OFF' either accidentally or (f) Intentionally for all motions. Shunt brakes (g) Lifting Hook: Drop Forged with latch, Plain 'C' type, Swiveling on Thrust Bearing, Duly tested as per IS : 15560 (latest version)

item No1 Cont.. Rope Drum Shall be of fabricated type stress relieved or seamless pipe. The circumferential weld joints shall be tested by 100% X-Ray quality (Please mention the size). Hoist Wire Rope Details Confirming to IS: 2266 with Fiber core. Crane Operation Through Radio Remote Control and also with Pendant control of Reputed Make with Push Button for ON, OFF, UP, DOWN, Forward, Reverse, Left, Right, Siren, Bridge Light & Emergency Stop with option for control selection. Push Button Type Radio Remote control for all motions shall be supplied. Radio remote control should be multi speed steps of operation. The unit works with rechargeable batteries. Battery charger to be provided along with the unit & rechargeable batteries. The crane shall be controlled by pendant moving independently of crab along full length of bridge on separate track. Pendent should be of Die cast Aluminum having push buttons for each motion, stay put type emergency stop switch along with mode (RRC or Pendant) selector switch. Pendent shall be hanged in the middle of Bridge Girder with Chrome plated steel chain & duly covered with sleeve Guards