Industrial Cranes
Reva’s Double Girder EOT Cranes are fine examples of practical, intelligent, reliable , economical and balanced solutions for Overhead Handling of loads. Be it for a foundry shop or a godown, our cranes have been designed and manufactured for all needs.
Industrial D/G EOT Crane
End Carriages : End Carriages are of standardised wheel bases in R-10 series. These Box shaped carriages are of welded construction with R-Block bearings. The fabricated end carriages are machined on a horizontal boring machine ensuring perfect axial alignment, parallelism and perpendicularity of the wheels individually and in pairs.The construction of R blocks is such that it is easy wheel maintenance/change. Rubber / spring buffers are supplied according to requirements.
Crane Wheels : The double flanged cylindrical wheels are made from high strength C55MH75 steel. Running surfaces are hardened to 26 HRC. The wheels run on self aligning anti-friction roller bearings and have substantial flanges on either side of the machined running face. The wheels are shrunk fit onto their respective axles. The split housing design allow easy replacement of the wheels.
Traveling Machinery : Compact modular traveling machinery unit consists of a hollow output shaft gear box to
be mounted directly on the wheel axle thus eliminating any chance of misalignment. These units are maintenance free and supplied with squirrel cage/slip ring motors with disc/electro-hydraulic thruster brakes. The gears and pinion in the traveling machinery are 100% helical, hardened achieving 99% efficiency.
Planetary Gear Boxes /Micro-Drives : Depending on customer needs the crane can be equipped with micro-drive using Reva’s own well balanced planetary gear boxes for obtaining creep speeds (ratio 10:1 or 5:1) for hoisting, traveling and traversing motions. The planetary units have favourable volume to power ratio because of power sharing between gear meshes.
Brakes : Reva provides 100% Redundancy in Hoisting brakes by providing 2 brakes each of 150% of the required torque. The thruster brake are operated by an integral 3 phase squirrel cage motor. In travelling motions, electromagnetic disc brakes are mounted directly on motors. D.C brakes and other combinations for hoisting and other motions can be provided for specific application on request.
Controls : Pendant, cabin or radio remote operated cranes can be supplied in any mode or combination of modes. As a standard Trailing type Pendant is provided in Double Girder crane. Adequate protection by way of single phasing, phasing reversal, overloads, brakes are some of the standard features. Dynamic brakes suitable for slipring/squirrel cage motors for precise handling can also be supplied. The sheet steel-metal housings are constructed to accommodate the power and control circuits in a single cubicle having built-in cable trench underneath. The spacing and making are as per IS specification. Cranes with VVVFD control can help achieve stepless speed variation and have various inbuilt motor protections.
Cabin : Constructed from sheet-metal the cabins are suspended either on one side of the crane or in the middle. They are open types for indoor use or close types for outdoor use. Air conditioned cabins are also available.
All cabins have a protective panel and controls are ergonomically placed for maximum comfort to the operator. Emergency switches too are provided.
Rope System : The drums are made of seamless steel pipes or pipes fabricated from plates tested as per ATSM/IS. The drum is coupled to the gearbox and this facilitates easy removal and maintenance. Wire rope is fixed with double slot camps. Non-rotating, high strength special Hyflex wire ropes, manufactured for use on hoisting equipment, are used with safety as per IS standards.
Hooks & Sheaves : Hooks can be plain shank trapezoidal section or ramshorn type. Sheaves are of cast iron or of fabricated construction mounted on anti-friction bearings. Forged/rolled steel sheaves are used against specific requirement.
Hooks are fixed with thrust bearings in well-designed Cross Heads for maximum maneuverability. Each hook is proof load tested as per IS:15560.
Quality Assurance : All cranes, its assemblies, sub-assemblies are tested as per a Standard Quality Plan including proof load & over load test. Various stage inspections as per standard QAP can be witnessed if needed. Hooks & Sheaves Hooks can be plain shank trapezoidal section or ramshorn type.
Sheaves are of cast iron or of fabricated construction mounted on anti-friction bearings. Forged/rolled steel sheaves are used against specific requirement. Hooks are fixed with thrust bearings in well-designed Cross Heads for maximum maneuverability. Each hook is proof load tested as per IS:15560 Starts.
