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A rail jack is a heavy-duty lifting device for railway maintenance, used to raise tracks for repairs, alignment, or installation of components, with types including mechanical (screw-based) and hydraulic, designed for safety, high load capacity, and ease of operation under harsh conditions, often featuring specialized clamps and quick-release mechanisms. They come in various forms, from simple ratchet types to more advanced A-frame or hydraulic units, enabling efficient work on ballast or ballastless tracks. This video provides an overview of railway lifting jacks:31sTOTALKARE WORKSHOP EQUIPMENT EXPERTSYouTube • 19 Jun 2023Key Types

• Mechanical Track Jack: Uses a screw mechanism, often with a ratchet, for lifting; durable and simple to maintain, with features like grip locking for stability.
• Hydraulic Jack: Uses hydraulic power for lifting, often integrated with other systems for lining (aligning) the track, and can be more compact.
• Obstructionless Jack: Designed to be quickly released and project minimally above the rail, allowing trains to pass over it safely, as described in this specification from the Indian Railways RDSO.
• A-Frame Jack: Allows lifting and movement of the rail in multiple directions (longitudinal and lateral) for complex adjustments. 

You can watch this video to see how different types of jacks work:53sHaynes ManualsYouTube • 3 Oct 2017Features & Functions

• Lifting & Lining: Lifts the track for general maintenance and also helps with alignment.
• Load Capacity: Varies widely, from a few tons (e.g., 3MT, 8T) to much higher, suitable for heavy loads.
• Clamping: Often features specialized clamps to grip the rail head securely.
• Safety: Built with high safety factors, often including features like thrust bearings for smooth operation and quick-release mechanisms for emergencies.
• Versatility: Can be used in various settings, including ballastless tracks where conventional jacks might not fit. 

This video explains the anatomy of jacks and their components:48sDesign WorldYouTube • 26 May 2016Applications

• Track Maintenance: Essential for maintenance and repair of railway lines.
• Construction: Used for hoisting track panels and heavy articles.
• Industrial Use: Can lift heavy machinery like presses and CNC machines in factories. 

• Rail/Track Jacks - Pujara EngineersRail Jacks are used to lift rail or track for different applications during maintenance and construction of railway track. We spec...Pujara Engineers
• Hydraulic Railway Track Jack for Rail Lifting and Lining - RailFactor* Hydraulic Railway Track Jack. It is new type equipment that is used on the railway line's maintenance and repairing. The most im...RailFactor
• Specification of Mechanical Track Jack(8T) (Non-infringing type)Scope: This specification covers the technical, functional and testing requirement of a non-infringing light weight mechanical tra...RDSO

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