Jacks come in a variety of types and designs, each tailored for distinct lifting applications. These versatile tools leverage mechanical advantage to elevate heavy loads off the ground, facilitating easier maintenance, installation, and transportation. Here are some of the prevalent types of jacks:
1. Hydraulic Jacks，Mechanism: Utilize hydraulic oil pressure to generate lifting force, offering smooth operation and high load capacity.
Key Features:
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- Built-in Safety Valves: Prevent overloads by automatically releasing excess pressure (e.g., 2-ton trolley jacks with TUV/GS certification).
- Adjustable Trays: Rotatable designs (300mm lift height) enable precise positioning under uneven loads.
- Material Durability: High-strength aluminum/steel hybrids resist deformation under cyclic loads (tested for 20-ton capacities).
Applications:
Automotive Repair: Ideal for lifting SUVs and sedans (e.g., BENTISM’s 20-ton bottle jack with a 9.4–17.7″ height range).
Building Rectification: Monotonic and cyclic loading capabilities stabilize tilted structures, with lab-tested parallelepiped steel supports ensuring rigidity.
2. Bottle Jacks，Mechanism: Vertical hydraulic pistons within compact, cylindrical casings maximize power-to-size ratios.
Key Features:
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- Portability: Weighing as little as 21.2 lbs, they fit in vehicle trunks for roadside emergencies.
- Pressure Relief Systems: Safety valves prevent catastrophic failures during 20-ton lifts.
- Corrosion Resistance: Galvanized steel bodies withstand marine environments.
Applications:
Industrial Maintenance: Lift heavy machinery in confined spaces (e.g., wind turbine gearboxes).
Construction: Paired with cribbing systems to temporarily support beams during structural repairs.
3. Rack and Pinion Jacks，Mechanism: Convert rotational motion into linear lifting via a gear-driven rack.
Key Features:
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- Mechanical Advantage: Achieve 4:1 force multiplication for manual operation.
- Modularity: Electrically powered variants integrate 12V systems for automated lifting (common in modern vehicles).
Applications:
Infrastructure Projects: Lift bridge segments or railway tracks with millimeter precision.
Aerospace Assembly: Position aircraft components using ISO-certified models with 0.05mm tolerance.
4. Scissor Jacks，Mechanism: A collapsible scissor-like frame driven by a leadscrew.
Key Features:
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- Compact Storage: Foldable design fits in car breakdown kits.
Lightweight: Aluminum alloys reduce weight while maintaining 1.5–3-ton capacities.
- Compact Storage: Foldable design fits in car breakdown kits.
Applications:
Emergency Vehicle Lifts: Standard in passenger cars for tire changes.
Warehouse Logistics: Adjust pallet racking systems with minimal manual effort.
5. House (Screw) Jacks，Mechanism: Acme-threaded rods provide incremental lifting for structural stability.
Key Features:
- Load Distribution: Cast iron pads prevent tilting during multi-jack synchronization.
- Laboratory-Tested: Calibrated models for building rectification withstand both static and dynamic forces.
By selecting jacks aligned with load dynamics, environmental conditions, and industry standards (e.g., CE/GS, ASME), professionals can ensure both operational safety and longevity. From compact bottle jacks for roadside emergencies to AI-driven systems for skyscraper alignment, these tools epitomize the fusion of mechanical ingenuity and modern engineering.
