Scissor Lift

Product Overview

Stationary industrial scissor lift tables engineered for heavy vertical material handling across assembly lines, distribution hubs, and manufacturing facilities. Built with heavy-gauge structural steel pantograph arms and honed hydraulic cylinders, these units ensure vertical tracking stability under demanding daily operating cycles. Available in single, double, and multi-pantograph configurations tailored to precise stroke, platform footprint, and load capacity requirements.

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Key Features

Rigid Pantograph Linkage:

Precision laser-cut structural steel arms engineered to minimize lateral deflection during full-capacity and off-center loading.

Low Profile Options:

Reduced closed heights allow smooth pallet truck loading, minimizing or eliminating the need for deep concrete floor pit excavation.

Multi-Point Roller Guidance:

Machined steel rollers operating inside reinforced guide tracks distribute dynamic horizontal forces evenly.

Self-Lubricating Pivot Bearings:

Composite bronze-lined steel bushings at all hinge points eliminate daily greasing schedules and prevent joint binding.

Mechanical Maintenance Locks:

Integrated heavy-duty safety lockout bars physically secure the raised platform to ensure safety during routine hydraulic servicing.

Technical Specifications

Model	Load Capacity	Platform Dimensions (L x W)	Raised Height	Lowered Height	Actuation Time	Motor Rating
SL-2000	2,000 kg (4,400 lbs)	1,700 x 1,000 mm	1,780 mm	300 mm	35 sec	2.2 kW
SL-4000	4,000 kg (8,800 lbs)	2,000 x 1,200 mm	2,050 mm	350 mm	45 sec	3.0 kW
SL-6000	6,000 kg (13,200 lbs)	2,500 x 1,500 mm	2,400 mm	420 mm	60 sec	4.0 kW

Power Supply: Standard 380V / 50Hz / 3-Phase (custom multi-voltage options available upon request).
Operating Pressure: 16 to 21 MPa.
Hydraulic Fluid Type: ISO VG 46 anti-wear hydraulic oil.

Working Principle / Operating System

The hydraulic power unit delivers pressurized fluid to heavy-wall displacement cylinders, extending the piston rods outward. This linear displacement forces the pantograph scissor arms to expand vertically. Platform descent is gravity-actuated, governed by an adjustable proportional flow-control valve that regulates return fluid discharge back to the reservoir, ensuring consistent and smooth downward velocity regardless of load weight.

Main Component

Hydraulic Power Unit:

High-pressure internal gear pump coupled to an IP54 totally enclosed fan-cooled (TEFC) electric motor, housed in a sealed steel reservoir tank.

Cylinders:

Honed seamless steel tubing paired with hard-chrome plated piston rods, equipped with durable multi-lip polyurethane seal kits to prevent fluid bypass.

Pins and Axles:

High-strength alloy steel pivot shafts, induction-hardened and precision-ground for exact rotational clearance control.

Manifold Block:

Integrated aluminum or steel valve blocks utilizing screw-in cartridge valves for pressure relief, check, and load-holding functions.

Safety and Control

Perimeter Toe Guard:

Extruded mechanical safety edge installed beneath the platform perimeter; immediately halts downward travel upon contact with any obstruction.

Velocity Fuses (Hose-Burst Valves):

Flange-mounted safety check valves directly bolted to cylinder ports; instantaneously lock fluid inside the cylinder if hydraulic line pressure drops due to a hose rupture.

Overload Relief Valve:

Factory-set pressure limiting valve prevents operation if loads exceed 110 percent of the rated capacity threshold.

Control Station:

NEMA 4 / IP55 rated enclosure featuring 24V DC momentary-contact pushbuttons, a maintained emergency stop palm switch, and a keylock power isolator.

Applications

Automotive Assembly Cells:

Ergonomic elevation of vehicle frames, subassemblies, and heavy powertrains to reduce operator fatigue.

Warehouse Loading Docks:

Bridging height disparities between warehouse concrete bays and delivery transport vehicle beds.

Mezzanine Level Material Transfer:

Vertical freight transit between multi-tier industrial storage levels without permanent elevator shaft construction.

Metal Coil and Sheet Feeding:

Direct vertical positioning of heavy raw material coils and steel blanks into stamping presses and shears.

Manufacturing and Quality Control

Plate Processing and Welding:

Steel plates are cut using fiber laser systems and welded by certified robotic MIG welding stations using low-hydrogen electrodes for structural joint integrity.

Surface Treatment:

Structural steel undergoes automated abrasive blast cleaning to industrial standards, followed by electrostatic thermosetting polyester powder coating cured at high temperatures for environmental corrosion resistance.

Factory Testing Protocol:

Every finished unit undergoes a 125 percent static proof load test and a 100 percent dynamic load test under full operating pressure prior to crating.

Traceability:

Material test certificates and weld inspection records are archived and accessible upon request.

Customization and OEM

Platform Top Modifications:

Custom dimensions, stainless steel (SUS304/SUS316) top cladding, integrated gravity roller conveyors, or powered rotation turntables.

Environment-Specific Builds:

Special electrical packages for chemical processing or cold storage freezer applications rated down to -30 degrees Celsius.

System Integration:

Custom mounting footprints, remote valve control consoles, and dry-contact PLC integration terminals for automated guided vehicle (AGV) interfaces.

Technical Support and After-Sales Service

Engineering Documentation:

Each unit ships with an English operation manual, hydraulic schematic diagrams, electrical wiring schematics, and a bill of critical spare parts.

Warranty Terms:

2-year structural warranty on steel frame fabrications and 1-year warranty on hydraulic power units and electrical control elements.

Spare Parts Logistics:

Core replacement parts (cartridge valves, seal kits, limit switches) maintained in inventory for rapid global dispatch.

FAQ

Q: What is the operational difference between pit-mounted and surface-mounted models?

A: Surface-mounted units sit directly on top of the existing finished concrete floor, requiring an access ramp and resulting in a closed height between 300 mm and 420 mm. Pit-mounted units are installed inside a recessed concrete foundation pit, allowing the platform top to sit completely flush with the floor when fully lowered, enabling unobstructed forklift and hand-truck roll-on access.

Q: How do these lifts manage eccentric (off-center) loading?

A: Industrial scissor lifts are engineered to accommodate up to 50 percent transverse and 50 percent longitudinal off-center loads relative to rated capacity. Base frame footprint proportions, roller carriage tolerances, and pivot pin shear diameters are validated using engineering analysis to limit side-load deflection and maintain vertical tracking.

Q: What specific mechanisms prevent the platform from dropping if a hydraulic line fails?

A: Velocity fuses (pipe-rupture safety valves) are directly flange-mounted to the cylinder inlet ports. If a hydraulic hose experiences a sudden pressure drop or rupture, the internal spring-loaded check valve slams shut instantaneously, trapping oil inside the cylinder to freeze the platform position.

Q: Can the lift controls be integrated into an existing plant PLC or automated assembly line?

A: Yes. Control panels can be configured with 24V DC discrete I/O terminals or relay interface cards to establish hardware handshake protocols with conveyor systems, safety light curtains, limit switches, and Automated Guided Vehicles (AGVs) for automated cycle execution.

Q: What routine maintenance is required for the hydraulic subsystem?

A: Maintenance is limited to checking hydraulic oil levels every 6 months, replacing the hydraulic fluid and suction strainer filters annually (or every 2,000 operating hours), and inspecting hose fittings for weepage. Daily greasing is eliminated due to the factory installation of self-lubricating composite pivot bushings.

Q: What technical parameters must be provided to obtain an accurate custom quotation?

A: Submit your maximum required load capacity, platform dimensions (length and width), desired raised height, available lowered height (pit depth limitations), electrical power supply characteristics (voltage/phase/frequency), and estimated duty cycle frequency (cycles per hour). Layout sketches or CAD integration models can also be attached for formal engineering review.

As one of the most professional scissor lift manufacturers and suppliers in China, we also support customized service. We warmly welcome you to wholesale discount scissor lift in stock here from our factory. For price consultation, contact us.