Gradin builds cantilever Vertical Reciprocating Conveyors (VRCs) for multi-level material transfer. The single-mast design is intended for installations where a standard 4-post lift will not fit. Every unit is engineered to order. We design and manufacture the guide rails, carriage, and drive system based strictly on your required load capacity, platform dimensions, and travel height.
| Category | Specification | Technical Data / Range |
| Capacity & Dimensions | Max. SWL (Safe Working Load) | Fully customizable to specific payload requirements |
| Max. Lifting Height | Engineered to match multi-story facility heights | |
| Platform Dimensions (L×W) | Custom engineered to specific pallet/cargo | |
| Infeed/Outfeed Layout | Z-shape (Opposite), C-shape (Same), L-shape (90°) | |
| Performance & Drive | Lifting Speed | Variable speed customizable via VFD |
| Drive Mechanism | Top-mounted gear motor with chain drive | |
| Duty Cycle | Continuous / High-frequency operation ready | |
| Electrical & Control | Main Power Supply | 3-Phase, 380V/400V/480V, 50/60Hz |
| Control Voltage | 24V DC | |
| Control System | PLC (Siemens / Omron / Mitsubishi options) | |
| System Integration | Dry contact / Ethernet (WMS/WCS interface) | |
| Safety & Enclosure | Core Safety Devices | Anti-fall block, slack-chain sensor, overload limiter |
| Enclosure Protection | Welded steel mesh panels | |
| Access Doors | Electromechanical interlocked gates |
Compact Single-Mast Structure: The cantilever design eliminates the need for a fully enclosed structural shaft. It mounts directly to a load-bearing wall or steel framework, making it suitable for narrow aisles or space-restricted plant areas.
Configurable Material Flow: The open-platform structure allows loading and unloading from multiple sides. The hoist is configurable for Z-type (opposite sides), C-type (same side), or L-type (90-degree) infeed and outfeed layouts.
VFD-Controlled Operation: Powered by a top-mounted gear motor integrated with a Variable Frequency Drive (VFD). This setup provides controlled acceleration and deceleration, preventing cargo shifting during vertical transit.
Gradin Standard Safety Systems: All manufactured units include mechanical anti-fall blocks, slack-chain sensors, overload limiters, and heavy-duty steel mesh enclosures with floor-interlocked access doors to meet international industrial safety standards.
Material transfer in space-restricted older manufacturing plants.
End-of-line vertical conveying for AS/RS (Automated Storage and Retrieval Systems).
Floor-to-floor logistics in cleanrooms, packaging facilities, and warehouse mezzanines.
For this heavy-duty series, we can engineer load capacities up to [300] tons, with platform dimensions and lifting heights customized to your operational envelope. Requirements exceeding our standard engineering matrix will undergo a Finite Element Analysis (FEA) by our engineering team to ensure structural viability before proposing a solution.
To initiate the engineering proposal, please provide the following baseline data:
Rated Load Capacity
Maximum Lifting Height & Closed Height
Platform Dimensions (L x W)
Duty Cycle (e.g., operational cycles per hour/day)
Environmental Conditions (e.g., indoor/outdoor, washdown, explosion-proof)
Pit depth or overhead clearance constraints
Yes. The control systems can be equipped with standard communication protocols (e.g., Profinet, Modbus, Ethernet/IP) utilizing [Siemens / Allen-Bradley / Omron] PLCs. This ensures seamless I/O signal synchronization with upstream/downstream conveyors, AGV/AMR units, and your central control room.
Every custom unit undergoes a mandatory Factory Acceptance Test (FAT) prior to dispatch. This includes continuous operational testing at 100% rated load, static overload testing at [120% / 125%] capacity, and the physical triggering of all mechanical anti-fall and hydraulic safety interlocks. FAT documentation and video proof are included in your engineering package.
Upon final approval of the General Arrangement (GA) drawings, the manufacturing lead time is typically 4 to 8 weeks. Oversized structural components are engineered with a modular design to fit into standard shipping containers (20FT/40HQ). On-site assembly utilizes pre-engineered bolted flange connections and heavy-duty aviation plugs, strictly eliminating the need for field welding.
We provide a standard [12/24]-month warranty covering the structural frame and primary hydraulic/electrical components. To minimize operational downtime, a comprehensive set of standard consumables (e.g., cylinder seal kits, travel switches, relays) is shipped alongside your equipment. During the warranty period, replacement parts for non-human-induced failures are dispatched via priority air freight (DHL/FedEx) within 48 hours.
Beyond the warranty, we guarantee lifetime engineering support. Your custom equipment's CAD drawings, electrical schematics, and BOM (Bill of Materials) are permanently archived in our system. This ensures you receive uninterrupted remote troubleshooting, maintenance guidance, and exact spare parts matching for the entire lifecycle of the equipment.
Gradin Machinery is a leading manufacturer specializing in aerial work platforms and hydraulic lifting solutions. With ISO & CE certifications, we provide safe, reliable, and customized equipment for global industrial needs
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