FEM Standard Single Girder EOT Crane

Core Components: Gearbox, Motor, Gear

Place of Origin: Henan, China

Warranty: 1 Year

Weight (KG): 10000 kg

Video outgoing-inspection: Provided

Machinery Test Report: Provided

Selling Units: Single item

Single package size: 600X300X300 cm

Single gross weight: 200.000 kg

 

 

 

1.Main beam

Box-Type or Profile Girder Design:
Typically uses a welded box-type girder or rolled I-beam section, depending on span and load.

The box-type girder is more common in larger spans or when higher stiffness and lower deflection are required.

FEM-optimized cross-section reduces weight while maintaining high load capacity.

 

2.Lifting System

Electric Wire Rope Hoist (European Type)
Compact, modular design with low headroom, allowing for maximum lifting height under limited roof clearance.

Mounted directly to the bottom flange of the main girder or via a low-headroom trolley frame.

FEM-rated duty classes (1Am, 2m, 3m, etc.) tailored to lifting frequency and load demands.

Hoisting Motor
High-efficiency 3-phase asynchronous motor, typically S4 duty, designed for frequent start/stop cycles.

Options for single-speed, dual-speed, or VFD (Variable Frequency Drive) control.

Equipped with thermal protection sensors (PTC or bimetal) to prevent overheating.

Gearbox / Reducer
Helical or planetary gear reducer, oil-lubricated and housed in a compact casing.

Provides high torque transmission, smooth lifting, and minimal maintenance.

Quiet operation and high mechanical efficiency.

Wire Rope & Drum
Uses galvanized anti-twist wire rope with high breaking strength and fatigue resistance.

Wound on a precision-machined rope drum with deep grooves to prevent overlap or crushing.

Optional rope guide ensures smooth spooling and extends wire rope life.

Hook Block
High-strength forged steel hook with 360° swivel and spring-loaded safety latch.

Mounted on a single or double pulley block depending on load capacity and configuration.

Bearings sealed and maintenance-free for long service life.

3.End carriage

Structure & Design:
Modular Welded Box Structure:

Fabricated from rectangular steel tubes or high-quality plates using robotic or automatic welding, ensuring excellent torsional and bending resistance.

Precisely machined interfaces for smooth assembly with the main girder and accurate wheel alignment.

Compact & Lightweight:

FEM-optimized design reduces self-weight while maintaining structural integrity.

Low wheel loads minimize stress on crane runway beams or tracks.

 

4.Crane travelling mechanism

Travel Motors
Equipped with compact, low-noise, energy-efficient motors (e.g. SEW, ABM, NORD, or equivalent).

Motors are squirrel-cage asynchronous type, capable of handling frequent starts and stops.

Control options:

Two-speed motor (e.g. 20/5 m/min)

VFD-controlled motor (stepless speed regulation for smooth acceleration and deceleration)

Thermal overload protection and IP54/IP55 enclosures ensure long service life in industrial environments.

5.Trolley travelling mechanism

Trolley Frame
Compact, FEM-optimized welded steel structure, designed to support the hoist and travel components.

Lightweight yet strong, minimizing added load to the main beam.

Precision-machined wheelbase ensures smooth alignment and operation.

Travel Motor
High-performance three-phase squirrel cage motor, typically dual-speed or VFD-controlled for smooth start and stop.

Directly coupled with gearbox to reduce energy loss and mechanical wear.

Motors are sealed to IP54/IP55 standards, with Class F insulation.

Gearbox
Helical or planetary gearbox provides reliable torque transmission and compact structure.

Factory-lubricated with synthetic oil for long service intervals and quiet operation.

Travel Wheels
Forged steel wheels, heat-treated for high hardness and wear resistance.

Mounted with sealed, maintenance-free bearings.

Double-flanged wheels ensure accurate travel along the top flange of the main girder.

Trolley Rail
Precisely installed flat bar or rail mounted along the top of the main girder.

Engineered for low friction, high alignment accuracy, and long service life.

6.Crane wheel

Material & Manufacturing
Made from forged or cast alloy steel (typically 42CrMo or equivalent), ensuring high strength, wear resistance, and fatigue durability.

Heat-treated (quenched and tempered) to a hardness of HB300–380, prolonging service life under heavy loads.

Design Types
Double-flanged wheels: Common for end carriages to prevent derailment on standard rail tracks.

Single-flanged or flat wheels: Used for trolley mechanisms depending on rail configuration.

Wheel sizes and flange heights are customized based on track type (e.g., QU70, P43, or square bar).

7.Crane Hook

Forged High-Strength Construction
Manufactured from high-quality forged alloy steel (typically 20Mn5, 34CrMo4, or equivalent).

Heat-treated for enhanced toughness, fatigue resistance, and long-term durability.

Hook Types
Single hook: Standard for capacities up to ~10 tons, offering a compact, lightweight lifting solution.

Double hook (double-sheave): Used for higher capacities or where balanced lifting is required.

C-type hook available for coil or specialized load handling (optional).

360° Swiveling Hook
The hook body is mounted on a rotatable thrust bearing, allowing 360° rotation for easy load positioning.

Rotation is manual or motorized (optional for high-capacity or special applications).

Safety Latch
Equipped with a spring-loaded safety latch to prevent accidental unhooking.

Latch design complies with EN standards for industrial lifting hooks.

8.Motor

Hoisting Motor
High-torque asynchronous squirrel cage motor.

Designed for S4 or S3 duty cycle with high start-stop frequency.

Usually features 2-speed (fast/slow) or Variable Frequency Drive (VFD) for smooth and precise lifting.

Equipped with electromagnetic brake for fast, secure load holding.

Trolley Travel Motor
Compact, low-noise motor built into a geared travel unit (e.g., SEW, ABM, NORD, or OEM).

Offers stepless speed control via VFD or dual-speed (e.g., 20/5 m/min).

Optimized for smooth acceleration and deceleration, minimizing load swing.

Crane Travel Motor
Similar to trolley motor, but sized for higher power depending on crane span and load.

Optional anti-skew synchronization with encoder feedback for longer spans.

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9.Sound and light alarm system & limit switch

Sound and Light Alarm System
Purpose:
Alerts nearby personnel of crane activity, startup, motion, or abnormal conditions.

Enhances safety in busy workshops, factories, and warehouses, especially with limited visibility or high noise environments.
Limit Switches
Limit switches are installed at critical motion points to prevent over-travel and ensure safe operational limits of crane and trolley motions.

Types of Limit Switches:
Lifting Limit Switch (Hoist Upper/Lower Limit):

Stops the hoist when the hook reaches maximum or minimum allowable height.

Prevents collision with the drum or floor, avoiding rope slack or over-winding.

Trolley Travel Limit Switch:

Stops the trolley at the ends of the main girder rail.

Prevents trolley derailment and mechanical impact.

Crane Travel Limit Switch:

Installed at both ends of the crane runway track.

Stops long travel motion automatically to prevent crashing into buffer stops or end carriages.

Rotary Encoder (Optional):

For intelligent position detection and travel control (can replace or supplement traditional switches in modern FEM designs).

10.Safety Devices

Overload Protection Device
Continuously monitors the load weight during lifting.

Prevents lifting if the load exceeds the crane's rated capacity by shutting down the hoist motor or activating alarms.

Often integrates load cells or strain gauge sensors for precise measurement.

Limit Switches
Includes lifting limit switches, trolley travel limit switches, and crane travel limit switches.

Automatically stops motion to prevent over-travel and mechanical collisions.

Ensures safe operation within predefined travel and lifting ranges.

Emergency Stop System
Multiple emergency stop buttons located on the crane cabin, pendant controller, and remote control.

Instantly cuts power to all crane movements when pressed.

Provides immediate operator control to halt all operations during hazards.

Anti-Collision Devices (Optional)
Uses sensors or photoelectric systems to detect obstacles in the crane's path.

Automatically stops crane movement or triggers alarms to prevent collisions.

Particularly useful in busy or congested work environments.

Anti-Sway Control (Optional)
Reduces load swinging during acceleration, deceleration, and emergency stops.

Improves positioning accuracy and safety by stabilizing the load dynamically.

Phase Failure and Phase Sequence Protection
Protects crane motors from damage caused by incorrect or missing electrical phases.

Prevents crane startup under unsafe electrical conditions.

11.Control Mode

Pendant Control
Handheld pendant station with push buttons or joysticks.

Allows the operator to control lifting, trolley travel, and crane travel from a safe position near the load.

Ergonomically designed with emergency stop button and dead-man switch for enhanced safety.

Wireless Remote Control
Radio remote control system providing freedom of movement and better visibility.

Equipped with multiple control channels for simultaneous operation of hoist, trolley, and crane travel.

Includes safety features such as signal loss auto-stop, emergency stop button, and low battery alarm.

Ideal for large work areas or where fixed control stations are inconvenient.

Operator Cabin Control
Enclosed cabin mounted on the crane girder or crane runway.

Provides the operator with a clear view of the working area.

Equipped with joysticks, pedals, and control panels for intuitive crane operation.

Cabin can be air-conditioned and soundproofed for comfort in harsh environments.

Ground Control Room (Optional)
For complex or automated crane systems, control may be operated remotely from a fixed ground control room.

Integrates with PLC and SCADA systems for automated scheduling, monitoring, and diagnostics.

Sketch

 

Main technical

 

 

Optimized Lightweight Design

The FEM-designed main beam and components ensure low dead weight, reducing stress on building structures and runway girders.

Allows for easier installation and lower foundation costs.

High Efficiency & Precision

Advanced motor and control systems provide smooth, accurate lifting and travel.

Variable frequency drives enable stepless speed control for precise load positioning.

Enhanced Safety Features

Comprehensive safety devices including overload protection, limit switches, emergency stops, and alarms ensure safe operation.

Compliance with international safety standards (FEM, ISO, EN).

Reduced Maintenance & Operational Costs

Use of high-quality components such as sealed bearings, durable wire ropes, and robust motors minimizes downtime.

Modular design allows for easy inspection and replacement of parts.

Flexible Control Options

Supports pendant, wireless remote, and operator cabin control modes.

Enables adaptation to various working environments and operator preferences.

Space-Saving & Low Headroom

Compact design with low headroom hoists maximizes usable lifting height.

Ideal for workshops or factories with height restrictions.

 

Manufacturing Plants

Handling raw materials, components, and finished products.

Assisting assembly lines and production processes.

Suitable for industries such as automotive, electronics, machinery, and metal fabrication.

Warehouses and Logistics Centers

Loading, unloading, and transferring goods.

Facilitating pallet handling and storage.

Ideal for inventory management and distribution.

Maintenance Workshops

Lifting and moving heavy machinery and equipment during repair and servicing.

Supporting routine maintenance tasks with precision and safety.

Machine Shops and Fabrication Facilities

Handling heavy metal parts, molds, and tools.

Supporting welding, machining, and assembly operations.

Light to Medium Industrial Production

Managing materials in food processing, textile, and packaging industries.

Where moderate lifting capacity and compact crane design are advantageous.

Indoor Applications with Limited Headroom

Facilities requiring low headroom cranes due to building height restrictions.

Environments where maximizing lifting height is critical.

 

1. Design and Engineering
Detailed engineering drawings and 3D models are created based on customer requirements and FEM standards.

Structural calculations, load analysis, and dynamic simulations ensure optimized performance.

Electrical and control system schematics are prepared.

2. Material Procurement
High-quality materials (steel plates, motors, electrical components) are sourced from certified suppliers.

Material certifications and inspection reports are verified.

3. Main Beam Fabrication
Steel plates are cut using CNC plasma or laser cutting machines for precision.

Welding of the box girder or I-beam main beam is done by automatic submerged arc welding (SAW) for uniform strength.

Welds undergo non-destructive testing (NDT) such as ultrasonic or magnetic particle inspection.

4. Component Manufacturing
Fabrication of end carriages, trolley frames, and hook assemblies with precision machining.

Manufacture or assembly of crane wheels, gears, and motor housings.

5. Surface Treatment
Shot blasting to remove rust and impurities.

Application of anti-corrosion primer and industrial-grade paint for durability and appearance.

6. Electrical Assembly
Installation of motors, wiring, control panels, and safety devices.

Integration of PLC, variable frequency drives (VFDs), limit switches, and alarms.

7. Mechanical Assembly
Assembly of main beam, end carriages, trolley, hoist, and traveling mechanisms.

Installation of wheels, brakes, and coupling devices.

8. Testing and Inspection
Load testing at factory, typically at 125% of rated capacity, to verify structural integrity and performance.

Functional tests of all electrical and mechanical systems.

Safety device verification, including emergency stops, overload protection, and limit switches.

9. Packaging and Shipping
Components are carefully packed to prevent damage during transportation.

Detailed documentation including user manuals, maintenance guides, and certification reports are prepared.

10. Installation and Commissioning (On-Site)
Supervised assembly and installation at customer site by skilled technicians.

Final testing, calibration, and operator training before handover.

Workshop view:

The company has installed an intelligent equipment management platform, and has installed 310 sets (sets) of handling and welding robots. After the completion of the plan, there will be more than 500 sets (sets), and the equipment networking rate will reach 95%. 32 welding lines have been put into use, 50 are planned to be installed, and the automation rate of the entire product line has reached 85%.