Editorial Technical Reference

End Trucks

This page explains how End Trucks is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

Structural components at the ends of a crane bridge that support the bridge girders and house the wheels for horizontal movement along the runway rails.

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Product Specifications

Technical details and manufacturing context for End Trucks

Definition
End trucks are critical structural components located at both ends of an overhead material handling crane's bridge. They serve as the support structures that carry the bridge girders and contain the wheel assemblies that enable the entire crane to travel horizontally along the runway rails. End trucks transfer the crane's load to the runway system and provide the mechanical interface for the drive and braking systems that control crane movement. Typically fabricated from structural steel, end trucks are designed to meet specific load and span requirements. Key parameters include rated load capacity (5–50 t), span (7.5–31.5 m), wheel diameter (250–800 mm), wheel base (2000–6000 mm), rail gauge (1500–6000 mm), maximum wheel load (50–400 kN), travel speed (20–80 m/min), motor power (1.5–15 kW), operating temperature (-20 to 60 °C), ingress protection (IP54–IP65), material grade (Q235B–Q355B), and weight (500–5000 kg). These values are reference ranges per GB/T 3811, GB/T 4628, and IEC 60529; actual specifications must be confirmed with the manufacturer. End trucks are selected based on crane capacity, span, runway design, and environmental conditions. They interface with the runway rails and the bridge girders, and must be compatible with the drive and braking systems. Verification questions include checking wheel load against rail capacity, ensuring rail gauge matches runway spacing, and confirming material grade for low-temperature service. Maintenance signals include unusual noise, vibration, or wear on wheels and rails. Failure boundaries include exceeding rated load or wheel load, which can cause structural failure or rail damage. Always verify model-specific values and standards with the legal manufacturer or supplier.
Working Principle
End trucks function by supporting the bridge structure through their connection to the bridge girders. The wheels mounted within the end trucks roll along the runway rails, allowing the crane to traverse the length of the building or workspace. Drive motors, typically mounted on one or both end trucks, provide the power for movement, while braking systems ensure controlled stopping and positioning. The load from the bridge and the lifted load is transferred through the end trucks to the wheels and then to the runway rails. Proper alignment and wheel-rail contact are essential for smooth travel and to prevent excessive wear. The design of the end truck must accommodate the specified wheel base and rail gauge to distribute loads evenly and maintain stability.
Common Materials
Structural steel
Technical Parameters
ParameterTypical rangeNotes & selection driver
Rated Load Capacity5–50 tMaximum load per end truck; above this, structural failure risk.GB/T 3811
Span7.5–31.5 mDistance between runway rails; affects bridge stiffness.GB/T 3811
Wheel Diameter250–800 mmDetermines load distribution and rail compatibility.GB/T 4628
Wheel Base2000–6000 mmLonger base improves stability but increases footprint.
Rail Gauge1500–6000 mmMust match runway rail spacing.GB/T 3811
Maximum Wheel Load50–400 kNCritical for runway design; exceeding may damage rails.GB/T 3811
Travel Speed20–80 m/minAffects productivity and motor sizing.GB/T 3811
Motor Power1.5–15 kWPer end truck; depends on load and speed.GB/T 3811
Operating Temperature-20–60 °CBelow -20°C requires low-temp steel; above 60°C reduces lubricant life.GB/T 3811
Ingress ProtectionIP54–IP65Higher IP for dusty or wet environments.IEC 60529
Material GradeQ235B–Q355BHigher grade for heavier loads or low-temperature service.GB/T 700, GB/T 1591
Weight500–5000 kgPer end truck; affects shipping and installation.

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Wheel Assembly
    Provides rolling contact with runway rails for horizontal movement
    Material: Forged steel or cast steel
  • Drive Motor Mounting Part
    Supports and positions the drive motor for power transmission to wheels
    Material: Structural steel
  • Brake Assembly
    Provides controlled stopping and holding capability for the crane
    Material: Steel with friction materials
  • Wheel Bearing Housing
    Contains and supports wheel bearings for smooth rotation
    Material: Cast steel or fabricated steel
  • Drive Motor
    Drives the wheels to traverse the crane along the runway.
  • Wheel Bearings
    Let the wheels turn under the full bridge and load weight.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Material Handling Crane
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Gantry Crane
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Portal Crane
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Overhead Crane
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Bridge Crane
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Gantry Frame
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Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: N/A (structural component, not pressure vessel)
other spec: Max wheel load capacity: 10-500 tons (depending on configuration), Bridge span: 5-50 meters, Travel speed: 10-60 m/min
temperature: -20°C to +60°C
Media Compatibility
✓ Indoor industrial environments (manufacturing plants) ✓ Outdoor sheltered applications (warehouses with roofing) ✓ Heavy machinery workshops
Unsuitable: Marine/coastal environments with high salt spray corrosion
Sizing Data Required
  • Total bridge load (including crane, hoist, and maximum lifted load)
  • Required bridge span between runway rails
  • Desired travel speed and acceleration/deceleration requirements

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Wheel bearing seizure
Cause: Inadequate lubrication, contamination ingress, or excessive loading leading to overheating and metal-to-metal contact
Structural cracking in the mast or frame
Cause: Fatigue from cyclic loading, material defects, or impact damage from collisions or overloading
Maintenance Indicators
  • Unusual grinding or squealing noises from the wheel assembly during operation
  • Visible cracks, deformation, or excessive wear on the mast, forks, or structural welds
Engineering Tips
  • Implement a strict lubrication schedule using manufacturer-recommended greases and monitor bearing temperatures with infrared thermography
  • Conduct regular non-destructive testing (e.g., magnetic particle or ultrasonic inspection) on high-stress areas and enforce load limits to prevent overloading

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ISO 12488-1: Cranes - Tolerances for wheels and travel and traversing tracks ANSI/ASME B30.11: Monorails and Underhung Cranes DIN 15018-1: Cranes - Principles for steel structures; stress analysis

Quoted from the published standard.

Manufacturing Precision
  • Wheel tread diameter: +/-0.5mm
  • Axle bore alignment: 0.1mm per 100mm length
Quality Inspection
  • Magnetic Particle Inspection for weld integrity
  • Dimensional verification with CMM (Coordinate Measuring Machine)

Manufacturers of End Trucks

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Frequently Asked Questions

What are end trucks used for in an overhead crane?

End trucks are structural components at the ends of the crane bridge. They support the bridge girders and house the wheel assemblies that allow the crane to travel horizontally along the runway rails. They transfer the crane's load to the runway system and provide mounting for drive and braking components.

What are the key parameters to consider when selecting end trucks?

Key parameters include rated load capacity, span, wheel diameter, wheel base, rail gauge, maximum wheel load, travel speed, motor power, operating temperature, ingress protection, material grade, and weight. These must be matched to the crane design and runway specifications, and verified with the manufacturer.

How do end trucks affect crane stability and performance?

End trucks distribute the crane's load to the runway rails. Proper wheel base and rail gauge ensure even load distribution and stability. The wheel diameter and material grade affect load capacity and durability. Travel speed and motor power determine movement efficiency. Incorrect selection can lead to excessive wear, instability, or structural failure.

What maintenance signals indicate end truck problems?

Unusual noise, vibration, or uneven wear on wheels or rails can indicate misalignment, bearing wear, or overloading. Regular inspection of wheel flanges, axles, and mounting bolts is recommended. If any abnormal conditions are observed, consult the manufacturer or a qualified engineer.
Data basis: editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

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