Structured Manufacturing Data (2026)

Telescopic Sections (for telescopic booms)

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Telescopic Sections (for telescopic booms) used in the Machinery and Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Telescopic Sections (for telescopic booms) is characterized by the integration of Wear Pad / Slide Block and Seal / Wiper. In industrial production environments, manufacturers listed on CNFX commonly emphasize High-strength steel (e.g., Weldox, Hardox) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

Nested cylindrical or box-section components that extend and retract to adjust the length of a telescopic boom.

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Product Specifications

Technical details and manufacturing context for Telescopic Sections (for telescopic booms)

Definition
Telescopic sections are the individual, concentrically arranged segments that form the extendable structure of a telescopic boom. They slide within one another, typically using hydraulic cylinders or other actuators, to provide variable reach and lifting height for equipment such as cranes, aerial work platforms, and material handlers. As part of the Main Boom, they are critical for the machine's operational flexibility and range.
Working Principle
Multiple sections (typically 2-5) are nested, with the smallest section innermost. A hydraulic cylinder or chain system attached to the base or an inner section provides the force to extend or retract the sections sequentially or simultaneously, guided by wear pads, rollers, or sliding surfaces to ensure smooth, aligned movement and structural stability under load.
Common Materials
High-strength steel (e.g., Weldox, Hardox), Aluminum alloy (for lighter booms)
Technical Parameters
  • Outer dimensions (width/height, diameter), wall thickness, and length of each individual section, defining the nested profile and total extended length. (mm) Standard Spec
Components / BOM
  • Wear Pad / Slide Block Part
    Reduces friction and wear between sliding sections, ensuring smooth extension/retraction and alignment.
    Material: UHMW-PE, nylon, or bronze composite
  • Seal / Wiper Part
    Prevents ingress of dirt, moisture, and debris into the space between sections to protect sliding surfaces and internal components.
    Material: Rubber or polyurethane
  • Lifting Lug / Attachment Point Part
    Provides a connection point for the hydraulic cylinder, chain, or cable that drives the section's movement.
    Material: Steel

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Telescopic Sections (for telescopic booms).

Telescopic Stages Boom Sections Extendable Sections telescopic boom sections for sale high-strength steel telescopic components aluminum alloy telescopic boom parts telescopic sections with wear pads custom telescopic boom cylinder sections

Applied To / Applications

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

Main Boom
View system integration details

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 300 bar (hydraulic systems)
other spec: Max extension ratio: 4:1, Min retracted length: 1.5m, Max extended length: 20m
temperature: -40°C to +120°C
Media Compatibility
✓ Hydraulic oil (ISO VG 46) ✓ Compressed air (dry, filtered) ✓ Water-based lubricants
Unsuitable: Abrasive slurries with >5% solids concentration
Sizing Data Required
  • Required extended length (m)
  • Maximum load moment (kN·m)
  • Operating pressure (bar)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Seal degradation and hydraulic fluid leakage
Cause: Contamination ingress (dust, debris), improper seal material selection for operating conditions, or excessive pressure/temperature causing seal hardening or extrusion
Structural fatigue and binding
Cause: Misalignment during extension/retraction cycles, inadequate lubrication on sliding surfaces, or overloading beyond design capacity leading to deformation
Maintenance Indicators
  • Visible hydraulic fluid streaks or drips along telescopic sections during operation
  • Audible grinding, scraping, or uneven jerking motion during extension/retraction cycles
Engineering Tips
  • Implement regular contamination control: Use high-quality filters in hydraulic systems, maintain clean work environments during maintenance, and establish scheduled seal inspections/replacements based on operating hours.
  • Ensure proper alignment and lubrication: Conduct periodic alignment checks using laser tools, apply manufacturer-recommended lubricants to sliding surfaces, and train operators on smooth, controlled extension/retraction to minimize shock loads.

Compliance & Manufacturing Standards

Reference Standards
ISO 4309:2010 (Cranes - Wire ropes - Care, maintenance, installation, examination and discard) ANSI/ASME B30.5 (Mobile and Locomotive Cranes) DIN EN 13001-3-1 (Crane safety - General design - Part 3-1: Limit states and proof of competence of steel structure)
Manufacturing Precision
  • Bore diameter tolerance: +/-0.05mm
  • Section parallelism: 0.15mm per meter length
Quality Inspection
  • Magnetic Particle Inspection (MPI) for surface cracks
  • Ultrasonic Testing (UT) for internal material flaws

Factories Producing Telescopic Sections (for telescopic booms)

Manufacturer profiles with relevant production capability in China

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What materials are used for telescopic sections in booms?

Telescopic sections are typically made from high-strength steel like Weldox or Hardox for durability, or aluminum alloy for lighter weight applications where reduced load is beneficial.

What components are included in telescopic section assemblies?

Key components include lifting lugs or attachment points for connection, seals or wipers to prevent contamination, and wear pads or slide blocks to reduce friction during extension and retraction.

How do telescopic sections extend and retract in booms?

Telescopic sections use nested cylindrical or box-section designs that slide within one another, allowing controlled extension to increase reach and retraction for compact storage or transport.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data basis: CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks for Machinery and Equipment Manufacturing.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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