INDUSTRY COMPONENT

Internal Ducting

Internal ducting for articulated arm sections that routes air, coolant, or hydraulic fluid through robotic joints while maintaining flexibility and leak resistance.

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Component Specifications

Definition
Internal ducting is a specialized flexible conduit system integrated within articulated arm sections of industrial machinery, designed to transport air, hydraulic fluid, coolant, or other media through moving joints without external exposure. It enables continuous media flow during arm articulation, preventing hose entanglement and protecting media lines from environmental damage. Key features include multi-axis flexibility, pressure resistance, abrasion protection, and compatibility with robotic motion cycles.
Working Principle
Operates by using flexible, reinforced tubing or corrugated conduits that bend and twist within the arm's hollow sections as joints articulate. The ducting maintains a sealed pathway for media transfer, often incorporating swivel joints or rotary unions at pivot points to allow continuous flow during rotation. It minimizes stress on connections through controlled bend radii and strain relief, ensuring media integrity across the arm's range of motion.
Materials
Typically constructed from polyurethane, thermoplastic elastomers (TPE), or reinforced rubber for flexibility, with internal layers of nylon, polyethylene, or PTFE for media compatibility. Reinforcement may include stainless steel braiding, aramid fibers, or textile spirals for pressure resistance. Fittings are often stainless steel (AISI 304/316) or aluminum with NBR or FKM seals.
Technical Parameters
  • Flex Life >1 million cycles
  • Bend Radius 4x diameter minimum
  • Inner Diameter 6-25 mm
  • Pressure Rating Up to 25 bar
  • Temperature Range -40°C to +120°C
  • Media Compatibility Air, water, hydraulic oil, coolants
Standards
ISO 18752, DIN 20018, ISO 11425

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Internal Ducting.

internal ducting articulated arm duct flexible conduit robotic hose hydraulic ducting coolant lines industrial hose machinery ducting Internal Ducting in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Articulated Arm Sections

Segmented components that form the flexible arm structure of extraction hoods/arms, enabling adjustable positioning for fume capture.

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Engineering Analysis

Risks & Mitigation
  • Leakage at joints
  • Abrasion from internal surfaces
  • Fatigue failure from cyclic bending
  • Media incompatibility causing degradation
  • Over-pressurization leading to burst
FMEA Triads
Trigger: Improper bend radius during installation
Failure: Premature cracking or kinking of ducting
Mitigation: Follow manufacturer bend radius guidelines; use bend restrictors if needed
Trigger: Incompatible media causing chemical degradation
Failure: Internal layer deterioration leading to leaks
Mitigation: Verify media compatibility with material specs; use lined ducting if required
Trigger: Excessive cyclic stress at pivot points
Failure: Fatigue failure of reinforcement layers
Mitigation: Incorporate swivel joints; ensure proper strain relief; monitor flex life cycles

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.5 mm on inner diameter; leak rate <0.1% of flow rate at rated pressure
Test Method
Pressure cycling test per ISO 18752; flex life test per DIN 20018; burst pressure test

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

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 is the primary function of internal ducting in articulated arms?

To safely route air, hydraulic fluid, or coolant through moving joints without external exposure, preventing hose entanglement and protecting media lines from damage during operation.

How does internal ducting differ from external hoses?

Internal ducting is integrated within the arm structure, offering protection from environmental factors and mechanical interference, while external hoses are exposed and prone to snagging or wear.

What materials are best for high-flexibility applications?

Polyurethane or thermoplastic elastomers with stainless steel braiding provide excellent flexibility, pressure resistance, and durability for dynamic motion.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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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