Arm Body / Structure: Weight Capacity 5-500 kg

Component Specifications

Definition

The arm body or structure is the primary load-bearing component of a tool exchange arm in industrial automation systems. It serves as the mechanical skeleton that houses and supports the arm's internal mechanisms, including motors, gears, bearings, and the tool interface. This component determines the arm's reach, payload capacity, stiffness, and overall durability. It is engineered to withstand repetitive motion cycles, mechanical stresses, and environmental conditions while maintaining precise alignment for accurate tool positioning.

Working Principle

The arm body functions as a rigid structural member that transfers forces from the drive system to the tool interface. It provides a stable platform for mounting all internal components while maintaining geometric accuracy through precision machining and material selection. The structure's design minimizes deflection under load to ensure repeatable positioning accuracy during tool exchange operations.

Materials

Typically manufactured from high-strength aluminum alloys (e.g., 6061-T6, 7075-T6) for lightweight applications, or steel alloys (e.g., AISI 4140, stainless steel 304/316) for heavy-duty applications. May include composite materials or cast iron for specific requirements.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Reach	500-3000 mm
Stiffness	50-500 N/μm
Repeatability	±0.01-0.1 mm
Weight Capacity	5-500 kg
Protection Rating	IP54-IP67
Operating Temperature	-10°C to 60°C

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

Standards

ISO 9283, ISO 10218-1, DIN EN ISO 8373, ANSI/RIA R15.06

Parent Products

This component is used in the following industrial products

Tool Exchange Arm

Mechanical arm component of an Automatic Tool Changer (ATC) responsible for physically transferring tools between the machine spindle and tool magazine.

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Engineering Analysis

Risks & Mitigation

Structural fatigue from cyclic loading
Corrosion in harsh environments
Thermal expansion affecting accuracy
Impact damage from collisions
Misalignment due to wear or improper installation

FMEA Triads

Trigger: Material fatigue from repetitive stress cycles
Failure: Crack formation leading to structural failure
Mitigation: Regular non-destructive testing, proper load calculations, and using materials with appropriate fatigue strength

Trigger: Corrosive environment exposure
Failure: Material degradation and reduced structural integrity
Mitigation: Use corrosion-resistant materials, protective coatings, and environmental controls

Trigger: Improper installation or alignment
Failure: Reduced accuracy and premature wear of components
Mitigation: Follow precise installation procedures, use alignment tools, and perform regular calibration checks

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Geometric tolerances per ISO 1101, dimensional tolerances IT6-IT8, surface finish Ra 0.8-3.2 μm

Test Method

Dimensional inspection with CMM, load testing per ISO 9283, vibration analysis, finite element analysis validation

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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Manufacturers of Arm Body / Structure

Manufacturer profiles associated with Arm Body / Structure.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the primary function of the arm body in a tool exchange system?

The arm body provides the structural integrity and mounting platform for all other components, ensuring precise alignment and stable operation during tool exchange cycles.

How does material selection affect arm body performance?

Material selection determines weight, stiffness, corrosion resistance, and thermal stability. Aluminum offers lightweight solutions, while steel provides higher strength and durability for heavy payloads.

What maintenance is required for the arm body structure?

Regular inspection for cracks, deformation, or corrosion; cleaning of mounting surfaces; verification of alignment; and torque checks on fasteners according to manufacturer specifications.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

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.

Arm Body / Structure