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Radial Arms Component – Machinery and Equipment Manufacturing

Component Specifications

Definition

Radial arms are rigid structural members that radiate from a central hub or shaft in spider assemblies, designed to provide precise radial positioning, load distribution, and support for attached components such as rollers, gears, or cutting tools. They maintain alignment under operational stresses and ensure balanced force transmission in rotating machinery.

Working Principle

Radial arms operate by transferring torque and radial loads from a central rotating hub to peripheral components, maintaining fixed angular positions through rigid construction. They distribute forces evenly to prevent imbalance and vibration, while allowing for adjustable or fixed mounting of machine elements along their length.

Materials

Typically manufactured from high-strength alloy steel (e.g., AISI 4140), stainless steel (e.g., 304/316), or aluminum alloys (e.g., 6061-T6) for lightweight applications. Heat treatment (quenching and tempering) is common for enhanced durability and fatigue resistance.

Technical Parameters

Length 150-500 mm
Cross-section Rectangular or I-beam
Load Capacity 500-5000 N
Mounting Holes M8-M16 threaded
Surface Finish Ra 3.2 μm or better

Standards

ISO 2768, DIN 7186

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Radial Arms.

Parent Products

This component is used in the following industrial products

Spider Assembly

A structural component within a control rod assembly that provides radial support and positioning for control rod fingers or blades.

View Product Details

Engineering Analysis

Risks & Mitigation

Fatigue failure from cyclic loading
Misalignment causing vibration
Corrosion in harsh environments

FMEA Triads

Trigger: Material fatigue due to high cyclic stresses
Failure: Crack propagation leading to arm fracture
Mitigation: Implement regular non-destructive testing (e.g., ultrasonic inspection) and use fatigue-resistant materials with proper heat treatment.

Trigger: Improper installation or mounting bolt loosening
Failure: Arm misalignment causing imbalance and vibration
Mitigation: Use torque-controlled fastening and periodic alignment checks with laser tools.

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance

±0.1 mm on critical dimensions

Test Method

Static load testing per ISO 12100, dynamic fatigue testing per ASTM E466

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 a radial arm in a spider assembly?

The radial arm provides structural support and precise radial positioning for components attached to a central hub, ensuring balanced load distribution and minimizing vibration in rotating systems.

Can radial arms be customized for specific machinery?

Yes, radial arms are often custom-designed based on load requirements, space constraints, and material compatibility, with adjustments in length, cross-section, and mounting features.

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.

Radial Arms