INDUSTRY COMPONENT

Radial Arms

Radial arms are structural components in spider assemblies that extend outward from a central hub to support and position machine elements.

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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.

radial arm spider assembly mechanical component load distribution industrial machinery power transmission radial support Radial Arms Radial Arms in Machinery and Equipment Manufacturing

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.

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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

Buyer Feedback

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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.

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