Radial Arms: Load Capacity 500-5000 N, Length 150-500 mm

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

Parameter	Typical range	Notes & selection driver
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

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 2768, DIN 7186

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

Typical Suppliers & Equivalents

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

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 Radial Arms

Manufacturer profiles associated with Radial Arms.

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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 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.

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.

Radial Arms