INDUSTRY COMPONENT

Spacer Ring

A precision spacer ring used in disc stack assemblies to maintain precise axial spacing between rotating discs.

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Component Specifications

Definition
A spacer ring is a critical component in disc stack assemblies that provides controlled axial separation between adjacent discs. It ensures proper alignment, prevents contact between rotating elements, and maintains operational clearances under thermal and mechanical loads. These rings are manufactured to tight tolerances to guarantee consistent performance in high-speed rotating machinery.
Working Principle
The spacer ring functions by occupying a fixed axial space between discs in a stack, creating precise gaps for fluid flow, thermal expansion accommodation, or mechanical separation. It distributes axial loads evenly across the disc stack while maintaining rotational balance and preventing disc deflection during operation.
Materials
Typically manufactured from high-strength alloy steel (AISI 4140/4340), stainless steel (316/304), aluminum alloys (6061-T6), or engineered polymers (PEEK, PTFE) depending on application requirements for strength, corrosion resistance, and thermal properties.
Technical Parameters
  • Hardness HRC 28-45 (steel)
  • Thickness 1-25 mm
  • Parallelism ±0.005 mm
  • Inner Diameter 30-450 mm
  • Outer Diameter 50-500 mm
  • Surface Finish Ra 0.8-3.2 μm
  • Flatness Tolerance ±0.01 mm
Standards
ISO 286-2, DIN 7150, ISO 2768-mK

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Spacer Ring.

spacer ring disc stack spacer axial spacing component precision shim machine spacing ring industrial separator ring rotating equipment spacer Spacer Ring in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Disc Stack

A stack of conical discs within a separation bowl that provides the surface area for centrifugal separation of immiscible liquids or solids from liquids.

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Engineering Analysis

Risks & Mitigation
  • Incorrect thickness causing misalignment
  • Material fatigue under cyclic loading
  • Thermal expansion mismatch
  • Corrosion in harsh environments
  • Installation damage during assembly
FMEA Triads
Trigger: Incorrect thickness specification
Failure: Disc stack misalignment leading to vibration and premature bearing wear
Mitigation: Implement dimensional verification with calibrated measuring instruments and statistical process control
Trigger: Material selection error for operating environment
Failure: Corrosion or thermal deformation causing loss of dimensional stability
Mitigation: Conduct thorough application analysis including temperature, chemical exposure, and load requirements
Trigger: Improper installation technique
Failure: Damage to ring or adjacent components during assembly
Mitigation: Develop standardized assembly procedures with torque specifications and alignment tools

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
ISO 286-2 medium tolerance for diameters, ISO 2768-mK for general dimensions
Test Method
Dimensional verification with CMM, surface roughness testing per ISO 4287, material certification per ASTM/EN standards

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 spacer ring in disc stacks?

The primary function is to maintain precise axial distance between adjacent discs, ensuring proper clearances for operation, thermal expansion, and preventing mechanical interference.

How do I select the right material for a spacer ring?

Material selection depends on operating conditions: alloy steel for high strength, stainless for corrosion resistance, aluminum for lightweight applications, and engineered polymers for chemical resistance or electrical insulation.

What tolerances are critical for spacer ring performance?

Thickness tolerance (±0.01 mm typically), flatness, and parallelism are most critical as they directly affect disc alignment and stack compression.

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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Spacer Grid Spacer/Shim