Spacer Ring: Inner Diameter 30-450 mm, Outer Diameter 50-500 mm

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

Parameter	Typical range	Notes & selection driver
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

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 286-2, DIN 7150, ISO 2768-mK

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

Typical Suppliers & Equivalents

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

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

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Spacer Ring

2 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Landee Industries

Xiamen, Fujian, CN

Founded 1994230+ staff

ASME U-Stamp

Also makes: Butterfly Valve, Heat Exchanger, Valve Actuator and 7 more

Listed on the company's own website · profile compiled by CNFX from public sources

View profile Send enquiry

Epowermetals

Zhejiang, CN

Also makes: Butterfly Valve, Heat Exchanger, Steel Forging and 8 more

Listed on the company's own website · profile compiled by CNFX from public sources

View profile Send enquiry

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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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.

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.

Spacer Ring