Alignment Ring: Parallelism ≤ 0.01 mm, ID_tolerance H7

Component Specifications

Definition

A precision-machined annular component designed to ensure accurate concentric alignment between the die holder and press ram in stamping, molding, or forming machinery. It eliminates radial play and maintains consistent tooling position during high-cycle operations.

Working Principle

Utilizes interference fit or precise clearance with mating surfaces to create a rigid mechanical interface that restricts lateral movement while allowing axial force transmission. The ring's geometric accuracy ensures the die holder remains perfectly centered relative to the press axis.

Materials

High-carbon tool steel (AISI D2/D3), hardened to 58-62 HRC with surface finish Ra ≤ 0.8 μm. Alternative: Tungsten carbide for extreme wear applications.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Parallelism	≤ 0.01 mm
ID Tolerance	H7
OD Tolerance	h6
Concentricity	≤ 0.005 mm
Surface Hardness	≥ 58 HRC
Thermal Stability	≤ 0.002 mm/100°C

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 7154

Parent Products

This component is used in the following industrial products

Die Holder

A mechanical component in an extrusion press that securely clamps and positions the extrusion die during the metal forming process.

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Engineering Analysis

Risks & Mitigation

Concentricity loss causing part defects
Fatigue cracking under cyclic loading
Gallering from improper lubrication

FMEA Triads

Trigger: Insufficient hardness gradient
Failure: Premature wear and loss of concentricity
Mitigation: Implement deep cryogenic treatment during hardening process

Trigger: Thermal expansion mismatch
Failure: Binding during operation cycles
Mitigation: Select materials with matched CTE or design controlled clearance fits

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

ISO 2768-mK for general dimensions, ISO 1101 for geometric tolerances

Test Method

CMM verification per ISO 10360-2, surface roughness per ISO 4287

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 Alignment Ring

Manufacturer profiles associated with Alignment Ring.

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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 causes alignment ring wear in high-cycle applications?

Micro-fretting from cyclic radial loads, abrasive contamination, or thermal expansion mismatches between ring and holder materials.

How often should alignment rings be inspected?

Every 50,000 cycles for preventive measurement of concentricity and surface wear, with replacement recommended at 0.02 mm dimensional deviation.

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.

Alignment Ring