Metal Shaft: Diameter Tolerance ±0.01 mm

Component Specifications

Definition

A critical rotating component in float glass annealing lehr roller systems, engineered to support and transfer glass sheets through controlled cooling zones. This shaft maintains precise alignment under continuous thermal cycling (typically 200-600°C) while minimizing deflection and wear. It features specialized surface treatments and dimensional tolerances to ensure consistent glass quality by preventing surface marking or thermal distortion during the annealing process.

Working Principle

Operates as a load-bearing and rotational element within roller assemblies, transmitting torque while maintaining structural integrity under thermal stress. The shaft's thermal expansion characteristics are carefully matched to roller materials to prevent binding or misalignment during temperature fluctuations in annealing zones.

Materials

High-temperature alloy steel (e.g., AISI 304/316 stainless steel or Inconel alloys for extreme conditions), with optional ceramic coatings for enhanced wear resistance. Material selection prioritizes creep resistance, oxidation stability, and thermal conductivity properties.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Hardness	HRC 45-55 (core), HRC 60+ (surface treated)
Length Range	500-4000 mm (customizable)
Surface Roughness	Ra ≤ 0.4 μm
Diameter Tolerance	±0.01 mm
Straightness Tolerance	0.02 mm/m
Maximum Operating Temperature	650°C
Thermal Expansion Coefficient	Match to roller material (±10%)

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 1101

Parent Products

This component is used in the following industrial products

Float Glass Annealing Lehr Roller

A precision ceramic roller used to transport and support glass sheets through the annealing lehr.

View Product Details

Engineering Analysis

Risks & Mitigation

Thermal fatigue cracking
Bearing seizure due to misalignment
Surface degradation from glass particulate abrasion
Creep deformation under sustained load at high temperatures

FMEA Triads

Trigger: Inadequate thermal expansion matching between shaft and roller
Failure: Roller binding or excessive wear leading to glass surface defects
Mitigation: Precise material selection and thermal expansion coefficient verification during design phase

Trigger: Improper installation alignment
Failure: Premature bearing failure and vibration transmission to glass surface
Mitigation: Implement laser alignment procedures during installation and regular alignment checks

Trigger: Insufficient lubrication at high temperatures
Failure: Increased friction, heat generation, and potential seizure
Mitigation: Use high-temperature compatible lubricants and establish automated lubrication monitoring systems

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Geometric tolerances per ISO 1101, dimensional tolerances per ISO 286-2

Test Method

Non-destructive testing (ultrasonic/eddy current), thermal cycling tests, surface roughness verification 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

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

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Manufacturers of Metal Shaft

Manufacturer profiles associated with Metal Shaft.

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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 makes these shafts suitable for float glass annealing applications?

They are engineered with specific thermal expansion properties, high-temperature materials, and precision tolerances to prevent glass surface defects during controlled cooling processes.

How often should annealing lehr shafts be inspected or replaced?

Regular inspection every 6-12 months is recommended, with replacement typically needed after 3-5 years depending on operating conditions, thermal cycles, and maintenance practices.

Can these shafts be customized for different glass production lines?

Yes, they can be engineered with specific diameters, lengths, material grades, and surface treatments to match particular annealing lehr configurations and glass thickness requirements.

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.

Metal Shaft