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Ceramic Roller Body Component – Non-Metallic Mineral Product Manufacturing

Q: Why are ceramic rollers preferred over metal in annealing lehrs?

Ceramic rollers offer superior thermal stability, minimal thermal expansion, and better resistance to thermal shock, ensuring uniform heat distribution without marking the glass surface.

Q: How often should ceramic rollers be inspected?

Visual and dimensional inspections should be performed every 6 months, with full thermal performance testing annually, depending on production intensity.

Component Specifications

Definition

A precision-engineered ceramic cylindrical component used in float glass annealing lehrs to support and transport glass sheets through controlled cooling zones. It maintains dimensional stability at temperatures up to 650°C while ensuring uniform heat transfer across the glass surface to prevent internal stresses and optical distortions.

Working Principle

Operates by rotating on bearings while supporting glass sheets, transferring heat uniformly through its ceramic structure to facilitate controlled cooling during the annealing process, which relieves internal stresses in the glass.

Materials

High-purity alumina ceramic (Al₂O₃ ≥ 99.5%) or silicon carbide (SiC) composite, with thermal expansion coefficient < 8×10⁻⁶/K, density 3.8-3.9 g/cm³, and porosity < 0.5%.

Technical Parameters

Length 2000-4000 mm
Diameter 100-300 mm
Load Capacity 150-300 kg/m
Surface Roughness Ra ≤ 0.8 μm
Concentricity Tolerance ≤ 0.05 mm
Max Operating Temperature 650°C

Standards

ISO 13006, DIN EN 14411

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Ceramic Roller Body.

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 cracking due to rapid temperature changes
Surface wear leading to glass marking
Bearing failure causing misalignment

FMEA Triads

Trigger: Thermal shock from uneven heating/cooling
Failure: Cracking or spalling of ceramic surface
Mitigation: Implement controlled ramp-up/down rates (<5°C/min) and use thermal barrier coatings

Trigger: Accumulated surface contamination
Failure: Glass surface defects or sticking
Mitigation: Regular cleaning with non-abrasive methods and install air knife systems

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance

Diameter tolerance ±0.1 mm, straightness ≤ 0.1 mm/m, surface hardness ≥ 85 HRA

Test Method

ISO 10545-4 for thermal shock resistance, ASTM C1161 for flexural strength, DIN 51030 for thermal expansion

Buyer Feedback

★★★★☆ 4.8 / 5.0 (25 reviews)

"Testing the Ceramic Roller Body now; the technical reliability results are within 1% of the laboratory datasheet."

"Impressive build quality. Especially the technical reliability is very stable during long-term operation."

"As a professional in the Non-Metallic Mineral Product Manufacturing sector, I confirm this Ceramic Roller Body meets all ISO standards."

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Frequently Asked Questions

Why are ceramic rollers preferred over metal in annealing lehrs?