Ceramic Sphere: Density 3.2-3.3 g/cm³ (Si3N4)

Component Specifications

Definition

A ceramic sphere is a precision-engineered spherical component manufactured from advanced ceramic materials, primarily silicon nitride (Si3N4) or zirconia (ZrO2), designed to serve as the rolling element in hybrid ceramic bearings. These spheres exhibit exceptional hardness, corrosion resistance, and thermal stability, making them suitable for high-speed, high-temperature, and chemically aggressive environments where traditional steel balls would degrade.

Working Principle

Operates as a rolling element within bearing assemblies, reducing friction between rotating surfaces by facilitating smooth rotational motion through point contact. In hybrid ceramic bearings, ceramic spheres roll between steel races, minimizing wear, heat generation, and vibration due to their superior material properties.

Materials

Silicon Nitride (Si3N4) - Grade 3 or equivalent; Zirconia (ZrO2) - Yttria-stabilized; Aluminum Oxide (Al2O3) for specific applications. Material must meet ASTM F2094 or equivalent standards for bearing-grade ceramics.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Density	3.2-3.3 g/cm³ (Si3N4)
Hardness	HV 1500-1800 (Si3N4)
Sphericity	≤0.00005 inches (≤0.00127 mm)
Surface Roughness	Ra ≤ 0.02 μm
Diameter Tolerance	±0.0001 inches (±0.0025 mm)
Compressive Strength	≥3000 MPa
Maximum Operating Temperature	800°C (Si3N4)

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 3290-1, DIN 5401, ABMA Std 10, ASTM F2094

Parent Products

This component is used in the following industrial products

Ceramic Bearing Ball

A high-precision ceramic sphere manufactured as a rolling element for industrial bearings.

View Product Details

Engineering Analysis

Risks & Mitigation

Brittle fracture under impact loading
Thermal shock susceptibility
Higher initial cost compared to steel
Compatibility issues with improper lubrication

FMEA Triads

Trigger: Improper handling during installation causing impact damage
Failure: Crack propagation leading to catastrophic bearing failure
Mitigation: Use specialized installation tools, follow manufacturer handling procedures, implement visual inspection protocols

Trigger: Thermal expansion mismatch with steel races
Failure: Increased clearance or preload variation affecting precision
Mitigation: Design with appropriate clearance calculations, use compatible ceramic/steel combinations, control operating temperature range

Trigger: Contamination from improper cleaning or lubrication
Failure: Surface pitting and accelerated wear
Mitigation: Implement cleanroom assembly procedures, use compatible high-purity lubricants, establish contamination control protocols

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Grade 3 per ISO 3290-1 (Diameter variation ≤ 0.13 μm, Sphericity deviation ≤ 0.13 μm)

Test Method

Coordinate measuring machine (CMM) verification, laser interferometry for sphericity, surface profilometry for roughness, Rockwell hardness testing

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 Ceramic Sphere

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

FBelec

Dongguan, Guangdong, CN

Also makes: Ultrasonic Sensor, AC-DC Converter, Ultrasonic Transducer and 9 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 are the main advantages of ceramic spheres over steel balls in bearings?

Ceramic spheres offer superior hardness (reducing wear), lower density (reducing centrifugal force at high speeds), excellent corrosion resistance, higher temperature tolerance, and electrical insulation properties compared to steel balls.

What industries commonly use ceramic bearing spheres?

Aerospace, medical equipment, semiconductor manufacturing, high-performance automotive, machine tool spindles, and chemical processing industries where high-speed, precision, and harsh environment operation is required.

How are ceramic spheres manufactured to achieve required precision?

Through processes including powder pressing, sintering, diamond grinding, and precision lapping with specialized equipment to achieve sub-micron tolerances and superior surface finishes.

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.

Ceramic Sphere