Si₃N₄ ADVANCED CERAMIC

Silicon Nitride Ceramic Balls

Lightweight, high-hardness ceramic balls for hybrid bearings, high-speed spindles, electrical isolation and demanding precision systems.

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Black silicon nitride ceramic balls for hybrid bearings high-speed systems and electrical insulation — PRODUCT REFERENCE / FINAL SPECIFICATION BY QUOTATION

PRODUCT OVERVIEW

What are silicon nitride ceramic balls?

Silicon nitride balls are advanced ceramic rolling elements engineered for precision systems where steel can be limited by mass, electrical conductivity, magnetic response, corrosion or high-speed heat generation.

Their combination of low density, high hardness, wear resistance, electrical insulation and thermal-shock resistance makes Si₃N₄ a leading material for hybrid ceramic bearings and high-speed equipment.

TECHNICAL SPECIFICATIONS

Start with measurable requirements.

Values below are product-family references. The quotation, drawing, agreed standard and inspection plan control the final supply specification.

Technical itemReference specification

MaterialSilicon nitride / Si₃N₄ advanced ceramic

Diameter Range1–200 mm; availability depends on precision and quantity

Precision GradeISO 3290-2; final grade by project

ToleranceControlled by the agreed precision grade, drawing or purchase specification

HardnessHV 1400–1600 reference range

DensityApprox. 3.26 g/cm³

Surface FinishPrecision ground and polished ceramic

Roundness / SphericityControlled according to the agreed precision grade and inspection method

Temperature ResistanceUp to 1200°C in suitable compatible service; application review required

Chemical ResistanceConfirm exact fluid, concentration, temperature and exposure time

PackagingBulk, small-quantity, container, bag, carton, export pallet or customized packing

Elastic modulusApprox. 300 GPa reference

MagnetismNon-magnetic

Electrical behaviorExcellent electrical insulation

PRODUCT SELECTION GUIDANCE

Compare materials before substituting.

Material selection affects load, wear, corrosion, temperature, precision, service life and total program cost.

Material optionPrimary advantageLimitationBest fit

Silicon nitride / Si₃N₄Low density, high hardness, insulation and thermal-shock resistanceHigher cost and ceramic impact considerationsHybrid bearings, spindles and electrical isolation

Zirconia / ZrO₂High toughness and smooth wear behaviorHigher density and lower temperature capability than Si₃N₄Valves, grinding and corrosion-sensitive contact

Alumina / Al₂O₃Hard, chemically stable and economical ceramicLower toughness than Si₃N₄Grinding, valves and insulation

AISI 52100 steelEstablished bearing performance and lower costHeavier, magnetic and electrically conductiveConventional lubricated bearings

KEY PERFORMANCE FEATURES

Performance that purchasing teams can verify.

Reduced rotating mass

Lower density than steel can reduce centrifugal force and frictional heat in high-speed bearing systems.

Electrical insulation

Ceramic rolling elements can help limit current passage through hybrid bearing assemblies.

High hardness & wear resistance

Supports precision contact and long service when load, lubrication and assembly are correctly engineered.

Non-magnetic stability

Useful for instruments, medical, aerospace and electrically sensitive equipment.

TYPICAL APPLICATIONS

Specify the work the ball must perform.

Application names are starting points—not approval of universal suitability. Share the real medium, load, speed, pressure, temperature, life target and compliance needs.

Hybrid ceramic bearings

Electric motors, generators and systems requiring steel races with insulating ceramic balls.

High-speed spindles

Machine-tool, compressor and centrifugal equipment where lower ball mass is valuable.

Vacuum pumps & instruments

Precision mechanisms benefiting from non-magnetic and corrosion-resistant behavior.

Aerospace & advanced motion

Specialized assemblies requiring weight reduction, temperature stability and controlled precision.

Typical applications for Silicon Nitride Ceramic Balls — REPRESENTATIVE APPLICATION ENVIRONMENTS

QUALITY & DOCUMENTATION

Build the evidence into the purchase order.

Document requirements should be defined before quotation so the inspection method, sampling level, traceability and external testing can be planned correctly.

Material verification against the agreed grade or material specification
Dimension inspection for diameter and agreed tolerance
Hardness testing when applicable to the selected material
Surface finish inspection against the agreed visual or roughness requirement
Roundness / sphericity inspection for the specified precision level
Batch traceability through lot identification and controlled records
Material certificates available when agreed before quotation
Inspection reports, compliance documents and third-party testing by agreement

PACKAGING OPTIONS

Protect precision through delivery.

Final packing depends on material, diameter, surface sensitivity, order weight, storage time and destination.

Clean vials or trays

Size- and grade-separated protective packing for samples and precision lots.

Individual cavity packing

Recommended for larger diameters or critical surface requirements.

Cleanroom-compatible options

Cleaning and packing level can be discussed for controlled assemblies.

Export cartons & pallets

Shock-protected outer packing for international shipment.

Supported formats: bulk packaging · small-quantity packaging · plastic containers · bags · cartons · export pallets · customized packaging.

SMALL QUANTITY & SAMPLE ORDERS

Validate before you scale.

SDBALLS Industry Corp. supports North American customers with sample quantities, prototype requirements, testing programs and specialty ball inquiries.

Engineering samples and small qualification lots are available for many sizes and grades. Provide the bearing design, speed, load, lubrication, electrical requirement, target grade and inspection documents for a focused review.

PrototypeTestingRepairR&DSmall batch production

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PRODUCT FAQ

Answers for engineering and purchasing teams.

Why use silicon nitride balls in a hybrid bearing?

Their lower mass, high hardness and electrical insulation can improve high-speed behavior and help reduce electrical-current damage when the bearing is correctly designed.

Are Si₃N₄ balls lighter than steel?

Yes. Their typical density is about 3.26 g/cm³, substantially below bearing steel.

Are silicon nitride balls electrically conductive?

They are excellent electrical insulators and are widely selected for electrically sensitive bearing systems.

What precision standard applies?

Silicon nitride balls may be specified to ISO 3290-2. The required grade, diameter variation, roundness and surface limits should be agreed.

Can they operate at 1200°C?

That value is a material capability reference under suitable compatible conditions, not a universal bearing operating limit. Assembly design, load, atmosphere, shock and mating materials control the actual limit.

Can I order samples for bearing qualification?

Yes. SDBALLS can discuss sample quantities and reports for engineering validation before production orders.

CONTACT SDBALLS U.S.

Bring us the application and requirement.

Include product, material, size or shot size, grade, hardness, finish, quantity, packaging, application and required documentation for a faster quotation.

SDBALLS Industry Corp.Email: info@sdballs.usWhatsApp: +1 424 351 5470Website: www.sdballs.usNorth American Business Support