★ Flagship · Precision Ceramic Balls

Silicon nitride balls,
G3 to G60.

Si₃N₄ ceramic balls for precision bearings, ball screws, and valve seats. 60% lighter than steel, hardness 78 HRC, non-magnetic, and lubricant-free capable. Grade G3 to G60 in stock. Diameter 0.4mm to 100mm.

G3–G60

Grade Range

Ø 0.4–100mm

Diameter

HRC 78

Hardness

Non-magnetic

Zero Mag. Sig.

Request a Quote →Download Datasheet ↓

Silicon Nitride Balls · At a Glance

MaterialSi₃N₄

Density3.2 g/cm³

HardnessHRC 78

Size RangeØ 0.4–100mm

Grade RangeG3–G60

Surface FinishRa ≤0.01µm

Sample Lead Time48 h

Certifications & Standards

ISO 9001IATF 16949CERoHS · REACHUL Recognized

01 · Grade Tiers

Three grade tiers for every application.

ISO 3290 grade = max allowable deviation in micrometres. Lower grade = tighter tolerance = higher precision. Match grade to your bearing accuracy class.

★ Highest Precision

Precision Grade

G3 / G5 · aerospace & instrument

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G3 ball — microscope view

GradeG3 / G5

Max Deviation0.08 / 0.13µm

Bearing ClassP2 / P4

Size RangeØ 0.4–20mm

SurfaceRa ≤0.008µm

Use: Gyroscopes · aerospace bearings · dental turbines

Engineering Grade

G10 / G16 · CNC & precision

⚙️

G10 ball — production batch

GradeG10 / G16

Max Deviation0.25 / 0.4µm

Bearing ClassP4 / P5

Size RangeØ 0.4–50mm

SurfaceRa ≤0.016µm

Use: CNC spindles · machine tool bearings

Standard Grade

G25 / G40 / G60 · industrial

📦

Standard grade — bulk supply

GradeG25 / G40 / G60

Max Deviation0.6 / 1.0 / 1.5µm

Bearing ClassP5 / P6 / P0

Size RangeØ 1–100mm

ApplicationIndustrial · valve

Use: Industrial bearings · ball screws · valve seats

All Si₃N₄ balls: density 3.2 g/cm³ · hardness HRC 78 · non-magnetic · operating temp −40 to +800°C.

02 · Datasheet & Downloads

Drawings, datasheets, and certs.

Everything your engineering and procurement teams need. Email engineering@ceramitell.com for STEP/DWG files.

📄

Product Datasheet

PDF · full specifications

Download PDF →

📐

2D / 3D Drawings

STEP · DWG · PDF · on request

Request files →

🛡️

Certification Files

ISO 9001 · CE · RoHS · REACH

Request scans →

03 · Certifications & Compliance

Certified for global markets.

All products shipped with certificate of conformity. Additional certification documentation available for OEM qualification programs.

ISO

ISO 9001 quality management system. Full lot traceability and PPAP-level documentation for OEM programs.

Quality System

CE marking for European Union shipments. Declaration of Conformity provided with CE-marked products.

European Union

RoHS

RoHS and REACH compliant. Material declarations available for restricted-substance compliance screening.

EU · Global

IATF

Produced in an IATF 16949 / ISO 9001 facility. PPAP documentation available for automotive-adjacent applications.

Quality System

04 · Get a Quote

Request a quote for Si₃N₄ balls.

Tell us your specification, dimensions, grade, and annual volume. Our engineers reply within one business day with a quote and matched datasheet.

Free samples, 48-hour dispatch on stock items — no MOQ.
Custom to drawing: DFM review in 48h, prototype in 14 days.
Direct manufacturer pricing — no trading layer.
ISO 9001 certified — full material certs with every shipment.

Free Quote · Reply in 24h

Request a quote

Specify diameter (mm), grade (G3/G5/G10/G16/G25/G40/G60), and annual volume.

05 · Engineering FAQ

The questions we get most.

Which grade do I need?

Match to bearing accuracy class: P2→G5, P4→G10–G16, P5→G16–G25, P0→G25–G60. Send bearing model number and we confirm.

What is the minimum order?

No MOQ for samples. Standard sizes in stock dispatch within 48h. Custom sizes below 5mm: 200pc minimum.

How does Si₃N₄ compare to steel balls?

Si₃N₄: 60% lighter (3.2 vs 7.8 g/cm³), harder (HRC 78 vs HRC 60), non-magnetic, runs without lubrication. 3× longer bearing life at high speed vs steel.

What surface finish is available?

Standard: Ra ≤0.01µm (mirror). G3 precision grade: Ra ≤0.008µm. Custom Ra to specification available.

Do you stock all sizes?

Common bearing ball sizes (Ø1.5–50.8mm) held in stock in G10 and G25. G3/G5 precision grade: 2–4 week lead time. Non-standard: quote on request.

Aerospace and medical certifications?

Material cert with every shipment. XRF purity analysis, AS9100 traceability, and medical-grade documentation available for OEM qualification programs.

06 · Related

Explore further.

Product Category

Ceramic Balls

Si₃N₄ and ZrO₂ balls — full grade range overview and application comparison.

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Silicon nitride balls,G3 to G60.