What is the minimum order quantity (MOQ)?

Stock models can be supplied in small quantities, and non-standard bearings can be custom-made even in small batches. Send us the model number or drawing and we will confirm the MOQ with your quotation.

Can you supply bearings under our own brand?

Yes. NKEN offers full OEM service: your brand laser-marked on the bearing rings, custom colour boxes and labels, so the goods arrive ready for your shelf.

Do you provide free samples?

Yes, free samples are available for most catalogue models so you can test quality and fit before placing a bulk order.

What information do you need to quote?

The bearing model number (or the brand cross-reference number you currently buy), quantity, delivery destination, and any special requirements such as clearance, seals or branding. A drawing is enough for non-standard parts.

Which countries do you export to?

NKEN bearings are exported to more than 73 countries, with sea and air shipping options and export packing as standard.

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Full ceramic ZrO2 white ball bearing, corrosion-free and electrically insulating, for high-speed and harsh-environment use

Ceramic & Hybrid Ceramic Bearings — ZrO2, Si3N4, up to P4

NKEN supplies full ceramic bearings in zirconia (ZrO2) and silicon nitride (Si3N4), and hybrid ceramic bearings with Si3N4 balls in steel rings, in precision grades up to P4. Ceramic rolling elements are lighter, harder and electrically insulating, so these bearings run faster, cooler and longer in spindles, medical equipment, semiconductor machinery, pumps and high-speed motors — and they resist water, chemicals and corrosion where steel bearings fail.

The Shandong factory has produced ceramic bearings since the group's 2007 joint investment, alongside its cylindrical and spherical roller lines. Standard deep groove sizes follow the 62/63 dimension series in the table below; angular contact and special sizes are made to order, including small quantities.

Full ceramic: ZrO2 or Si3N4 rings and balls; hybrid: Si3N4 balls with steel rings
Precision up to P4 for spindle and instrument applications
Non-magnetic, electrically insulating, corrosion-resistant — runs in water and chemicals
Higher speed capability and lower friction than all-steel bearings
Made-to-order sizes and small batches welcome

Materials	ZrO2, Si3N4 full ceramic · Si3N4 balls + GCr15/stainless rings (hybrid)
Precision	P0 standard; P5, P4 on request
Temperature	Full ceramic suitable for high-temperature, lubricant-free running (grade-dependent)
Cages	PTFE, PEEK or ceramic, per application
Applications	Spindles, medical, semiconductor, food machinery, high-speed motors

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Ceramic & Hybrid Ceramic Bearings — models, dimensions & cross-reference

Model	Bore d (mm)	OD D (mm)	Width B (mm)	Versions available
6202	15	35	11	Full ZrO2 · Full Si3N4 · Hybrid
6204	20	47	14	Full ZrO2 · Full Si3N4 · Hybrid
6205	25	52	15	Full ZrO2 · Full Si3N4 · Hybrid
6206	30	62	16	Full ZrO2 · Full Si3N4 · Hybrid
6207	35	72	17	Full ZrO2 · Full Si3N4 · Hybrid
6208	40	80	18	Full ZrO2 · Full Si3N4 · Hybrid
6306	30	72	19	Full ZrO2 · Hybrid
6308	40	90	23	Full ZrO2 · Hybrid

Dimensions follow the standard 62/63 series, so ceramic and hybrid bearings interchange directly with the steel bearing of the same number. Full range, including miniature and angular contact ceramic bearings, confirmed per inquiry.

Applications

Electric Motors & VFD Machine Tools & Spindles

Ceramic & Hybrid Ceramic Bearings — questions buyers ask

ZrO2 or Si3N4 — which ceramic should I choose?

Si3N4 is harder, lighter and rated for higher speeds and temperatures; ZrO2 is the economical choice for corrosion resistance and insulation at moderate speeds. Tell us the application and we recommend the grade.

Can a hybrid ceramic bearing replace my steel 6205?

Yes — hybrid 6205 keeps the standard 25 × 52 × 15 mm dimensions, with Si3N4 balls for higher speed and longer grease life. Send quantity and precision grade for a quote.

Do you make ceramic bearings to P4 precision?

Yes, precision up to P4 is available on spindle and instrument sizes. State the grade and any runout requirement with your inquiry.

Get a quote for Ceramic & Hybrid Ceramic Bearings

Tell us the model and quantity — we reply with price, stock status and delivery time. Free samples available for most models. Prefer to talk? WhatsApp James Ke at +86 188 9536 7568 (24/7 support).