Ceramic Bearings

Our Ceramic Bearings are high-performance rolling bearings whose rolling elements and rings are partially or entirely made of ceramic materials — primarily silicon nitride (Si₃N₄), zirconium oxide (ZrO₂), or aluminum oxide (Al₂O₃). These advanced materials provide exceptional durability, thermal stability, and corrosion resistance, enabling reliable operation even in the most demanding environments.

Why Ceramic Bearings?

✓ 60% lighter than steel → higher speeds

✓ 2x harder than steel → longer lifespan

✓ Electrically insulating → prevents current damage

✓ Operates without lubrication → clean applications

🎥 Ceramic bearing advantages — speed comparison & application demo

⚙️ Ceramic Material Options

Silicon Nitride (Si₃N₄)

The most popular choice for hybrid bearings. Excellent fracture toughness, low density (3.2 g/cm³), and maintains strength up to 800°C. Ideal for high-speed spindles, electric motors, and aerospace applications.

⚡ High speed 🔥 Up to 800°C

Zirconia (ZrO₂)

Highest fracture toughness among ceramics, excellent wear resistance, and superior corrosion resistance against acids and alkalis. Perfect for chemical pumps and food processing.

Chemical resistant 💪 High toughness

Alumina (Al₂O₃)

Cost-effective ceramic option with excellent hardness, electrical insulation, and chemical stability. Suitable for general industrial applications requiring insulation or corrosion protection.

💰 Cost-effective ⚡ Electrical insulation

Hybrid vs. Full Ceramic Bearings

Hybrid Ceramic

Steel rings + ceramic balls
Best cost-performance ratio
Higher speed than all-steel
Extended grease life
Best for: Electric motors, machine tools, high-speed spindles

Full Ceramic

100% ceramic rings + balls
Non-magnetic & fully corrosion-proof
Operates without lubrication
Maximum temperature resistance
Best for: Vacuum, chemical, medical, extreme temperature

🏭 Critical Applications

Electric Motors

Prevents current damage

Aerospace

Lightweight & high speed

Medical Devices

MRI-compatible, non-magnetic

Chemical Processing

Corrosive environments

High-Temperature Ovens

Up to 800°C continuous

Vacuum Equipment

No outgassing, runs dry

⭐ What Our Customers Say

★★★★★

"Switched to BMT hybrid ceramic bearings for our high-speed spindles. Speed increased by 25% and operating temperature dropped by 15°C. Excellent product."

— Machine Tool Manufacturer, Germany

★★★★★

"Full ceramic bearings from BMT solved our corrosion problem in chemical pumps. Running 24/7 for 14 months with zero maintenance. Highly recommended."

— Chemical Plant Engineer, USA

★★★★★

"Using BMT hybrid bearings in our EV motor prototypes. The electrical insulation performance is outstanding. Great technical support team."

— EV Motor R&D, China

❓ Frequently Asked Questions

What is the difference between hybrid and full ceramic bearings?

Hybrid bearings have steel rings with ceramic balls, offering the best balance of performance and cost. Full ceramic bearings have both rings and balls made of ceramic, providing complete corrosion resistance, non-magnetic properties, and the ability to run without lubrication.

Can ceramic bearings run without grease?

Yes, full ceramic bearings can operate dry (no lubrication) in clean environments. Hybrid bearings still require lubrication for the steel rings, but ceramic balls reduce friction and extend grease life by 2-3x compared to all-steel bearings.

What is the maximum temperature for ceramic bearings?

Silicon nitride bearings can operate up to 800°C in air. Zirconia bearings are suitable up to 400°C. For high-temperature applications, we recommend full ceramic bearings with specialized retainers.

Are ceramic bearings worth the cost?

For high-speed, high-temperature, corrosive, or electrically sensitive applications — yes. The longer lifespan, reduced maintenance, and improved efficiency typically provide ROI within 6-12 months.

Need Ceramic Bearings for Extreme Conditions?

Tell us your application — speed, temperature, load, environment

Request Engineering Support → Download Ceramic Catalog PDF

📧 info@demy-bearing.com | 📞 +86-15990260649 | 💬 24h technical consultation

Parameter

Designation	Overall Dimension			Mounting Dimension (mm)
	（mm)			r	da	da	Da	ra
	d	D	B	min	min	max	max	max
684CE	4	9	2.5	0.1	4.8	/	8.2	0.1
694CE	4	11	4	0.15	5.2	/	9.8	0.15
604CE	4	12	4	0.2	5.6	/	10.4	0.2
624CE	4	13	5	0.2	5.6	/	11.4	0.2
634CE	4	16	5	0.3	6	/	14	0.3
685CE	5	11	3	0.15	6.2	/	9.8	0.15
695CE	5	13	4	0.2	6.6	/	11.4	0.2
605CE	5	14	5	0.2	6.6	/	12.4	0.2
625CE	5	16	5	0.3	7	/	14	0.3
635CE	5	19	6	0.3	7	/	17	0.3
686CE	6	13	3.5	0.15	7.2	/	11.8	0.15
696CE	6	15	5	0.2	7.6	/	13.4	0.2
606CE	6	17	6	0.3	8	/	15	0.3
626CE	6	19	6	0.3	8	/	17	0.3
636CE	6	22	7	0.3	8	/	20	0.3
687CE	7	14	3.5	0.15	8.2	/	12.8	0.15
697CE	7	17	5	0.3	9	/	15	0.3
607CE	7	19	6	0.3	9	/	17	0.3
627CE	7	22	7	0.3	9	/	20	0.3
637CE	7	26	9	0.3	9	/	24	0.3
688CE	8	16	4	0.2	9.6	/	14.4	0.2
698CE	8	19	6	0.3	10	/	17	0.3
608CE	8	22	7	0.3	10	/	20	0.3
628CE	8	24	8	0.3	10	/	22	0.3
638CE	8	28	9	0.3	10	/	26	0.3
689CE	9	17	4	0.2	10.6	/	15.4	0.2
699CE	9	20	6	0.3	11	/	18	0.3
609CE	9	24	7	0.3	11	/	22	0.3
629CE	9	26	8	0.3	11	/	24	0.3
639CE	9	30	10	0.6	13	/	26	0.6
6800CE	10	19	5	0.3	12	12	17	0.3
6900CE	10	22	6	0.3	12	12.5	20	0.3
6000CE	10	26	8	0.3	12	13	24	0.3
6200CE	10	30	9	0.6	14	16	26	0.6
6300CE	10	35	11	0.6	14	16.5	31	0.6
6801CE	12	21	5	0.3	14	14	19	0.3
6901CE	12	24	6	0.3	14	14.5	22	0.3
16001CE	12	28	7	0.3	14	/	26	0.3
6001CE	12	28	8	0.3	14	15.5	26	0.3
6201CE	12	32	10	0.6	16	17	28	0.6
6301CE	12	37	12	1	17	18	32	1
6802CE	15	24	5	0.3	17	17	22	0.3
6902CE	15	28	7	0.3	17	17	26	0.3
16002CE	15	32	8	0.3	17	/	30	0.3
6002CE	15	32	9	0.3	17	19	30	0.3
6202CE	15	35	11	0.6	19	20.5	31	0.3
6302CE	15	42	13	1	20	22.5	37	1
6803CE	17	26	5	0.3	19	19	24	0.3
6903CE	17	30	7	0.3	19	19.5	28	0.3
16003CE	17	35	8	0.3	19	/	33	0.3
6003CE	17	35	10	0.3	19	21.5	33	0.3
6203CE	17	40	12	0.6	21	23.5	36	0.6
6303CE	17	47	14	1	22	25.5	42	1
6403CE	17	62	17	1.1	23.5	/	55.5	1
6804CE	20	32	7	0.3	22	22.5	30	0.3
6904CE	20	37	9	0.3	22	24	35	0.3
16004CE	20	42	8	0.3	22	/	40	0.3
6004CE	20	42	12	0.6	24	25.5	38	0.6
6204CE	20	47	14	1	25	26.5	42	1
6304CE	20	52	15	1.1	26.5	28	45.5	1
6404CE	20	72	19	1.1	26.5	/	65.5	1
6805CE	25	37	7	0.3	27	27	35	0.3
6905CE	25	42	9	0.3	27	28.5	40	0.3
16005CE	25	47	8	0.3	27	/	45	0.3
6005CE	25	47	12	0.6	29	30	43	0.6
6205CE	25	52	15	1	30	32	47	1
6305CE	25	62	17	1.1	31.5	36	55.5	1
6405CE	25	80	21	1.5	33	/	72	1.5
6806CE	30	42	7	0.3	32	32	50	1
6906CE	30	47	9	0.3	32	34	57	1
16006CE	30	55	9	0.3	32	42.5	65.5	1
6006CE	30	55	13	1	35	36.5	53	1
6206CE	30	62	16	1	35	38.5	60	1
6306CE	30	72	19	1.1	36.5	42.5	68.5	1
6406CE	30	90	23	1.5	54	/	82	2
6807CE	35	47	7	0.3	37	37	45	0.3
6907CE	35	55	10	0.6	39	39	51	0.6
16007CE	35	62	9	0.3	37	/	60	0.3
6007CE	35	62	14	1	40	41.5	57	1
6207CE	35	72	17	1.1	41.5	44.5	65.5	1
6307CE	35	80	21	1.5	43	47	72	1.5
6407CE	35	100	25	1.5	43	/	92	1.5
6808CE	40	52	7	0.3	42	42	50	0.3
6908CE	40	62	12	0.6	44	46	58	0.6
16008CE	40	68	9	0.3	42	/	66	0.3
6008CE	40	68	15	1	45	47.5	63	1
6208CE	40	80	18	1.1	46.5	50.5	73.5	1
6308CE	40	90	23	1.5	48	53	80	1.5
6408CE	40	110	27	2	49	/	101	2
6809CE	45	58	7	0.3	47	47.5	56	0.3
6909CE	45	68	12	0.6	49	50	64	0.6
16009CE	45	75	10	0.6	49	/	71	0.6
6009CE	45	75	16	1	50	53.5	70	1
6209CE	45	85	19	1.1	51.5	55.5	78.5	1
6309CE	45	100	25	1.5	53	61.5	92	1.5
6409CE	45	120	29	2	54	/	111	2
6810CE	50	65	7	0.3	52	52.5	63	0.3
6910CE	50	72	12	0.6	54	55	68	0.6
16010CE	50	80	10	0.6	54	/	76	0.6
6010CE	50	80	16	1	55	58.5	75	1
6210CE	50	90	20	1.1	56.5	60	83.2	1
6310CE	50	110	27	2	59	68	101	2
6410CE	50	130	31	2.1	61	/	119	2
6811CE	55	72	9	0.3	57	59	70	0.3
6911CE	55	80	13	1	60	61.5	75	1
16011CE	55	90	11	0.6	59	/	86	0.6
6011CE	55	90	18	1.1	61.5	64	83.5	1
6211CE	55	100	21	1.5	63	66.5	92	1.5
6311CE	55	120	29	2	64	72.5	111	2
6411CE	55	140	33	2.1	66	/	129	2
6812CE	60	78	10	0.3	62	64	76	0.3
6912CE	60	85	13	1	65	66	80	1
16012CE	60	95	11	0.6	64	/	91	0.6
6012CE	60	95	18	1.1	66.5	69	88.5	1
6212CE	60	110	22	1.5	68	74.5	102	1.5
6312CE	60	130	31	2.1	71	79	119	2
6412CE	60	150	35	2.1	71		139	2
6813CE	65	85	10	0.6	69	69	81	0.6
6913CE	65	90	13	1	70	71.5	85	1
16013CE	65	100	11	0.6	69	/	96	0.6
6013CE	65	100	18	1.1	71.5	73	93.5	1
6213CE	65	120	23	1.5	73	80	112	1.5
6313CE	65	140	33	2.1	76	85.5	129	2
6814CE	70	90	10	0.6	74	74.5	86	0.6
6914CE	70	100	16	1	75	77.5	95	1
16014CE	70	110	13	0.6	74	/	106	0.6
6014CE	70	110	20	1.1	76.5	80.5	103.5	1
6214CE	70	125	24	1.5	78	84	117	1.5
6314CE	70	150	35	2.1	81	92	139	2
6815CE	75	95	10	0.6	79	79.5	91	0.6
6915CE	75	105	16	1	80	82	100	1
16015CE	75	115	13	0.6	79	/	111	0.6
6015CE	75	115	20	1.1	81.5	85.5	108.5	1
6215CE	75	130	25	1.5	83	90	122	1.5
6816CE	80	100	10	0.6	84	84.5	96	0.6
6916CE	80	110	16	1	85	87.5	105	1
16016CE	80	125	14	0.6	84	/	121	0.6
6016CE	80	125	22	1.1	86.5	91	118.5	1
6216CE	80	140	26	2	89	95.5	131	2
6817CE	85	110	13	1	90	90.5	105	1
6917CE	85	120	18	1.1	91.5	94.5	113.5	1
16017CE	85	130	14	0.6	89	/	126	0.6
6017CE	85	130	22	1.1	91.5	96	123.5	1
6217CE	85	150	28	2	94	102	141	2
6818CE	90	115	13	1	95	95.5	110	1
6918CE	90	125	18	1.1	96.5	98.5	118.5	1
16018CE	90	140	16	1	95	/	135	1
6018CE	90	140	24	1.5	98	103	132	1.5
6819CE	95	120	13	1	100	102	115	1
6919CE	95	130	18	1.1	101.5	104	123.5	1
16019CE	95	145	16	1	100	/	140	1
6019CE	95	145	24	1.5	103	109	137	1.5
6820CE	100	125	13	1	105	106	120	1
6920CE	100	140	20	1.1	106.5	111	133.5	1
16020CE	100	150	16	1	105	/	145	1
6020CE	100	150	24	1.5	108	113	142	1.5
6821CE	105	130	13	1	110	111	125	1
6921CE	105	145	20	1.1	111.5	116	138.5	1
6822CE	110	140	16	1	115	117	135	1
6922CE	110	150	20	1.1	116.5	121	143.5	1
6824CE	120	150	16	1	125	127	145	1

Designation	Overall Dimension			Mounting Dimension (mm)
	（mm)			r	r1	da	Da	ra
	d	D	B	min	min	min	max	max
7900CE	10	22	6	0.3	0.15	12.5	19.5	0.3
7000CE	10	26	8	0.3	0.15	12.5	23.5	0.3
7200CE	10	30	9	0.6	0.3	15	25	0.6
7300CE	10	35	11	0.6	0.3	15	30	0.6
7901CE	12	24	6	0.3	0.15	14.5	21.5	0.3
7001CE	12	28	8	0.3	0.15	14.5	25.5	0.3
7201CE	12	32	10	0.6	0.3	17	27	0.6
7301CE	12	37	12	1	0.6	18	31	1
7902CE	15	28	7	0.3	0.15	17.5	25.5	0.3
7002CE	15	32	9	0.3	0.15	17.5	29.5	0.3
7202CE	15	35	11	0.6	0.3	20	30	0.3
7302CE	15	42	13	1	0.6	21	36	1
7903CE	17	30	7	0.3	0.15	19.5	27.5	0.3
7003CE	17	35	10	0.3	0.15	19.5	32.5	0.3
7203CE	17	40	12	0.6	0.3	22	35	0.6
7303CE	17	47	14	1	0.6	23	41	1
7904CE	20	37	9	0.3	0.15	22.5	34.5	0.3
7004CE	20	42	12	0.6	0.3	25	37	0.6
7204CE	20	47	14	1	0.6	26	41	1
7304CE	20	52	15	1.1	0.6	27	45	1
7905CE	25	42	9	0.3	0.15	27.5	39.5	0.3
7005CE	25	47	12	0.6	0.3	30	42	0.6
7205CE	25	52	15	1	0.6	31	46	1
7305CE	25	62	17	1.1	0.6	32	55	1
7906CE	30	47	9	0.3	0.15	32.5	44.5	1
7006CE	30	55	13	1	0.6	36	49	1
7206CE	30	62	16	1	0.6	36	56	1
7306CE	30	72	19	1.1	0.6	37	65	1
7907CE	35	55	10	0.6	0.3	40	50	0.6
7007CE	35	62	14	1	0.6	41	56	1
7207CE	35	72	17	1.1	0.6	42	65	1
7307CE	35	80	21	1.5	1	44	71	1.5
7908CE	40	62	12	0.6	0.3	45	57	0.6
7008CE	40	68	15	1	0.6	46	62	1
7208CE	40	80	18	1.1	0.6	47	73	1
7308CE	40	90	23	1.5	1	49	81	1.5
7909CE	45	68	12	0.6	0.3	50	63	0.6
7009CE	45	75	16	1	0.6	51	69	1
7209CE	45	85	19	1.1	0.6	52	78	1
7309CE	45	100	25	1.5	1	54	91	1.5
7910CE	50	72	12	0.6	0.3	55	67	0.6
7010CE	50	80	16	1	0.6	56	74	1
7210CE	50	90	20	1.1	0.6	57	83	1
7310CE	50	110	27	2	1	60	100	2
7911CE	55	80	13	1	0.6	61	74	1
7011CE	55	90	18	1.1	0.6	62	83	1
7211CE	55	100	21	1.5	1	64	91	1.5
7311CE	55	120	29	2	1	65	110	2
7912CE	60	85	13	1	0.6	66	79	1
7012CE	60	95	18	1.1	0.6	67	88	1
7212CE	60	110	22	1.5	1	69	101	1.5
7312CE	60	130	31	2.1	1.1	72	118	2
7913CE	65	90	13	1	0.6	71	84	1
7013CE	65	100	18	1.1	0.6	72	93	1
7213CE	65	120	23	1.5	1	74	111	1.5
7313CE	65	140	33	2.1	1.1	77	128	2
7914CE	70	100	16	1	0.6	76	94	1
7014CE	70	110	20	1.1	0.6	77	103	1
7214CE	70	125	24	1.5	1	79	116	1.5
7314CE	70	150	35	2.1	1.1	82	138	2
7915CE	75	105	16	1	0.6	81	99	1
7015CE	75	115	20	1.1	0.6	82	108	1
7215CE	75	130	25	1.5	1	84	121	1.5
7916CE	80	110	16	1	0.6	86	104	1
7016CE	80	125	22	1.1	0.6	87	118	1
7216CE	80	140	26	2	1	90	130	2
7017CE	85	130	22	1.1	0.6	92	123	1
7217CE	85	150	28	2	1	95	140	2
7918CE	90	125	18	1.1	0.6	97	118	1
7018CE	90	140	24	1.5	1	99	131	1.5
7919CE	95	130	18	1.1	0.6	102	123	1
7019CE	95	145	24	1.5	1	104	136	1.5
7920CE	100	140	20	1.1	0.6	107	133	1
7020CE	100	150	24	1.5	1	109	141	1.5
7921CE	105	145	20	1.1	0.6	112	138	1
7922CE	110	150	20	1.1	0.6	117	143	1

Designation	Mounting Dimension (mm)								Weight
	Mounting Dimension (mm)								（kg)
	d	D	B	S	C	r/min	G	ds	ZrO2	Si3N4
UC201CE	12	47	31	12.7	17	0.6	4.5	M6 x 1	0.16	0.09
UC202CE	15	47	31	12.7	17	0.6	4.5	M6 x 1	0.15	0.08
UC203CE	17	47	31	12.7	17	0.6	4.5	M6 x 1	0.14	0.07
UC204CE	20	47	31	12.7	17	1	4.5	M6 x 1	0.12	0.07
UC205CE	25	52	34.1	14.3	17V	1	5	M6 x 1	0.17	0.09
UC206CE	30	62	38.1	15.9	19	1	5	M6 x 1	0.27	0.14
UC207CE	35	72	42.9	17.5	20	1.1	6	M8 x 1	0.4	0.21
UC208CE	40	80	49.2	19	21	1.1	8	M8 x 1	0.54	0.29
UC209CE	45	85	49.2	19	22	1.1	8	M8 x 1	0.57	0.3
UC210CE	50	90	51.6	19	24	1.1	9	M10 x 1	0.64	0.34
UC211CE	55	100	55.6	22.2	25	1.5	9	M10 x 1	0.89	0.48
UC212CE	60	110	65.1	25.4	27	1.5	10	M10 x 1	1.2	0.64
UC213CE	65	120	65.1	25.4	27	1.5	10	M10 x 1	1.51	0.8
UC214CE	70	125	74.6	30.2	29	1.5	12	M12 x 1.25	1.68	0.89
UC215CE	75	130	77.8	33.3	30	1.5	12	M12 x 1.25	1.86	0.99
UC216CE	80	140	82.6	33.3	33	2	14	M12 x 1.25	2.17	1.16
UC217CE	85	150	85.7	34.1	36	2	14	M12 x 1.25	2.62	1.39
UC218CE	90	160	96	39.7	37	2	14	M12 x 1.25	3.31	1.76
UC220CE	100	180	108	42	41	2	14	M12 x 1.25	3.46	1.85

As a reliable manufacturer and supplier of Bearings in China, we have our own factory. If you are looking to purchase high-quality Bearings. please contact us.

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