Electric Insulating Tapered Roller Bearings

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Insulated bearings are a general term for bearings that can prevent the passage of electric current and have insulating properties.

One of the main features of insulating bearings is that there is a 50-200μm thick ceramic coating on the surface, which is responsible for electrical insulation and can resist electrical sparks generated at a voltage of 1000V. Thicker coatings can resist high-voltage discharges above 1000V.

The Importance of Electrical Insulation in Bearings

Bearings play an important role in motors and other rotating equipment. The importance of electrical insulation of bearings is mainly reflected in the prevention of galvanic corrosion of the current on the bearings, to protect the grease and rolling elements and raceways from damage, and to achieve the role of improving the service life of bearings.

Common Applications of Insulated Bearings

Insulated bearings have a very wide range of applications. The continuous development of various industries, including the power industry, railroad facilities, machinery and metallurgical industry, mining and petrochemical industry, etc., all reflect the importance of insulated bearings.

Types of Insulated Bearings

Insulated bearings can be classified into various types according to the type, such as ceramic insulated bearings, hybrid bearings with silicon nitride balls, coated insulated bearings, oil-lubricated insulated bearings, insulated roller bearings, frequency converter grade insulated bearings and so on. Different types of insulated bearings have different characteristics and application scenarios.

Inquiry	Part Number								Principal dimensions（mm）			Basic load ratings（KN）		Pu	Speed ratings（rpm）		Weight(Kg)	ISO335	Dimensions （mm）							Abutment and fillet dimensions （mm）									Value
Inquiry	NO.	SKF	SKF	SKF	FAG	FAG	FAG	FAG	d1	D	B	dyc(Cr)	stc(Cor)	Pu	Speed Ratings	Limiting Speed	Weight(Kg)	Dimensions (ABMA)	d	d1～	B	C	r1,2(min)	r3,4(min)	a	da(max)	db(min)	Da(min)	Da(max)	Db(min)	Ca(min)	Cb(min)	ra(max)	rb(max)	e	Y	Yo
	30203J2	30203J2VL0241	30203J2VL2071	30203J2VA3091	30203J2J20A	30203J2J20AA	30203J2J20B	30203J2J20C	17	40	13,25	19	18,6	1,83	13000	18000	0,075	2DB	17	28	12	11	1	1	10	23	23	34	34	37	2	2	1
	30204J2/Q	30204J2/QVL0241	30204J2/QVL2071	30204J2/QVA3091	30204J2/QJ20A	30204J2/QJ20AA	30204J2/QJ20B	30204J2/QJ20C	20	47	15,25	32	28	3	12000	15000	0,12	2DB	20	33,2	14	12	1	1	11	27	26	40	41	43	2	3	1
	30205J2/Q	30205J2/QVL0241	30205J2/QVL2071	30205J2/QVA3091	30205J2/QJ20A	30205J2/QJ20AA	30205J2/QJ20B	30205J2/QJ20C	25	52	16,25	35,5	33,5	3,45	11000	13000	0,15	3CC	25	37,4	15	13	1	1	12	31	31	44	46	48	2	3	1
	302/28J2	302/28J2VL0241	302/28J2VL2071	302/28J2VA3091	302/28J2J20A	302/28J2J20AA	302/28J2J20B	302/28J2J20C	28	58	17,25	38	41,5	4,4	9000	12000	0,25	-	28	41,8	16	14	1	1	13	35	34	50	52	54	2	3	1
	30206J2/Q	30206J2/QVL0241	30206J2/QVL2071	30206J2/QVA3091	30206J2/QJ20A	30206J2/QJ20AA	30206J2/QJ20B	30206J2/QJ20C	30	62	17,25	46,5	44	4,8	9000	11000	0,23	3DB	30	44,6	16	14	1	1	14	38	36	53	56	57	2	3	1
	30207J2/Q	30207J2/QVL0241	30207J2/QVL2071	30207J2/QVA3091	30207J2/QJ20A	30207J2/QJ20AA	30207J2/QJ20B	30207J2/QJ20C	35	72	18,25	58,5	56	6,1	8000	9500	0,32	3DB	35	51,8	17	15	1,5	1,5	15	44	42	62	65	67	3	3	1,5
	30208J2/Q	30208J2/QVL0241	30208J2/QVL2071	30208J2/QVA3091	30208J2/QJ20A	30208J2/QJ20AA	30208J2/QJ20B	30208J2/QJ20C	40	80	19,75	71	68	7,65	7000	8500	0,42	3DB	40	57,5	18	16	1,5	1,5	16	49	47	69	73	74	3	3,5	1,5
	30209J2/Q	30209J2/QVL0241	30209J2/QVL2071	30209J2/QVA3091	30209J2/QJ20A	30209J2/QJ20AA	30209J2/QJ20B	30209J2/QJ20C	45	85	20,75	76,5	76,5	8,65	6300	8000	0,48	3DB	45	63	19	16	1,5	1,5	18	54	52	74	78	80	3	4,5	1,5
	30210J2/Q	30210J2/QVL0241	30210J2/QVL2071	30210J2/QVA3091	30210J2/QJ20A	30210J2/QJ20AA	30210J2/QJ20B	30210J2/QJ20C	50	90	21,75	86,5	91,5	10,4	6000	7500	0,54	3DB	50	67,9	20	17	1,5	1,5	19	58	57	79	83	85	3	4,5	1,5
	30211J2/Q	30211J2/QVL0241	30211J2/QVL2071	30211J2/QVA3091	30211J2/QJ20A	30211J2/QJ20AA	30211J2/QJ20B	30211J2/QJ20C	55	100	22,75	104	106	12	5300	6700	0,70	3DB	55	74,6	21	18	2	1,5	20	64	64	88	93	94	4	4,5	2
	30212J2/Q	30212J2/QVL0241	30212J2/QVL2071	30212J2/QVA3091	30212J2/QJ20A	30212J2/QJ20AA	30212J2/QJ20B	30212J2/QJ20C	60	110	23,75	112	114	13,2	5000	6000	0,88	3EB	60	81,5	22	19	2	1,5	22	70	68	96	103	103	4	4,5	2
	30213J2/Q	30213J2/QVL0241	30213J2/QVL2071	30213J2/QVA3091	30213J2/QJ20A	30213J2/QJ20AA	30213J2/QJ20B	30213J2/QJ20C	65	120	24,75	132	134	16,3	4500	5600	1,15	3EB	65	89	23	20	2	1,5	23	78	74	106	113	113	4	4,5	2
	30214J2/Q	30214J2/QVL0241	30214J2/QVL2071	30214J2/QVA3091	30214J2/QJ20A	30214J2/QJ20AA	30214J2/QJ20B	30214J2/QJ20C	70	125	26,25	125	156	18	4000	5300	1,25	3EB	70	93,9	24	21	2	1,5	25	82	78	110	115	118	4	5	2
	30215J2/Q	30215J2/QVL0241	30215J2/QVL2071	30215J2/QVA3091	30215J2/QJ20A	30215J2/QJ20AA	30215J2/QJ20B	30215J2/QJ20C	75	130	27,25	140	176	20,4	3800	5000	1,40	4DB	75	99,2	25	22	2	1,5	27	86	84	115	122	124	4	5	2
	30216J2/Q	30216J2/QVL0241	30216J2/QVL2071	30216J2/QVA3091	30216J2/QJ20A	30216J2/QJ20AA	30216J2/QJ20B	30216J2/QJ20C	80	140	28,25	151	183	21,2	3400	4800	1,60	3EB	80	105	26	22	2,5	2	28	92	90	124	130	132	4	6	2
	30217J2/Q	30217J2/QVL0241	30217J2/QVL2071	30217J2/QVA3091	30217J2/QJ20A	30217J2/QJ20AA	30217J2/QJ20B	30217J2/QJ20C	85	150	30,5	176	220	25,5	3200	4300	2,05	3EB	85	112	28	24	2,5	2	30	97	95	132	140	141	5	6,5	2
	30218J2	30218J2VL0241	30218J2VL2071	30218J2VA3091	30218J2J20A	30218J2J20AA	30218J2J20B	30218J2J20C	90	160	32,5	194	245	28,5	3000	4000	2,55	3FB	90	118	30	26	2,5	2	31	104	101	140	150	150	5	6,5	2
	30219J2	30219J2VL0241	30219J2VL2071	30219J2VA3091	30219J2J20A	30219J2J20AA	30219J2J20B	30219J2J20C	95	170	34,5	216	275	31,5	2800	3800	3,00	3FB	95	126	32	27	3	2,5	33	110	107	149	158	159	5	7,5	2,5
	33020/Q	33020/QVL0241	33020/QVL2071	33020/QVA3091	33020/QJ20A	33020/QJ20AA	33020/QJ20B	33020/QJ20C	100	150	39	224	390	41,5	3000	4000	2,40	2CE	100	122	39	32,5	2	1,5	29	109	108	135	142	143	7	6,5	2
	30220J2	30220J2VL0241	30220J2VL2071	30220J2VA3091	30220J2J20A	30220J2J20AA	30220J2J20B	30220J2J20C	100	180	37	246	320	36	2800	3600	3,65	3FB	100	133	34	29	3	2,5	35	116	112	157	168	168	5	8	2,5
	33021/Q	33021/QVL0241	33021/QVL2071	33021/QVA3091	33021/QJ20A	33021/QJ20AA	33021/QJ20B	33021/QJ20C	105	160	43	246	430	45,5	2800	3800	3,05	2DE	105	131	43	34	2,5	2	31	117	116	145	150	153	7	9	2
	30221J2	30221J2VL0241	30221J2VL2071	30221J2VA3091	30221J2J20A	30221J2J20AA	30221J2J20B	30221J2J20C	105	190	39	270	355	40	2600	3400	4,25	3FB	105	141	36	30	3	2,5	37	123	117	165	178	177	6	9	2,5
	33022	33022VL0241	33022VL2071	33022VA3091	33022J20A	33022J20AA	33022J20B	33022J20C	110	170	47	281	500	53	2600	3600	3,85	2DE	110	139	47	37	2,5	2	34	123	121	152	160	161	7	10	2
	30222J2	30222J2VL0241	30222J2VL2071	30222J2VA3091	30222J2J20A	30222J2J20AA	30222J2J20B	30222J2J20C	110	200	41	308	405	45	2400	3200	5,10	3FB	110	148	38	32	3	2,5	39	129	122	174	188	187	6	9	2,5
	33024	33024VL0241	33024VL2071	33024VA3091	33024J20A	33024J20AA	33024J20B	33024J20C	120	180	48	292	540	56	2600	3400	4,20	2DE	120	149	48	38	2,5	2	36	132	131	160	170	171	6	10	2
	30224J2	30224J2VL0241	30224J2VL2071	30224J2VA3091	30224J2J20A	30224J2J20AA	30224J2J20B	30224J2J20C	120	215	43,5	341	465	49	2200	3000	6,15	4FB	120	161	40	34	3	2,5	43	141	132	187	203	201	6	9,5	2,5
	30226J2	30226J2VL0241	30226J2VL2071	30226J2VA3091	30226J2J20A	30226J2J20AA	30226J2J20B	30226J2J20C	130	230	43,75	369	490	53	2000	2800	7,60	4FB	130	173	40	34	4	3	45	152	146	203	216	217	7	9,5	3
	30228J2	30228J2VL0241	30228J2VL2071	30228J2VA3091	30228J2J20A	30228J2J20AA	30228J2J20B	30228J2J20C	140	250	45,75	418	570	58,5	1900	2600	8,65	4FB	140	186	42	36	4	3	47	164	156	219	236	234	7	9,5	3
	30230	30230VL0241	30230VL2071	30230VA3091	30230J20A	30230J20AA	30230J20B	30230J20C	150	270	49	429	560	57	1800	2400	11,0	4GB	150	200	45	38	4	3	50	175	166	234	256	250	9	11	3
	30232J2	30232J2VL0241	30232J2VL2071	30232J2VA3091	30232J2J20A	30232J2J20AA	30232J2J20B	30232J2J20C	160	290	52	528	735	72	1600	2200	13,0	4GB	160	214	48	40	4	3	54	189	176	252	275	269	8	12	3
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