Sealed Bearing

01

2RS: rubber contact seals

Suited to dust and water. The seal lip touches the inner ring, which adds friction and lowers the speed limit.

02

ZZ: metal shields

Non-contact steel shields. Lower friction and higher speed than 2RS, but less protection against water and fine dust.

03

Grease life

Sealed bearings cannot normally be relubricated. In warm or fast positions the grease life can end service before fatigue does.

Size table

Sealed bearing sizes with 2RS seals

Every deep groove ball bearing size that ENRO lists with a 2RS version. The versions column on each model page shows whether ZZ is also listed.

Bore d (mm) Outside D (mm) Width B (mm) Tolerance ± (mm)

Series

24 of 175 models shown

Click a model to open its full specification page.

Model	Series	d mm	D mm	B mm	r min mm	Cr kN	C0r kN	Grease rpm	Weight kg	Quote
6700	6700	10	15	4	0.1	1.01	0.555	36,000	0.002	Quote
6800	6800	10	19	5	0.3	1.65	0.89	30,000	0.005	Quote
6900	6900	10	22	6	0.3	2.43	1.22	29,000	0.009	Quote
6000	6000	10	26	8	0.3	4.10	1.88	28,000	0.018	Quote
6200	6200	10	30	9	0.6	4.59	2.39	24,000	0.032	Quote
6300	6300	10	35	11	0.6	7.38	3.36	22,000	0.052	Quote
6701	6700	12	18	4	0.2	1.07	0.655	32,000	0.003	Quote
6801	6800	12	21	5	0.3	1.73	1.00	28,000	0.006	Quote
6901	6900	12	24	6	0.3	2.60	1.40	26,000	0.010	Quote
16001	16000	12	28	7	0.3	4.59	2.29	25,000	0.019	Quote
6001	6000	12	28	8	0.3	4.59	2.29	25,000	0.022	Quote
6201	6200	12	32	10	0.6	5.49	2.75	21,000	0.037	Quote
6301	6300	12	37	12	1	8.73	4.03	19,000	0.060	Quote
6702	6700	15	21	4	0.2	1.15	0.79	29,000	0.0035	Quote
6802	6800	15	24	5	0.3	1.87	1.21	25,000	0.007	Quote
6902	6900	15	28	7	0.3	3.69	1.98	23,000	0.015	Quote
16002	16000	15	32	8	0.3	5.04	2.73	21,000	0.027	Quote
6002	6000	15	32	9	0.3	5.04	2.73	21,000	0.031	Quote
6202	6200	15	35	11	0.6	6.98	3.60	18,000	0.045	Quote
6302	6300	15	42	13	1	10.26	5.23	16,000	0.083	Quote
6703	6700	17	23	4	0.2	1.20	0.865	26,000	0.004	Quote
6803	6800	17	26	5	0.3	2.53	1.65	23,000	0.007	Quote
6903	6900	17	30	7	0.3	4.46	2.48	21,000	0.017	Quote
16003	16000	17	35	8	0.3	6.12	3.22	19,000	0.033	Quote
6003	6000	17	35	10	0.3	6.12	3.22	19,000	0.041	Quote
6203	6200	17	40	12	0.6	8.64	4.60	17,000	0.067	Quote
6303	6300	17	47	14	1	12.15	6.29	15,000	0.113	Quote
6403	6400	17	62	17	1.1	22.70	10.80	14,000	0.270	Quote
6704	6700	20	27	4	0.2	1.79	1.32	23,000	0.005	Quote
6804	6800	20	32	7	0.3	3.60	2.37	20,000	0.017	Quote
6904	6900	20	37	9	0.3	5.76	3.55	18,000	0.037	Quote
16004	16000	20	42	8	0.3	7.11	4.32	17,000	0.048	Quote
6004	6000	20	42	12	0.6	8.46	4.85	17,000	0.068	Quote
6204	6200	20	47	14	1	11.52	6.65	15,000	0.107	Quote
6304	6300	20	52	15	1.1	14.31	7.58	13,000	0.145	Quote
60/22	6000	22	44	12	0.6	8.46	4.85	16,000	0.074	Quote
62/22	6200	22	50	14	1	11.61	5.84	13,000	0.119	Quote
63/22	6300	22	56	16	1.1	16.56	8.88	12,000	0.179	Quote
6705	6700	25	32	4	0.2	1.93	1.55	19,000	0.006	Quote
6805	6800	25	37	7	0.3	3.87	2.83	17,000	0.021	Quote
6905	6900	25	42	9	0.3	6.35	4.37	15,000	0.042	Quote
16005	16000	25	47	8	0.3	7.52	4.90	14,000	0.059	Quote
6005	6000	25	47	12	0.6	9.09	5.62	14,000	0.079	Quote
6205	6200	25	52	15	1	12.60	7.54	12,000	0.129	Quote
6305	6300	25	62	17	1.1	19.08	10.46	11,000	0.235	Quote
60/28	6000	28	52	12	0.6	11.25	7.10	13,000	0.096	Quote
62/28	6200	28	58	16	1	16.11	9.36	11,000	0.175	Quote
63/28	6300	28	68	18	1.1	24.03	13.44	10,000	0.287	Quote
6706	6700	30	37	4	0.2	2.05	1.78	17,000	0.008	Quote
6806	6800	30	42	7	0.3	4.23	3.50	14,000	0.024	Quote
6906	6900	30	47	9	0.3	6.53	4.80	13,000	0.052	Quote
16006	16000	30	55	9	0.3	10.08	7.06	12,000	0.087	Quote
6006	6000	30	55	13	1	11.88	7.97	12,000	0.116	Quote
6206	6200	30	62	16	1	17.55	10.85	10,000	0.199	Quote
6306	6300	30	72	19	1.1	24.03	14.40	9,500	0.345	Quote
60/32	6000	32	58	13	1	13.59	8.78	11,000	0.122	Quote
62/32	6200	32	65	17	1	18.63	11.14	10,000	0.225	Quote
63/32	6300	32	75	20	1.1	26.82	16.22	9,000	0.389	Quote
6807	6800	35	47	7	0.3	4.41	3.89	12,000	0.027	Quote
6907	6900	35	55	10	0.6	10.08	7.15	11,000	0.075	Quote
16007	16000	35	62	9	0.3	10.53	7.87	11,000	0.107	Quote
6007	6000	35	62	14	1	14.40	9.89	11,000	0.151	Quote
6207	6200	35	72	17	1.1	23.13	14.69	9,300	0.284	Quote
6307	6300	35	80	21	1.5	30.15	18.34	8,400	0.464	Quote
6407	6400	35	100	25	1.5	55.00	31.00	7,800	0.952	Quote
6908	6900	40	62	12	0.6	13.14	9.79	10,000	0.112	Quote
16008	16000	40	68	9	0.3	11.34	9.26	9,500	0.130	Quote
6008	6000	40	68	15	1	15.12	11.04	9,500	0.190	Quote
6208	6200	40	80	18	1.1	26.19	17.09	8,300	0.366	Quote
6308	6300	40	90	23	1.5	36.45	23.04	7,400	0.636	Quote
6408	6400	40	110	27	2	63.50	36.50	7,000	1.230	Quote
6909	6900	45	68	12	0.6	13.59	10.75	9,300	0.126	Quote
16009	16000	45	75	10	0.6	11.61	10.08	8,700	0.167	Quote
6009	6000	45	75	16	1	18.90	14.50	8,700	0.241	Quote
6209	6200	45	85	19	1.1	29.25	19.58	7,400	0.420	Quote
6309	6300	45	100	25	1.5	47.70	30.72	6,700	0.829	Quote
6810	6800	50	65	7	0.3	5.94	5.86	9,100	0.050	Quote
6910	6900	50	72	12	0.6	14.04	11.71	8,500	0.135	Quote
16010	16000	50	80	10	0.6	11.88	10.85	8,000	0.175	Quote
6010	6000	50	80	16	1	19.62	15.94	8,000	0.261	Quote
6210	6200	50	90	20	1.1	31.50	22.37	6,700	0.459	Quote
6310	6300	50	110	27	2	55.80	36.39	6,100	1.060	Quote
6811	6800	55	72	9	0.3	7.92	7.78	8,300	0.081	Quote
6911	6900	55	80	13	1	14.40	12.77	7,800	0.189	Quote
16011	16000	55	90	11	0.6	16.74	14.69	7,300	0.257	Quote
6011	6000	55	90	18	1.1	25.47	20.36	7,300	0.381	Quote
6211	6200	55	100	21	1.5	39.15	28.03	6,100	0.619	Quote
6311	6300	55	120	29	2	64.35	43.20	5,500	1.370	Quote
6812	6800	60	78	10	0.3	10.35	10.18	7,600	0.103	Quote
6912	6900	60	85	13	1	14.76	13.73	7,200	0.192	Quote
16012	16000	60	95	11	0.6	18.00	16.80	6,700	0.281	Quote
6012	6000	60	95	18	1.1	26.55	22.27	6,700	0.412	Quote
6212	6200	60	110	22	1.5	47.25	34.56	5,700	0.783	Quote
6312	6300	60	130	31	2.1	73.80	49.92	5,100	1.720	Quote
6813	6800	65	85	10	0.6	10.44	10.56	7,000	0.128	Quote
6913	6900	65	90	13	1	15.66	15.46	6,700	0.218	Quote
16013	16000	65	100	11	0.6	18.45	17.95	6,200	0.300	Quote
6013	6000	65	100	18	1.1	27.45	24.19	6,200	0.439	Quote
6213	6200	65	120	23	1.5	51.75	38.40	5,200	1.000	Quote
6313	6300	65	140	33	2.1	83.25	57.60	4,700	2.110	Quote
6814	6800	70	90	10	0.6	10.89	11.42	6,600	0.134	Quote
6914	6900	70	100	16	1	21.33	20.35	6,200	0.349	Quote
16014	16000	70	110	13	0.6	21.96	21.70	5,800	0.441	Quote
6014	6000	70	110	20	1.1	34.20	29.67	5,800	0.608	Quote
6214	6200	70	125	24	1.5	55.80	42.24	4,800	1.090	Quote
6314	6300	70	150	35	2.1	93.60	65.28	4,400	2.570	Quote
6815	6800	75	95	10	0.6	11.25	12.38	6,100	0.149	Quote
6915	6900	75	105	16	1	21.96	21.70	5,800	0.364	Quote
16015	16000	75	115	13	0.6	22.50	23.04	5,400	0.463	Quote
6015	6000	75	115	20	1.1	35.55	32.16	5,400	0.649	Quote
6215	6200	75	130	25	1.5	59.40	47.25	4,600	1.190	Quote
6315	6300	75	160	37	2.1	101.70	73.92	4,100	3.080	Quote
6816	6800	80	100	10	0.6	11.43	12.77	5,700	0.151	Quote
6916	6900	80	110	16	1	22.41	23.04	5,400	0.391	Quote
16016	16000	80	125	14	0.6	22.86	24.10	5,000	0.621	Quote
6016	6000	80	125	22	1.1	42.75	38.40	5,000	0.872	Quote
6216	6200	80	140	26	2	65.25	60.48	4,300	1.420	Quote
6316	6300	80	170	39	2.1	110.70	83.40	3,800	3.670	Quote
6817	6800	85	110	13	1	16.83	18.24	5,400	0.263	Quote
6917	6900	85	120	18	1.1	28.80	28.42	5,100	0.550	Quote
16017	16000	85	130	14	0.6	23.31	25.15	4,800	0.652	Quote
6017	6000	85	130	22	1.1	44.55	41.28	4,800	0.918	Quote
6217	6200	85	150	28	2	75.15	61.44	4,000	1.760	Quote
6317	6300	85	180	41	3	119.70	93.12	3,600	4.280	Quote
6818	6800	90	115	13	1	17.10	18.19	5,100	0.276	Quote
6918	6900	90	125	18	1.1	29.70	30.24	4,800	0.585	Quote
16018	16000	90	140	16	1	30.15	32.16	4,500	0.873	Quote
6018	6000	90	140	24	1.5	52.20	47.25	4,500	1.190	Quote
6218	6200	90	160	30	2	86.40	68.64	3,800	2.180	Quote
6318	6300	90	190	43	3	128.70	102.72	3,400	4.980	Quote
6819	6800	95	120	13	1	17.37	19.68	4,800	0.297	Quote
6919	6900	95	130	18	1.1	30.15	32.16	4,600	0.601	Quote
16019	16000	95	145	16	1	31.05	33.60	4,300	0.904	Quote
6019	6000	95	145	24	1.5	54.45	51.84	4,300	1.230	Quote
6219	6200	95	170	32	2.1	98.10	78.72	3,500	2.640	Quote
6319	6300	95	200	45	3	137.10	114.24	3,100	5.760	Quote
6820	6800	100	125	13	1	17.64	20.35	4,600	0.310	Quote
6920	6900	100	140	20	1.1	36.90	37.92	4,300	0.828	Quote
6020	6000	100	150	24	1.5	54.00	51.84	4,000	1.290	Quote
6220	6200	100	180	34	2.1	109.80	89.28	3,300	3.170	Quote
6821	6800	105	130	13	1	On request	On request	On request	On request	Quote
6921	6900	105	145	20	1.1	42.7	41.9	4,000	0.870	Quote
6021	6000	105	160	26	2	72.50	65.50	4,000	1.590	Quote
6221	6200	105	190	36	2.1	133.00	105.00	3,400	3.700	Quote
6321	6300	105	225	49	3	184.00	153.00	3,000	8.050	Quote
6822	6800	110	140	16	1	28.1	30.7	3,800	0.470	Quote
6922	6900	110	150	20	1.1	43.6	44.4	3,600	0.900	Quote
6022	6000	110	170	28	2	82.00	73.00	3,800	1.960	Quote
6222	6200	110	200	38	2.1	144.00	117.00	3,200	4.360	Quote
6322	6300	110	240	50	3	205.00	179.00	2,900	9.540	Quote
6824	6800	120	150	16	1	28.9	32.9	3,400	0.511	Quote
6924	6900	120	165	22	1.1	57.2	56.9	3,400	1.200	Quote
6024	6000	120	180	28	2	85.00	79.50	3,500	2.070	Quote
6224	6200	120	215	40	2.1	155.00	131.00	2,900	5.150	Quote
6826	6800	130	165	18	1.1	37.9	42.9	3,200	0.748	Quote
6926	6900	130	180	24	1.5	65.1	67.2	3,000	1.600	Quote
6026	6000	130	200	33	2	106.00	101.00	3,200	3.160	Quote
6828	6800	140	175	18	1.1	39.2	46	3,400	0.85	Quote
6928	6900	140	190	24	1.5	66.6	71.2	2,800	1.589	Quote
16028	16000	140	210	22	1.1	On request	On request	On request	On request	Quote
6028	6000	140	210	33	2	111	108	3,000	3.35	Quote
6228	6200	140	250	42	3	On request	On request	On request	On request	Quote
6328	6300	140	300	62	4	251.1	245	2,200	18.5	Quote
6830	6800	150	190	20	1.1	49.1	57.1	3,100	0.98	Quote
6930	6900	150	210	28	2	84.7	90.2	3,000	2.454	Quote
16030	16000	150	225	24	1.1	On request	On request	On request	On request	Quote
6030	6000	150	225	35	2.1	125	125	2,800	4.8	Quote
6230	6200	150	270	45	3	On request	On request	On request	On request	Quote
6330	6300	150	320	65	4	274	284	2,100	22	Quote
6832	6800	160	200	20	1.1	45.2	55.1	2,900	1.187	Quote
6932	6900	160	220	28	2	86.9	95.5	2,800	2.589	Quote
16032	16000	160	240	25	1.5	On request	On request	On request	On request	Quote
6032	6000	160	240	38	2.1	143	144	2,600	5.05	Quote
6232	6200	160	290	48	3	185	186	2,100	11.7	Quote
6332	6300	160	340	68	4	278	286	1,900	26	Quote

Selection notes

Sealed bearing range and series ENRO lists with 2RS seals

A sealed bearing in the ENRO list is a single row deep groove ball bearing offered with 2RS rubber seals on both sides. 175 of the 200 deep groove sizes are listed that way; the rest are listed open or with shields. The table shows how the sealed sizes spread across the series. The 62 and 63 series carry most of them, which matches where sealed bearings are used: hubs, agricultural machinery, conveyors and small motors.

Sealed bearing sizes by series in the ENRO list
Series	Sizes with 2RS seals	Bore range mm
16000	22	12–160
6000	31	10–160
6200	30	10–160
6300	28	10–160
6400	3	17–40
6700	7	10–30
6800	26	10–160
6900	28	10–160

The series digit sets the section for a given bore in the same way as for an open bearing: 60 is light, 62 medium, 63 heavy, 64 extra heavy, and the 160, 67, 68 and 69 series are thin. A sealed bearing of a heavier series has a wider seal and more grease behind it, so for the same bore it usually runs longer in a dirty position before the grease is spent.

2RS or ZZ: which sealed bearing for which site

A sealed bearing is a deep groove ball bearing closed on both sides and greased for life. The two closures behave differently. 2RS rubber contact seals touch the inner ring, so they keep out water and fine dust but add friction and lower the speed limit. ZZ steel shields do not touch the inner ring, so friction and speed are as for an open bearing, but only larger particles are kept out. Use the table to pick, then check the model page for which closures the size is listed with.

Choosing between 2RS seals, ZZ shields and open bearings
Site	Recommended closure	Why
Wheel hubs, agricultural machinery, outdoor conveyors	2RS	Water and grit; speed is low
Washdown areas, food and packaging lines	2RS	Water and cleaning agents
Electric motors in clean plant, fans, pumps in dry rooms	ZZ	Speed matters; contamination is light
Power tools, small spindles	ZZ	High speed, low load
Dusty but hot positions near the grease limit	ZZ	Contact seal friction would add heat
Housings with a grease nipple	Open	Relubricated in service

Sealed bearings cannot normally be relubricated, so grease life is the service life. Every grease has a maximum continuous temperature given on its data sheet, and as a common rule of thumb grease life roughly halves for every 15 °C above about 70 °C, which is why a sealed bearing in a hot position fails by dry running rather than by fatigue. 175 ENRO deep groove ball bearing sizes are listed with 2RS seals; the size table above filters them by bore. The full list is on the deep groove ball bearing page; the bearing supplier page shows every series with its bore range, and the bearing cross reference matches a number from another catalogue by size. We reply within 24 hours on business days.

Variants: open, ZZ, 2RS or NR on the same base number

The closure is a version of the base number, not a different bearing. A 6205, a 6205 ZZ and a 6205 2RS share rings, balls and ratings and fit the same housing; only the closure and the grease fill differ. That is why a sealed bearing can be ordered by taking the number from an open bearing and adding the suffix, and why a shielded bearing can replace a sealed one in an emergency as long as the position is clean. The NR version adds a snap ring groove on the outer ring and is combined with an open, shielded or sealed bearing depending on the maker.

Four versions of one base number
Written as	Closure	Speed limit	Relubrication
6205	Open	Full	Yes, through the housing
6205 ZZ	Two steel shields	Full	No; greased for life
6205 2RS	Two rubber contact seals	Reduced	No; greased for life
6205 NR	Open with snap ring groove	Full	Yes

Clearance is independent of closure: 6205 2RS C3 is a sealed bearing with C3 clearance. The suffix selector walks through the choice; the model page for each size lists which of the four versions ENRO carries. We reply within 24 hours on business days.

Applications

Typical applications by size

6201 12 × 32 × 10 mm Motorcycle wheel hubs, small electric motors 6301 12 × 37 × 12 mm Motorcycle front wheels, small engines 6202 15 × 35 × 11 mm Motorcycle hubs, alternators 6302 15 × 42 × 13 mm Motorcycle wheels, small gearboxes 6203 17 × 40 × 12 mm Motorcycle hubs, water pumps 6204 20 × 47 × 14 mm Motorcycle transmissions, general machinery 6205 25 × 52 × 15 mm Motorcycle hubs, electric motors, pumps 6206 30 × 62 × 16 mm Electric motors, water pumps 6207 35 × 72 × 17 mm Motors, generators 6307 35 × 80 × 21 mm Pumps, agricultural machinery 6208 40 × 80 × 18 mm Motors, industrial machinery 6308 40 × 90 × 23 mm Industrial motors, conveyors 6310 50 × 110 × 27 mm Heavy machinery, gearboxes

Standards and checks

Specifications and boundary dimensions

Built to be checked, not believed. Boundary dimensions follow the ISO 15 dimension series. Ratings follow ISO 281 and clearance groups ISO 5753-1; every value on a model page can be checked against the standard.

ISO 15

Boundary dimensions

Boundary dimensions follow the ISO 15 dimension series. Same base number, same d, D and B.

ISO 492

Tolerances

Defines the tolerance classes for radial bearings. State the class you need on the RFQ.

ISO 5753-1

Internal clearance

Defines the clearance groups C2, CN, C3, C4 and C5. State the group you need on the RFQ.

ISO 281

Rating life

Basis of the L10 basic rating life. Use it with the catalog Cr in our life calculator.

Procurement

Sealed Bearing price: what sets it

Version: Open, shielded (ZZ), sealed (2RS) or snap ring (NR).
Clearance group: CN, C3 or another group. State it per line.
Quantity per line: Quantities per model and whether the order repeats.
Packing and marking: Same color, same box, same label. State any marking requirement per line.
Destination: Port or country the order ships to.

Free samples are available.

What to send

Get a quote for sealed bearings

Model or part number for each line
Quantity per line
Seal or shield, snap ring or bore type
Clearance group, if not CN
Destination port or country

We reply within 24 hours on business days.

Request a Quote

Related pages

Other deep groove ball bearing pages

Application

Electric Motor Bearing

Deep groove ball bearings for electric motor end shields. Shielded (ZZ) or sealed (2RS), with the clearance group stated on your RFQ.

Application

Motorcycle Bearing

Deep groove ball bearings for motorcycle wheel hubs, transmissions and small engines, in 2RS and ZZ versions.

All sizes

Deep Groove Ball Bearing

Every deep groove ball bearing size ENRO lists, in one filterable table.

Tools

Engineering tools built on our catalog data

Bearing Size Finder Find a model from bore, outside diameter and width. Open tool → Bearing Life Calculator Basic rating life L10 and L10h per ISO 281. Open tool → Suffix & Seal Selector Pick shields, seals, snap ring or tapered bore. Open tool → Bearing Size Chart Series-by-series boundary dimension reference. Open tool →

FAQ

Sealed Bearing FAQ

What are sealed bearings?

Sealed bearings have a seal on each side, commonly written 2RS for contact rubber seals. They are greased for life and keep out dust and water better than open or shielded bearings.

What are the disadvantages of sealed bearings?

Contact seals add friction and some heat, so they usually allow a lower speed than open or shielded versions. They cannot normally be relubricated, and the seal lip can be damaged by high temperature or careless mounting.

What is better, sealed or shielded bearings?

Neither in all cases. Rubber seals (2RS) protect better against water and fine dust. Metal shields (ZZ) run with less friction and suit higher speeds in cleaner conditions. Pick by environment and speed.

How long will a sealed bearing last?

Life depends on load, speed, temperature and contamination. Fatigue life can be estimated with the ISO 281 basic rating life (see our life calculator); for sealed bearings the grease life can end service before fatigue does.

Where are ENRO bearings made?

ENRO bearings are Made in China by partner factories, under Japan-managed quality control. Every unit passes 100% outgoing inspection before shipment.

Can you match a part number from another brand?

Send any part number and we'll match the dimensionally equivalent ENRO model. Matching is by boundary dimensions only (dimensionally interchangeable).