Bearing Manufacturer & Supplier

Specialize in ball bearings, roller bearings, thrust bearings, thin section bearings etc.

Follow me on:

Guide to Ball Bearing Size Charts

Bearings are one of the most indispensable components in any industrial machinery. There is a legend that “bearings are the food of industry”. These high-precision ball bearings are essential for reducing friction and carrying loads during rotational motion. You should have at least one bearing in many industrial applications. There are many bearing manufacturers in the world, such as SKF, FAG, NST, NTN, etc., who produce thousands of types of bearings, including ball bearings, cylindrical roller bearings, tapered roller bearings, needle roller bearings, thrust ball bearings, and self-aligning bearings. Roller bearings, thin section bearings and automotive bearings, etc. Among them, ball bearings are the most common bearings, but each model has its own characteristics and advantages, making it only suitable for certain specific uses and applications and not suitable for other operating environments.

Proper selection and installation of bearings is very important to ensure optimal machine performance. The right bearings not only improve the performance of your machine, but also extend its service life while reducing downtime and maintenance costs. On the contrary, choosing the wrong bearing may increase power consumption, increase maintenance, greatly reduce the efficiency of the machine, and may even lead to expensive downtime. If you don’t consult a bearing expert when it comes to bearing selection, you may be paying the price. However, choosing the right bearing for the application is not always easy. There are many different factors to consider when selecting a bearing, such as speed, load and operating conditions.

The first thing to consider when selecting a bearing is the available mounting space. No matter how well a bearing fits your application requirements, if there is no available space, it cannot be installed. The available space will determine the bore and outer diameter of the bearing you choose, so it is important to know this information before selecting a bearing. It plays a key role in selecting the right bearing for a specific application, ensuring optimal performance and service life of your equipment. To this end, AUB has summarized the size table of the most widely used ball bearings based on many years of bearing manufacturing experience, allowing you to understand the dimensions of manufacturing ball bearings at a glance.

What are the dimensions of a standard ball bearing?

Standard ball bearing dimensions vary widely depending on the type of bearing and application. Ball bearings are used in all industries and therefore need to be sized for applications ranging from skateboard wheels to offshore drilling rigs. So, how are standard bearing sizes determined? Generally speaking, ball bearing dimensions are measured by inner diameter, outer diameter, and width; bearing measurements are completed in the following order: ID x OD x W. These measurements are usually in millimeters and inches. In fact, most manufacturers and suppliers offer bearing measurements in both imperial and metric systems. Each combination of measurements corresponds to a bearing serial number. Ball bearing size charts can be used to find measurements for a specific bearing. Of these, the 6200 and 6300 series are the most commonly used ball bearings, typically ranging in size from 10 x 30 x 9 mm (0.394 x 1.181 x 0.354 in) to 150 x 320 x 65 mm (5.906 x 12.598 x 2.559 in).

Bearing clearance

It is worth noting that you also need to know the clearance of the bearing: normal clearance, no suffix; C3 is greater than the normal clearance. C3 clearance allows bearings to run faster and at higher temperatures without failure. Of course, you can also customize clearances, so if you have a special type of bearing, please contact us.

C2: Below standard;
C3: Larger gap;
C4: larger than C3.

Bearing seals and shields

Chance often hears about bearing guards and seals, which protect the inside of the bearing from debris or contaminants; these include open, sealed on both sides (-2RS), sealed on one side (-RS), shielded on both sides ( -ZZ), one side shield (-Z) and retaining ring (NR). Both metal guards and rubber seals can be used individually to protect only one side of the bearing or both sides, depending on your application requirements.

Common metric size ball bearings include:

6000 series: aperture range 10 mm
6200 series: hole diameter range 10 to 30 mm
6300 Series: Bore diameter range 10 to 35 mm
6800 series: bore diameter range 10 to 80 mm
6900 Series: Bore diameter range 10 to 100 mm

For imperial sizes, common series include:

R Series: Bore diameter 0.1875 to 0.5 inches
1600 Series: Bore size range 0.1875 to 0.5 in.
16000 Series: Bore diameter range 10.319 to 12.7 mm
63000 Series: Bore diameter range 10.319 to 12.7 mm

Main parameters included in the bearing size charts

Bearing dimensions. Dimensional charts provide basic measurements for ball bearings such as bore diameter (inner diameter), outer diameter, and width. These dimensions determine the bearing’s compatibility with its intended shaft and housing.
specified load. Ball bearings bear radial and axial loads during operation. The load rating in the dimension table indicates the maximum load capacity the bearing can withstand before premature failure.
Speed rating. The speed class defines the maximum speed at which a bearing can operate without causing excessive heating or premature wear.
clearance. Bearing clearance is the internal clearance between the balls and raceways. It affects the axial and radial clearance as well as the thermal expansion characteristics of the bearing.

6000 series bearings size charts

The main dimensions of the ball bearings of the 6000 series comply with DIN 625-1. The small ball bearings of the 6000 series can support radial loads despite their low weight. Compared with the deep groove ball bearings of the 6300 medium series, with the same inner diameter, the 6000 series bearings require smaller installation space, weigh only half of the deep groove ball bearings of the 63 medium series, and allow higher rotational speeds. Often used in electric motors.

Size	Inner Dimension (mm)	Outer Dimension (mm)	Width (mm)	Dynamic (Cr)	Static (Cor)	Weight (lb)
6000	10	26	8	1030	445	0.042
6001	12	28	8	1147	535	0.048
6002	15	32	9	1254	641	0.068
6003	17	35	10	1349	731	0.088
6004	20	42	12	2109	1129	0.150
6005	25	47	12	2248	1315	0.172
6006	30	55	13	2967	1866	0.242
6007	35	62	14	3642	2360	0.0326
6008	40	68	15	3867	2653	0.407
6009	45	75	16	4721	3327	0.506
6010	50	80	16	4946	3642	.0568
6011	55	90	18	6789	4901	.0796
6012	60	95	18	7081	5440	.0847
6013	65	100	18	6857	5665	0.957
6014	70	110	20	8565	6947	1.324
6015	75	115	20	8902	7531	1.404
6016	80	125	22	10701	8947	1.870
6017	85	130	22	11128	9689	1.958
6018	90	140	24	13084	11173	2.552
6019	95	145	24	13578	12117	2.662
6020	100	150	24	13533	12185	2.750
6021	105	160	26	16254	14792	3.498
6022	110	170	28	18434	16411	4.312
6024	120	180	28	18659	17535	4.796
6026	130	200	33	23380	22481	7.326
6028	140	210	33	24279	24279	7.832
6030	150	225	35	27427	28101	9.636

6200 series bearings size charts

The main dimensions of 6200 series ball bearings comply with DIN 625-1 standards. The 6200 lightweight series ball bearings are also lighter in weight but can still support relatively higher radial loads than the 6000 series. Compared with the 63 and 64 series deep groove ball bearings, the outer diameter of the 6200 series ball bearings is relatively smaller, so it requires less installation space under the same inner diameter and allows slightly higher rotational speeds. 6200 series ball bearings are commonly used in food processing, household appliances, chemical and pharmaceutical industries, motorcycles, pumps, fans, water treatment and many other industrial applications

Size	Inner Dimension (mm)	Outer Dimension (mm)	Width (mm)	Dynamic (Cr)	Static (Cor)	Weight (lb)
6200	10	30	9	1147	535	0.070
6201	12	32	10	1533	686	0.077
6202	15	35	11	1720	836	0.099
6203	17	40	12	2154	1075	0.141
6204	20	47	14	2878	1495	0.227
6205	25	52	15	3147	1771	0.279
6206	30	62	16	4384	2585	0.440
6207	35	72	17	5733	3417	0.634
6208	40	80	15	6632	4047	0.810
6209	45	85	19	7081	4609	0.915
6210	50	90	20	7868	5216	1.019
6211	55	100	21	9757	6609	1.335
6212	60	110	22	11780	8138	1.723
6213	65	120	23	12859	9015	2.178
6214	70	125	24	13983	9914	2.354
6215	75	130	25	15152	10858	2.596
6216	80	140	26	16344	11915	3.080
6217	85	150	28	18884	13916	3.938
6218	90	160	30	21604	16074	4.730
6219	95	170	32	24504	18412	5.764
6220	100	180	34	27427	20930	6.908
6221	105	190	36	29899	23605	8.140
6222	110	200	38	32372	26303	9.592
6224	120	215	40	32822	27427	12.386
6226	130	230	40	37318	32822	13.728
6228	140	250	42	39566	37318	17.754
6230	150	270	45	39566	38217	22.660

6300 series bearings size charts

The main dimensions of 6300 series ball bearings comply with DIN 625-1 standards. Ball bearings in the 63 medium series provide a balanced ratio between radial load carrying capacity, required installation space, weight and permitted rotational speed. Therefore, 6300 ball bearings are one of the most versatile bearings. The functionality of the 6300 series is similar to that of the 6200 series. The use of larger balls combined with larger raceway sizes allows the bearings to withstand greater radial and thrust loads for a given bore size. The 6300 Series is available in open, shielded, sealed or snap-ring versions upon request. The 6300 Series features larger balls and heavier races to provide greater radial, thrust and combined load capabilities. 6300 Series Commonly used in food processing, household appliances, chemical and pharmaceutical industries, motorcycles, pumps, fans, water treatment and many other industrial applications

Size	Inner Dimension (mm)	Outer Dimension (mm)	Width (mm)	Dynamic (Cr)	Static (Cor)	Weight (lb)
6300	10	35	11	1720	782	0.12
6301	12	37	12	2185	1142	0.13
6302	15	42	13	2585	1218	0.18
6303	17	47	14	3035	1479	0.24
6304	20	52	15	3552	1771	0.31
6305	25	62	17	4991	2585	0.48
6306	30	72	19	6070	3417	0.77
6307	35	80	21	7464	4316	1.00
6308	40	90	23	9172	5395	1.41
6309	45	100	25	11870	7149	1.92
6310	50	110	27	13938	8610	2.35
6311	55	120	29	16096	10116	3.01
6312	60	130	31	18412	11735	3.74
6313	65	140	33	20840	13466	4.58
6314	70	150	35	23380	15322	5.54
6315	75	160	37	25403	17355	6.64
6316	80	170	39	27651	19491	7.90
6317	85	180	41	29899	21761	9.31
6318	90	190	43	32148	24054	10.80
6319	95	200	45	34396	26752	12.47
6320	100	215	47	38892	31698	15.40
6321	105	225	49	41365	34396	17.71
6322	110	240	50	46086	40465	20.99
6324	120	260	55	47659	42714	28.16
6326	130	280	58	51256	48559	40.26
6328	140	300	62	57326	55078	49.06
6330	150	320	65	64070	67442	58.74

6400 series bearings size charts

The main dimensions of 6400 series ball bearings comply with DIN 625-1 standards. Compared to 60, 62 and 63 series deep groove ball bearings, 64 series ball bearings can handle higher load ratings for the same bore diameter. For example, they have twice the load-carrying capacity compared to 62 lightweight series deep groove ball bearings. AUB manufactures bearings to meet virtually any operating accuracy requirement and application speed: AUB manufactures deep groove ball bearings with Abec tolerances of 1-9, internal clearances from C2 to C4, and a variety of different cage designs, including J-type , W type, RJ type, TW type, etc.

Item #	(d) Bore Diameter	(D) Outer Diameter	(B) Width	Seal	Internal Clearance
6403-2RS	17mm	62mm	17mm	2RS	CN
6403-OIL	17mm	62mm	17mm	open	CN
6403-ZZ	17mm	62mm	17mm	ZZ	CN
6404-2RS	20mm	72mm	19mm	2RS	CN
6404-OIL	20mm	72mm	19mm	open	CN
6404-ZZ	20mm	72mm	19mm	ZZ	CN
6405-2RS	25mm	80mm	21mm	2RS	CN
6405-OIL	25mm	80mm	21mm	open	CN
6405-Z	25mm	80mm	21mm	Z	CN
6405-ZZ	25mm	80mm	21mm	ZZ	CN

6700 series bearings size charts

The main dimensions of the 6700 series thin section ball bearings comply with DIN 625-1 standards. Series 67 bearings are still smaller than Series 68 thin-section bearings, which have an ultra-thin square cross-section for the same bore diameter. Their outer diameter is very small compared to their inner diameter, and they are very narrow. Therefore, relatively large shafts and shaft diameters can be installed in extremely limited installation spaces, suitable for relatively high speeds.

Size	Inner Dimension (mm)	Outer Dimension (mm)	Width (mm)	Dynamic (Cr)	Static (Cor)	Weight (lb)
6701	12	18	4	205	119	0.004
6702	15	21	4	191	110	0.005
6703	17	23	4	216	137	0.006
6704	20	27	4	232	162	0.010
6705	25	32	4	246	187	0.015
6706	30	37	4	263	220	0.018
6707	35	44	5	416	366	0.021

6800 series bearings size charts

The main dimensions of 6800 thin section ball bearings comply with DIN 625-1 standards. The 68 series thin-section bearings are still smaller in size than the 69 series thin-section bearings, with an ultra-thin square cross-section at the same inner diameter. Their outer diameter is very small compared to their inner diameter, and they are very narrow. Therefore, the relatively large shaft and shaft diameter of the 6800 thin-section ball bearing can be installed in an extremely limited installation space, is very light, and is suitable for relatively high speeds.

Size	Inner Dimension (mm)	Outer Dimension (mm)	Width (mm)	Dynamic (Cr)	Static (Cor)	Weight (lb)
6800	10	19	5	411	208	0.011
6801	12	21	5	432	234	0.0132
6802	15	24	5	468	286	0.0154
6803	17	26	5	632	387	0.0176
6804	20	32	7	899	555	0.0418
6805	47	37	7	967	663	0.0484
6806	30	42	7	1057	821	0.0572
6807	35	47	7	1102	910	0.0638
6808	40	52	7	1113	944	0.0726
6809	45	58	7	1394	1214	0.088
6810	50	65	7	1484	1371	0.1144
6811	55	72	9	1978	1821	0.1826
6812	60	78	10	2585	2383	0.2288
6813	65	85	10	2675	2585	0.2772
6814	70	90	10	2720	2675	0.2948
6815	75	95	10	2810	2900	0.3124
6816	80	100	10	2855	2990	0.33
6817	85	110	13	4204	4271	0.5852
6818	90	115	13	4271	4429	0.6138
6819	95	120	13	4339	4429	1.551
6820	100	125	13	4406	4766	0.6798
6821	105	130	13	4451	5373	0.7128
6822	110	140	16	6317	6902	1.3332
6824	120	150	16	6519	7419	1.441
6826	130	165	18	8295	9262	2.0658
6828	140	175	18	8588	9981	2.2
6830	150	190	20	10746	12342	3.08

6900 series bearings size charts

The main dimensions of the 6900 series thin section ball bearings comply with DIN 625-1 standards. Series 69 thin section bearings are significantly smaller than Series 60, 62, 63 and 64 deep groove ball bearings with a thin square cross-section of the same bore diameter. As a result, relatively large shafts and shaft diameters can be installed in extremely limited installation spaces. They are very light and suitable for relatively high speeds.

Rubber seals (RS/2RS) provide optimal sealing action and increased friction. Metal seals (Z/ZZ) are suitable for higher speeds, but since they are non-contact seals their sealing effect is limited. Open sealless bearings are suitable for very high speeds and are easier to re-lubricate. However, they are susceptible to staining.

Size	Inner Dimension (mm)	Outer Dimension (mm)	Width (mm)	Dynamic (Cr)	Static (Cor)	Weight (lb)
6900	10	22	6	652	326	0.010
6901	12	24	6	967	506	0.011
6902	15	28	7	1034	573	0.017
6903	17	30	7	1428	832	0.018
6904	20	37	9	1574	1023	0.036
6905	47	42	9	1630	1124	0.041
6906	30	47	9	2450	1742	0.045
6907	35	55	10	3080	2237	0.073
6908	40	62	12	3170	2450	0.112
6909	45	68	12	3260	2630	0.132
6910	50	72	12	3732	3170	0.133
6911	55	80	13	4541	3889	0.185
6912	60	85	13	3912	3619	0.104
6913	65	90	13	5328	4766	0.211
6914	70	100	16	5485	5081	0.342
6915	75	105	16	5620	5395	0.363
6916	80	110	16	7171	6654	0.382
6917	85	120	18	7374	7104	0.535
6918	90	125	18	7576	7531	0.565
6919	95	130	18	10116	9419	0.705
6920	100	140	20	10454	10071	0.960
6921	105	145	20	10768	10746	1.000
6922	110	150	20	12859	12792	1.040
6924	120	165	22	15647	15737	1.410
6926	130	180	24	16029	16816	1.860
6928	140	190	24	20997	21199	1.980
6930	150	210	28	21000	326	3.050

Why do bearings come in so many sizes?

As mentioned previously, bearing size depends on the size of the shaft and the application requirements. Bearing size can greatly affect the performance and capabilities of a ball bearing; therefore, different industries use different sizes. Generally speaking, smaller ball bearings have limited load capabilities. They are used in applications where space efficiency is important than load capacity. Miniature bearings are typically constructed as precision ball bearings and are used in extremely small applications such as medical instruments, robotics, or semiconductor equipment. On the other hand, larger bearings have greater load capacity. They are used in heavy industry such as agricultural machinery, mining and drilling equipment or heavy power tools. Many manufacturers also offer custom bearing size options for very specific applications with unique requirements.

What are the consequences of mismatched bearing sizes?

When selecting the appropriate ball bearing, be sure to use the bearing size chart to find the appropriate size for your application. If the bearing size does not match the application, serious problems will occur:

Fast wear due to friction
Reduced efficiency
Overheating
Vibration and noise
Frequent breakdowns and downtime
Security risks

Increased friction and wear

Choosing an inappropriate bearing size can cause misalignment between the bearing and the shaft and increase friction, which can cause rapid wear and deterioration of bearing components, significantly shortening their service life.

Reduced efficiency

If the bearing size is too small or too large, the bearing may not distribute the load evenly. Uneven load distribution can cause the bearing to operate inefficiently because the bearing may not be able to handle the applied forces and rotations as expected. As a result, mechanical efficiency may be affected, resulting in reduced overall performance.

Overheat

Improperly sized bearings may not dissipate heat effectively. Excessive heat can be generated due to friction, causing the bearings and surrounding components to overheat. Increased temperatures can reduce lubricant performance, weaken materials, and ultimately lead to bearing failure.

Vibration and noise

Bearings with mismatched dimensions can cause vibration and noise during operation. These vibrations not only affect the smoothness of the machinery but can also cause structural damage over time. Additionally, the resulting noise may be a sign of misalignment or uneven load distribution, indicating potential problems with bearing performance.

Frequent breakdowns and downtime

Bearings that do not meet dimensional requirements are likely to fail prematurely. Replacing failed bearings and resolving the resulting problems can cause costly downtime in industrial processes, impacting productivity and profitability.

Security Risk

In critical applications such as automotive or aerospace systems, the use of improperly sized bearings can pose serious safety risks. Sudden failure caused by bearing mismatch can lead to accidents, especially at high speeds or high loads, endangering the safety of equipment and personnel.

To avoid these problems, it is critical to consult the bearing manufacturer’s specifications and appropriate dimensional charts when selecting bearings for any application. The right choice ensures optimal performance, longevity and safety of your machinery or system.