Ball Bearing Size Chart: The Ultimate Guide

Among all types of bearings, ball bearings are the most widely used. From deep groove ball bearings to thrust ball bearings and angular contact ball bearings, each model has its own structure, characteristics, and application range. Because different operating environments require different performance, selecting the correct bearing model and size is extremely important.

If you are searching for a ball bearing size chart, it means you are in the process of selecting or replacing a bearing. Understanding the size chart is the first and most critical step to ensure correct selection. Here, I will explain all you want to know about ball bearing size chart. 

Part 1.What is Ball Bearing Size Chart?

First of all, what is ball bearing size chart? A ball bearing size chart is a standardized reference table that lists the key dimensions and technical data of ball bearings. Most ball bearing size chart includes below information:

• Bearing Series
• Inner Diameter (ID / Bore)
• Outer Diameter (OD)
• Width (B)

And some tables also include the below information like: 

• Dynamic Load Rating (C)
• Static Load Rating (C0)
• Limiting Speed
• Weight
• Tolerance Class
• Sealing / Shielding Type
• Material
• Operating Temperature Range
  

Since most ball bearings follow international ISO standards, their dimensions are globally standardized. This allows buyers to:

• Cross-reference bearing numbers across different brands to ensure dimensional compatibility
  
• Replace branded bearings with cost-effective compatible alternatives based on ISO standardized dimensions
  

The size chart is the foundation for correct bearing selection.

Part 2. Ball Bearing Dimension Charts

After understanding what a ball bearing size chart is, I will now show you some of the most popular ball bearing size charts. You may wonder why the full list is not included. The reason is simple: there are too many ball bearing types and series, and it is impossible to display all of them in one single article. If you cannot find the ball bearing you need here, you can contact BKZ Industry sales to obtain the exact model required, as BKZ Industry offers a full range of ball bearings.

Before reviewing the ball bearing size charts below, please note that load ratings and limiting speeds are reference values and may vary depending on the manufacturer, material quality, heat treatment, cage design, internal clearance, sealing type (open/ZZ/2RS), grease type, operating temperature, and installation conditions. For accurate selection and final confirmation, please consult with BKZ Industry.

And before checking all the tables, you need to understand the header meaning of the table:

• Model: The bearing designation that identifies the bearing type/series and bore size (different series may share the same bore but have different OD and width).
• ID (mm): The inner diameter of the bearing, which matches the shaft diameter.
• OD (mm): The outer diameter of the bearing, which matches the housing bore diameter.
• Width (mm): The bearing width (axial thickness), which affects the installation space and load capacity.
• Tolerance: The precision grade of the bearing (P0 is normal accuracy; higher grades like P6/P5 are used for higher speed or higher runout control).
• Weight (kg): The approximate bearing weight for reference in logistics and design.
• Dynamic Load C (kN): The basic dynamic load rating used for bearing life calculation under rotating load conditions.
• Static Load C₀ (kN): The basic static load rating showing the bearing’s resistance to permanent deformation under stationary or shock loads.
• Limiting Speed (r/min, Grease): The maximum recommended speed under grease lubrication; actual allowable speed depends strongly on grease type, clearance, sealing, load, and temperature.

Now, let’s check some size charts for deep groove ball bearings, thrust ball bearings, miniature ball bearings, self-aligning ball bearings, and angular contact ball bearings. 

Deep Groove Ball Bearings (6000. 6200, 6400, 6800, 6900)

6000 Series (Light Series)

Model	ID (mm)	OD (mm)	Width (mm)	Tolerance	Weight (kg)	Dynamic Load C (kN)	Static Load C0 (kN)	Limiting Speed (r/min, Grease)
6000	10	26	8	P0	0.019	4.5	1.95	26000
6001	12	28	8	P0	0.022	5.1	2.4	24000
6002	15	32	9	P0	0.030	5.6	2.8	22000
6003	17	35	10	P0	0.039	6.8	3.35	20000
6004	20	42	12	P0	0.069	9.4	5.0	18000
6005	25	47	12	P0	0.080	10.1	5.9	16000
6006	30	55	13	P0	0.116	13.2	8.0	14000
6007	35	62	14	P0	0.155	16.8	10.3	13000
6008	40	68	15	P0	0.190	19.5	12.0	12000
6009	45	75	16	P0	0.245	22.5	14.5	11000
6010	50	80	16	P0	0.260	23.5	15.8	10000
6011	55	90	18	P0	0.362	29.5	19.0	9500
6012	60	95	18	P0	0.380	31.0	20.0	9000
6013	65	100	18	P0	0.420	33.0	22.0	8500
6014	70	110	20	P0	0.550	38.0	26.0	8000
6015	75	115	20	P0	0.590	41.0	28.0	7500
6016	80	125	22	P0	0.780	48.0	33.0	7000
6017	85	130	22	P0	0.820	50.0	36.0	6800
6018	90	140	24	P0	1.05	57.0	40.0	6500
6019	95	145	24	P0	1.10	60.0	43.0	6200

6200 Series (Medium Series)

Model	ID (mm)	OD (mm)	Width (mm)	Tolerance	Weight (kg)	Dynamic Load C (kN)	Static Load C0 (kN)	Limiting Speed (r/min, Grease)
6200	10	30	9	P0	0.032	6.8	3.05	22000
6201	12	32	10	P0	0.037	7.3	3.5	20000
6202	15	35	11	P0	0.045	7.8	3.75	19000
6203	17	40	12	P0	0.065	9.6	4.8	17000
6204	20	47	14	P0	0.106	12.8	6.65	15000
6205	25	52	15	P0	0.129	14.8	7.8	14000
6206	30	62	16	P0	0.199	19.5	11.2	12000
6207	35	72	17	P0	0.287	25.7	15.3	11000
6208	40	80	18	P0	0.366	29.5	18.0	10000
6209	45	85	19	P0	0.410	31.5	19.5	9500
6210	50	90	20	P0	0.455	35.0	23.0	9000
6211	55	100	21	P0	0.600	43.5	29.0	8500
6212	60	110	22	P0	0.790	52.0	36.0	8000
6213	65	120	23	P0	1.00	57.0	40.0	7500
6214	70	125	24	P0	1.05	60.0	44.0	7200
6215	75	130	25	P0	1.20	66.0	50.0	6800
6216	80	140	26	P0	1.50	72.0	54.0	6500
6217	85	150	28	P0	1.85	83.0	63.0	6000
6218	90	160	30	P0	2.30	95.0	72.0	5600
6219	95	170	32	P0	2.90	108	81.0	5200

6400 Series (Heavy Series)

Model	ID (mm)	OD (mm)	Width (mm)	Tolerance	Weight (kg)	Dynamic Load C (kN)	Static Load C0 (kN)	Limiting Speed (r/min, Grease)
6403	17	62	17	P0	0.26	22.5	11.5	11000
6404	20	72	19	P0	0.40	30.7	15.8	9500
6405	25	80	21	P0	0.54	38.5	20.5	8500
6406	30	90	23	P0	0.75	48.0	27.5	7500
6407	35	100	25	P0	1.05	60.0	36.0	7000
6408	40	110	27	P0	1.45	72.0	44.0	6500
6409	45	120	29	P0	1.95	83.0	52.0	6000
6410	50	130	31	P0	2.55	98.0	65.0	5600
6411	55	140	33	P0	3.20	110	75.0	5200
6412	60	150	35	P0	3.95	125	88.0	4800
6413	65	160	37	P0	4.80	138	100	4500
6414	70	180	42	P0	6.50	165	125	4000
6415	75	190	45	P0	7.50	180	140	3800
6416	80	200	48	P0	8.80	195	160	3600
6417	85	210	52	P0	10.5	210	180	3400
6418	90	225	54	P0	13.0	235	205	3200
6419	95	240	55	P0	15.0	260	230	3000
6420	100	250	58	P0	18.0	280	255	2800
6422	110	280	65	P0	25.0	330	310	2500
6424	120	310	72	P0	35.0	380	360	2200

6800 Series (Thin Section)

Model	ID (mm)	OD (mm)	Width (mm)	Tolerance	Weight (kg)	Dynamic Load C (kN)	Static Load C0 (kN)	Limiting Speed (r/min, Grease)
6800	10	19	5	P0	0.006	1.9	0.9	32000
6801	12	21	5	P0	0.007	2.2	1.05	30000
6802	15	24	5	P0	0.009	2.6	1.25	28000
6803	17	26	5	P0	0.011	3.0	1.45	26000
6804	20	32	7	P0	0.020	5.0	2.7	22000
6805	25	37	7	P0	0.025	5.9	3.4	20000
6806	30	42	7	P0	0.030	6.7	4.1	18000
6807	35	47	7	P0	0.040	7.8	4.8	17000
6808	40	52	7	P0	0.045	8.5	5.2	16000
6809	45	58	7	P0	0.055	9.5	6.0	15000
6810	50	65	7	P0	0.065	10.5	6.8	14000
6811	55	72	9	P0	0.095	13.0	8.5	13000
6812	60	78	10	P0	0.120	15.0	10.0	12000
6813	65	85	10	P0	0.150	17.0	11.5	11000
6814	70	90	10	P0	0.170	18.5	13.0	10500
6815	75	95	10	P0	0.180	19.5	14.0	10000
6816	80	100	10	P0	0.190	21.0	15.5	9500
6817	85	110	13	P0	0.300	26.0	20.0	9000
6818	90	115	13	P0	0.320	28.0	22.0	8500
6819	95	120	13	P0	0.350	30.0	24.0	8000

6900 Series (Slim Series)

Model	ID (mm)	OD (mm)	Width (mm)	Tolerance	Weight (kg)	Dynamic Load C (kN)	Static Load C0 (kN)	Limiting Speed (r/min, Grease)
6900	10	22	6	P0	0.010	2.7	1.25	30000
6901	12	24	6	P0	0.012	3.1	1.55	28000
6902	15	28	7	P0	0.016	4.0	2.0	24000
6903	17	30	7	P0	0.018	4.3	2.15	22000
6904	20	37	9	P0	0.036	7.2	3.8	18000
6905	25	42	9	P0	0.042	8.0	4.5	16000
6906	30	47	9	P0	0.050	9.0	5.2	15000
6907	35	55	10	P0	0.080	12.0	7.0	14000
6908	40	62	12	P0	0.120	15.5	9.5	12000
6909	45	68	12	P0	0.140	17.0	10.5	11000
6910	50	72	12	P0	0.150	18.5	11.5	10500
6911	55	80	13	P0	0.220	22.0	14.0	9500
6912	60	85	13	P0	0.240	24.0	15.5	9000
6913	65	90	13	P0	0.260	26.0	17.0	8500
6914	70	100	16	P0	0.420	33.0	23.0	8000
6915	75	105	16	P0	0.450	35.0	25.0	7600
6916	80	110	16	P0	0.480	37.0	27.0	7200
6917	85	120	18	P0	0.650	42.0	32.0	6800
6918	90	125	18	P0	0.700	45.0	34.0	6500
6919	95	130	18	P0	0.750	47.0	36.0	6200

Thrust Ball Bearings(511, 512 series)

511 Series – Thrust Ball Bearings (Light Thrust Series)

Model	Bore d (mm)	Outside D (mm)	Height H (mm)	Tolerance	Weight (kg)	Dynamic Load C (kN)	Static Load C0 (kN)	Limiting Speed (r/min, Grease)
51100	10	24	9	P0	0.018	5.1	9.5	12000
51101	12	26	9	P0	0.020	5.8	11.0	11000
51102	15	28	9	P0	0.022	6.4	12.8	10000
51103	17	30	9	P0	0.025	7.0	14.5	9500
51104	20	35	10	P0	0.040	8.9	20.0	8500
51105	25	42	11	P0	0.060	12.5	28.0	7500
51106	30	47	11	P0	0.080	15.0	35.5	7000
51107	35	52	12	P0	0.110	18.2	44.0	6500
51108	40	60	13	P0	0.160	22.0	55.0	6000
51109	45	65	14	P0	0.200	25.5	65.0	5500
51110	50	70	14	P0	0.230	29.0	76.0	5000
51111	55	78	16	P0	0.330	35.0	92.0	4500
51112	60	85	17	P0	0.420	41.0	110	4200
51113	65	90	18	P0	0.480	45.0	125	4000
51114	70	95	18	P0	0.520	49.0	140	3800

512 Series – Thrust Ball Bearings (Medium Thrust Series)

Model	Bore d (mm)	Outside D (mm)	Height H (mm)	Tolerance	Weight (kg)	Dynamic Load C (kN)	Static Load C0 (kN)	Limiting Speed (r/min, Grease)
51200	10	26	11	P0	0.030	7.5	15.0	10000
51201	12	28	11	P0	0.032	8.3	17.5	9500
51202	15	32	12	P0	0.045	10.2	23.0	9000
51203	17	35	12	P0	0.050	11.5	26.0	8500
51204	20	40	14	P0	0.080	15.0	36.0	7500
51205	25	47	15	P0	0.120	21.0	50.0	7000
51206	30	52	16	P0	0.160	24.5	62.0	6500
51207	35	62	18	P0	0.260	32.0	80.0	6000
51208	40	68	19	P0	0.320	38.0	98.0	5500
51209	45	73	20	P0	0.380	42.0	110	5200
51210	50	78	22	P0	0.450	48.0	125	5000
51211	55	90	25	P0	0.700	60.0	160	4500
51212	60	95	26	P0	0.800	65.0	175	4200
51213	65	100	27	P0	0.900	70.0	190	4000
51214	70	105	27	P0	0.950	75.0	205	3800

Miniature Ball Bearings(604-698 series)

Model	Bore d (mm)	Outside D (mm)	Width B (mm)	Weight (kg)	Dynamic Load C (kN)	Static Load C0 (kN)	Limiting Speed (r/min, Grease)
604	4	12	4	0.002	0.95	0.36	45000
605	5	14	5	0.004	1.30	0.51	42000
606	6	17	6	0.007	2.05	0.78	38000
607	7	19	6	0.008	2.40	0.95	36000
608	8	22	7	0.012	3.35	1.37	34000
609	9	24	7	0.014	3.60	1.55	32000
623	3	10	4	0.001	0.63	0.24	48000
624	4	13	5	0.003	1.05	0.40	44000
625	5	16	5	0.005	1.70	0.68	40000
626	6	19	6	0.008	2.45	0.98	36000
627	7	22	7	0.013	3.30	1.37	34000
628	8	24	8	0.017	3.90	1.75	32000
629	9	26	8	0.019	4.55	2.05	30000
684	4	9	4	0.001	0.62	0.22	50000
685	5	11	5	0.002	0.90	0.33	48000
686	6	13	5	0.003	1.20	0.46	45000
687	7	14	5	0.004	1.35	0.52	42000
688	8	16	5	0.006	1.70	0.70	40000
689	9	17	5	0.007	1.85	0.78	38000
694	4	11	4	0.0015	0.85	0.32	48000
695	5	13	4	0.002	1.10	0.42	45000
696	6	15	5	0.003	1.55	0.60	42000
697	7	17	5	0.004	1.95	0.78	40000
698	8	19	6	0.007	2.60	1.08	38000

Self-aligning Ball Bearings (1200 / 2200 /2300 Series)

1200 Series – Self-Aligning Ball Bearings

Model	Bore d (mm)	Outside D (mm)	Width B (mm)	Weight (kg)	Dynamic C (kN)	Static C0 (kN)	Speed (r/min, Grease)
1200	10	30	9	0.030	7.2	1.8	22000
1201	12	32	10	0.040	7.8	2.0	20000
1202	15	35	11	0.050	8.9	2.4	19000
1203	17	40	12	0.080	9.6	2.8	17000
1204	20	47	14	0.120	12.5	3.6	15000
1205	25	52	15	0.150	14.8	4.5	14000
1206	30	62	16	0.230	19.5	6.2	12000
1207	35	72	17	0.350	25.5	8.5	11000
1208	40	80	18	0.420	29.0	10.0	10000
1209	45	85	19	0.480	31.5	11.5	9500
1210	50	90	20	0.550	35.0	13.0	9000
1211	55	100	21	0.700	43.0	16.5	8500
1212	60	110	22	0.900	52.0	21.0	8000
1213	65	120	23	1.100	57.0	24.0	7500
1214	70	125	24	1.200	60.0	26.0	7200
1215	75	130	25	1.350	66.0	30.0	6800

2200 Series – Self-Aligning Ball Bearings

Model	Bore d (mm)	Outside D (mm)	Width B (mm)	Weight (kg)	Dynamic C (kN)	Static C0 (kN)	Speed (r/min, Grease)
2200	10	30	14	0.050	9.5	2.8	20000
2201	12	32	14	0.060	10.2	3.1	19000
2202	15	35	14	0.070	11.0	3.6	18000
2203	17	40	16	0.120	14.5	5.0	16000
2204	20	47	18	0.200	19.8	7.2	14000
2205	25	52	18	0.230	21.5	8.2	13000
2206	30	62	20	0.360	28.0	11.5	11000
2207	35	72	23	0.550	35.5	15.0	10000
2208	40	80	23	0.620	39.0	17.5	9500
2209	45	85	23	0.680	42.0	19.0	9000
2210	50	90	23	0.750	45.0	21.0	8500
2211	55	100	25	1.000	57.0	26.0	8000
2212	60	110	28	1.400	70.0	33.0	7500
2213	65	120	31	1.900	83.0	40.0	7000
2214	70	125	31	2.000	90.0	45.0	6800
2215	75	130	31	2.100	95.0	50.0	6500
2216	80	140	33	2.600	110	60.0	6200
2217	85	150	36	3.300	125	72.0	5800
2218	90	160	40	4.200	150	85.0	5400

2300 Series – Self-Aligning Ball Bearings

Model	Bore d (mm)	Outside D (mm)	Width B (mm)	Weight (kg)	Dynamic C (kN)	Static C0 (kN)	Speed (r/min, Grease)
2305	25	62	24	0.450	32.0	12.5	9500
2306	30	72	27	0.700	42.0	17.0	8500
2307	35	80	31	1.000	52.0	22.0	7500
2308	40	90	33	1.400	64.0	27.0	6800
2309	45	100	36	1.900	78.0	33.0	6200
2310	50	110	40	2.500	92.0	40.0	5800
2311	55	120	43	3.200	110	50.0	5200
2312	60	130	46	4.000	125	60.0	4800
2313	65	140	48	5.000	140	72.0	4500
2314	70	150	51	6.200	160	85.0	4200
2315	75	160	55	7.800	180	100	4000
2316	80	170	58	9.500	205	115	3800
2317	85	180	60	11.0	220	130	3600
2318	90	190	64	13.0	250	150	3400
2319	95	200	67	15.5	280	170	3200
2320	100	215	73	19.0	310	195	3000
2322	110	240	80	26.0	380	250	2700
2324	120	260	86	33.0	440	300	2500

Angular Contact Ball Bearings(Single Row/Double Row)

Single Row Angular Contact Ball Bearings (7000 Series)

Model	Bore d (mm)	Outside D (mm)	Width B (mm)	Contact Angle	Weight (kg)	Dynamic Load C (kN)	Static Load C0 (kN)	Limiting Speed (r/min, Grease)
7000	10	26	8	15°/40°	0.018	5.0	2.2	26000
7001	12	28	8	15°/40°	0.020	5.5	2.5	24000
7002	15	32	9	15°/40°	0.030	6.8	3.4	22000
7003	17	35	10	15°/40°	0.040	7.5	3.8	20000
7004	20	42	12	15°/40°	0.070	9.8	5.2	18000
7005	25	47	12	15°/40°	0.080	10.5	5.8	16000
7006	30	55	13	15°/40°	0.120	14.5	8.5	14000
7007	35	62	14	15°/40°	0.160	18.0	11.0	13000
7008	40	68	15	15°/40°	0.200	20.0	13.0	12000
7009	45	75	16	15°/40°	0.260	23.0	15.5	11000
7010	50	80	16	15°/40°	0.280	24.5	17.0	10000
7011	55	90	18	15°/40°	0.380	30.0	21.0	9500
7012	60	95	18	15°/40°	0.400	32.0	23.0	9000
7013	65	100	18	15°/40°	0.420	34.0	25.0	8500
7014	70	110	20	15°/40°	0.600	40.0	30.0	8000
7015	75	115	20	15°/40°	0.650	43.0	33.0	7500
7016	80	125	22	15°/40°	0.900	50.0	40.0	7000
7017	85	130	22	15°/40°	0.950	52.0	42.0	6800
7018	90	140	24	15°/40°	1.200	60.0	50.0	6500
7019	95	145	24	15°/40°	1.300	63.0	53.0	6200

Double Row Angular Contact Ball Bearings (3200 / 3300 Series)

Model	Bore d (mm)	Outside D (mm)	Width B (mm)	Contact Angle	Weight (kg)	Dynamic Load C (kN)	Static Load C0 (kN)	Limiting Speed (r/min, Grease)
3200	10	30	14	30°	0.050	9.5	4.8	18000
3201	12	32	15	30°	0.060	10.5	5.5	17000
3202	15	35	15	30°	0.070	12.0	6.5	16000
3203	17	40	17	30°	0.120	15.5	8.5	15000
3204	20	47	20	30°	0.200	21.0	12.5	13000
3205	25	52	20	30°	0.230	23.0	14.0	12000
3206	30	62	23	30°	0.360	30.0	19.0	11000
3207	35	72	27	30°	0.600	40.0	26.0	10000
3208	40	80	30	30°	0.800	50.0	34.0	9000
3209	45	85	30	30°	0.900	55.0	38.0	8500
3210	50	90	30	30°	1.000	60.0	42.0	8000
3305	25	62	25	30°	0.350	30.5	19.5	11000
3306	30	72	30	30°	0.600	41.0	28.0	9500
3307	35	80	34	30°	0.900	52.0	37.0	8500
3308	40	90	36	30°	1.200	64.0	46.0	7800
3309	45	100	39	30°	1.600	75.0	55.0	7000
3310	50	110	44	30°	2.100	92.0	70.0	6500
3311	55	120	49	30°	2.700	110	85.0	6000
3312	60	130	54	30°	3.400	125	100	5600
3313	65	140	58	30°	4.200	145	120	5200

Part 3. Problems of Choosing Wrong Ball Bearings

Now that you have reviewed the ball bearing size charts, you may be ready to select the required model. However, before making a final decision, you must clearly understand the serious consequences of choosing the wrong ball bearing.

If the bearing selection is incorrect, the impact can be significant. Even when the installation dimensions (ID, OD, and width) match, improper load rating, internal clearance, precision grade, or bearing type selection can still lead to performance and reliability problems.

• Increased Friction, Overheating and Reduced Life Service

If the bearing load rating is too low, or the internal clearance is not suitable, friction will increase during operation.

Higher friction generates excessive heat, which accelerates grease deterioration and surface wear. As a result, the bearing service life will be much shorter than expected, and the shaft may also be damaged.

• Reduced Efficiency with Frequent Stops

Wrong ball bearings may not support the required radial or axial load properly. This can cause unstable rotation, increased resistance, and frequent shutdowns. In industrial applications, this directly reduces production efficiency and increases maintenance costs.

• Vibration and Noise

Improper precision grade, poor fit tolerance, or incorrect bearing type can lead to abnormal vibration and noise. This is especially critical in electric motors, office equipment, and household appliances where quiet operation is required.

• Safety Problems

In heavy-duty machinery, bearing failure may cause shaft seizure, sudden machine stoppage, or even mechanical damage. In some cases, it can create serious safety risks for operators and equipment.

With so many potential problems, choosing the correct ball bearing is extremely important. If you are unsure which model is suitable for your application, we highly recommend contacting BKZ Industry sales for professional selection advice and technical support.

Part 4. How to Choose the Ball Bearing?

If you are confident that you can select the ball bearing by yourself, you can follow the steps below to make a proper and professional selection.

Step 1. Understand Your Application
First, clearly define your working conditions:

• Radial or axial load
  
• Load magnitude
  
• Speed (RPM)
  
• Working temperature
  
• Working environment (dust, water, vibration, etc.)
  
• Installation space

Understanding these factors is critical because bearing type, clearance, precision grade, and sealing structure are all determined by real operating conditions — not only by size.

Step 2. Measure the Required Size and Specifications

Accurately measure:

• Shaft diameter (bearing inner diameter requirement)
• Housing bore size (outer diameter requirement)
• Available installation width
• Fit tolerance between shaft and housing
• Required service life (if calculation is needed)

Correct measurement is the foundation of proper bearing selection.

Step 3. Check the Ball Bearing Size Chart
Based on shaft diameter, housing size, and width limitation, find the suitable model in the ball bearing size chart.

If you are not sure, you can send your application information to BKZ Industry sales for professional selection support.

Step 4. Confirm with the Manufacturer
Confirm important technical details such as:

• Internal clearance (C0, C3, etc.)
  
• Precision class (P0, P6, P5)
  
• Sealing type (ZZ, 2RS, open)
  
• Lubrication type
  

This ensures the bearing matches your real working conditions.

Step 4. Test Samples
Buy some samples for testing before bulk order.

Step 5. Place Bulk Order
After verification, proceed with bulk purchasing.

Correct selection can reduce failure risk, improve efficiency, and extend service life.

Part 5. How Do I Measure Ball Bearing?

From the steps of choosing ball bearings, you can see that measurement is one of the most important steps.

If you want to find the correct bearing from the ball bearing size chart, the first and most critical step is obtaining accurate dimensions. Even a small measurement error may lead to wrong selection, improper fit, abnormal heat generation, vibration, or early bearing failure.

There are different situations depending on whether you have the old bearing.

If You Have the Old Bearing

The easiest and most reliable way is to measure the existing bearing directly.

There are three critical dimensions for any standard ball bearing:

• Inner Diameter (ID)
  
• Outer Diameter (OD)
  
• Width (B)

Step 1: Measure Inner Diameter (ID)
Measure the bore (inside hole) of the bearing using:

• Vernier caliper (recommended)
  
• Micrometer (for higher precision requirement)
  

Do NOT use a ruler. Even a small error will result in choosing the wrong model.

Step 2: Measure Outer Diameter (OD)
Measure the external diameter carefully. Make sure the caliper is straight and fully in contact with the outer ring.

Step 3: Measure the Width (B)
Measure the total thickness of the bearing. Different bearing series may share the same bore size but have different widths.

Once you have the three dimensions (ID × OD × Width), you can search the ball bearing size chart to identify the correct bearing number.

Example:
25 × 52 × 15 mm → 6205 bearing.

This is the most common method for bearing replacement.

If You Know the Bearing Series

If the bearing number is still visible, such as 6204-2RS, the process is much easier.

You can directly search the model number in the ball bearing size chart to confirm:

• Dimensions
  
• Dynamic load rating (C)
  
• Static load rating (C0)
  
• Limiting speed
  
• Seal or shield type
  

This avoids measurement errors and ensures fast and accurate confirmation.

If You Do NOT Have the Old Bearing

If the old bearing is missing, damaged, or you are designing a new project, you must measure the machine components instead of the bearing itself.

In this case, you need to measure the installation positions:

Step 1: Measure the Shaft Diameter
Use a vernier caliper or micrometer to measure the shaft where the bearing inner ring will be installed. This dimension determines the bearing inner diameter (ID).

Step 2: Measure the Housing Bore Diameter
Measure the internal diameter of the housing where the outer ring will fit. This dimension determines the bearing outer diameter (OD).

Step 3: Measure the Available Installation Width
Measure the axial space available for the bearing. This determines the maximum allowable bearing width (B).

After confirming the installation dimensions, you must also determine:

• Radial load
  
• Axial (thrust) load
  
• Rotating speed (RPM)
  
• Working temperature
  
• Working environment (dust, water, chemicals, vibration, etc.)
  

These parameters are critical because bearing selection is not only based on dimension, but also on load capacity, speed capability, clearance class, and sealing design.

With this complete information, a professional bearing manufacturer can calculate and recommend the correct model. For example, you can contact BKZ Industry sales for technical recommendation to ensure the bearing is correctly selected for your application.

Part 6. Applications for Ball Bearings

Ball bearings are widely used in various industries because of their low friction, high speed capability, and simple structure. According to different load and working conditions, they can be applied in light-duty, medium-duty, and heavy-duty industries.

Low-Duty Industry

In light-load and high-speed applications, ball bearings are commonly used in:

• Household appliances
  
• Electric fans
  
• Office equipment
  

These applications usually require low noise, smooth rotation, and stable performance.

Medium-Duty Industry

For moderate load and continuous operation conditions, ball bearings are widely used in:

• Electric motors
  
• Pumps
  
• Agricultural equipment
  

In these environments, bearings must provide stable load capacity, reliable sealing, and long service life.

Heavy-Duty Industry

In higher load and more demanding working environments, ball bearings are applied in:

• Gearboxes
  
• Steel industry machinery
  
• Mining equipment
  
• Construction machinery
  

These applications require proper load rating selection, suitable clearance, and strong sealing performance to ensure reliability under harsh conditions.

Part 7. FAQS about Ball Bearing Size Chart

Q1. How to Download Ball Bearing Size Chart in PDF?

The complete ball bearing size chart PDF is usually very large and includes many bearing series and technical data. Most companies do not publish the full version online.

If you cannot find the ball bearing you need from the downloaded PDF ball bearing size chart, you can contact a manufacturer like BKZ Industry to request the specific series you need.

Q2. How to Get Ball Bearing Size Chart for SKF?

You can visit SKF official website here to get the ball bearing size chart. If you want to find the ball bearing  that meets your requirement with the same quality and lower price, you can contact BKZ Industry to get the ball bearing you need directly. 

Final Words

A ball bearing size chart is not just a table of dimensions. It is a technical selection tool that directly affects machine reliability, efficiency, and service life.

Always confirm dimensions, load ratings, speed limits, and working conditions before purchasing. If you are not fully confident in your selection, BKZ Industry is ready to support you with professional bearing solutions.