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Ball Bearing Size Chart 2026: How to Select the Right Ball Bearings for Agricultural Machinery and Excavators

Wednesday, July 1, 2026

Struggling with buying the right ball bearings for your agricultural equipment, excavators, construction machinery, and other rotating components? You’ve come to the right place. In this guide, we’ll talk about the ball bearing sizes chart, how to measure bearing dimensions, and how to choose the correct ball bearings at Sparkling Machinery.

Table of Contents

≡

I. What Is a Ball Bearing?
II. What Is a Bearing Size Chart?
Ball Bearing Size Chart
6200 Series
6300 Series
6000 Series
III. How to Measure the Ball Bearings Myself?
IV. Tips for Selecting the Right Bearings with Ball Bearing Size Chart
V. How Can You Source the Right Ball Bearings at Sparkling Machinery?
VI. The End

I. What Is a Ball Bearing?

Deep groove ball bearings are essential components in many industrial and machinery applications. Their ability to reduce friction between moving surfaces and support both radial and axial loads in two directions makes them a common choice for electric motors, water pumps, gearboxes, agricultural equipment, excavators, and other heavy-duty rotating assemblies.

In excavators and construction machinery, ball bearings are used in track rollers, idlers, pulleys, hydraulic pump shafts, transmission systems, and various pivot points. Even under high load, vibration, and dusty working conditions, the right bearing can help maintain smooth operation and extend service life.

Large industrial ball bearing on a construction site with an excavator

II. What Is a Bearing Size Chart?

A bearing size chart is a standardized reference table that matches bearing part numbers to their three core physical dimensions: bore diameter (d), outer diameter (D), and width (B or T). The chart may also include load ratings, speed limits, and other technical specifications. These measurements are normally taken in millimeters, but can also be converted to inches. In fact, most manufacturers and suppliers offer bearing measurements in both imperial and metric systems.

The ball bearing size charts are issued by reputed manufacturers, including SKF, NSK, NTN, and aligned to ISO dimensional standards. Two bearings carrying the same ISO part number from different brands will have identical outer dimensions. They will physically fit the same shaft and housing.

Ball Bearing Size Chart

Ball bearings are available in a wide range of sizes, depending on the shaft diameter, housing dimensions, and application requirements. Below are size charts for some of the most widely used ball bearing series.

6200 Series

Size	Inner (d)/mm	Outer (D)/mm	Width (B)/mm	Size	Inner (d)/mm	Outer (D)/mm	Width (B)/mm
6200	10	30	9	6214	70	125	24
6201	12	32	10	6215	75	130	25
6202	15	35	11	6216	80	140	26
6203	17	40	12	6217	85	150	28
6204	20	47	14	6218	90	160	30
6205	25	52	15	6219	95	170	32
6206	30	62	16	6220	100	180	34
6207	35	72	17	6221	105	190	36
6208	40	80	15	6222	110	200	38
6209	45	85	19	6224	120	215	40
6210	50	90	20	6226	130	230	40
6211	55	100	21	6228	140	250	42
6212	60	110	22	6230	150	270	45

6300 Series

Size	Inner (d)/mm	Outer (D)/mm	Width (B)/mm	Size	Inner (d)/mm	Outer (D)/mm	Width (B)/mm
6300	10	35	11	6313	65	140	33
6301	12	37	12	6314	70	150	35
6302	15	42	13	6315	75	160	37
6303	17	47	14	6316	80	170	39
6304	20	50	15	6317	85	180	41
6305	25	62	17	6318	90	190	43
6306	30	72	19	6319	95	200	45
6307	35	80	21	6320	100	215	47
6308	40	90	23	6321	105	225	49
6309	45	100	25	6322	110	240	50
6310	50	110	27	6324	120	260	55
6311	55	120	29	6326	130	280	58
6312	60	130	31	6328	140	300	62

6000 Series

Size	Inner (d)/mm	Outer (D)/mm	Width (B)/mm	Size	Inner (d)/mm	Outer (D)/mm	Width (B)/mm
6000	10	26	8	6013	65	100	18
6001	12	28	8	6014	70	110	20
6002	15	32	9	6015	75	115	20
6003	17	35	10	6016	80	125	22
6004	20	42	12	6017	85	130	22
6005	25	47	12	6018	90	140	24
6006	30	55	13	6019	95	145	24
6007	35	62	14	6020	100	150	24
6008	40	68	15	6021	105	160	26
6009	45	75	16	6022	110	170	28
6010	50	90	16	6024	120	180	28
6011	55	90	18	6026	130	200	33
6012	60	95	18	6028	140	210	33

Data sourced from SKF Rolling Bearings Catalogue.

III. How to Measure the Ball Bearings Myself?

It is not uncommon for bearing numbers to become illegible or completely worn after long-term use, especially on excavators, farm tractors, and construction equipment that operate in dusty, high-vibration environments. You can measure the size manually with a vernier caliper. A ruler can also be used for preliminary checks.

The steps are as follows:

1. Measure the inner diameter first: Insert the outside anvils of the caliper into the inner ring of the bearing. Make sure it fits just from edge to edge and is not tight or applying pressure on the bearing. Or, measure the inner circle of the bearing from end to end with a ruler.
2. Measure the outer diameter: Place the bearing in the jaws of the caliper until it fits perfectly. Or measure the bearing from one outside edge to the other with a ruler.
3. Repeat the last step for the width of the bearing.
4. Use a bearing size chart to find the bearing series number.

IV. Tips for Selecting the Right Bearings with Ball Bearing Size Chart

1. Start with shaft diameter. Bore (d) is always first. Everything else follows.
2. Measure the housing directly. Housing bores wear over time. Measure the housing itself, not the old bearing’s OD.
3. Check the speed limit before finalizing. Sealed bearings have a lower speed limit than open equivalents. Confirm your RPM is below the rated maximum for the specific variant you are ordering.
4. Verify all three dimensions when cross-referencing brands. Part number alone is not enough. d, D, and B must all match.
5. For excavators and heavy machinery, also consider load type, vibration levels, sealing requirements, and operating temperature. Bearings used in track rollers, idlers, and hydraulic pump shafts may require higher load capacity and better dust protection.

V. How Can You Source the Right Ball Bearings at Sparkling Machinery?

Sparkling Machinery provides an extensive selection of ball bearings for agricultural machinery, excavators, construction equipment, and other rotating components. All bearings in our selection are built to rigorous standards to ensure reliable performance in demanding working conditions.

You can simply enter the part names, model numbers, or part numbers to find your ball bearings. If you have difficulty finding the exact one, please feel free to contact us. Our friendly parts specialists are standing by to assist with any of your parts needs.

VI. The End

Finding the right ball bearings for agricultural machinery and excavators is straightforward if you start with the bore, outer diameter, and width. Match those to your shaft and housing, verify the load ratings cover your application, confirm you are within the speed limit, and the bearing will fit and run as expected.

A smarter option is to choose reliable aftermarket suppliers such as Sparkling Machinery. You needn’t measure those three numbers and match them with the ball bearing size chart alone. We can help match bearings to your specific equipment needs using part numbers and model numbers.

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FAQ

faq

Do you offer customized parts?

Yes, we offer tailored solutions to meet specific customer requirements. Whether you need custom dimensions or specialized features, we can design and produce parts that perfectly match your excavator’s needs.

What is the lead time for receiving excavator parts?

Our typical lead time depends on the complexity and quantity of the order. For standard parts, delivery usually takes between 7 to 14 days. For custom orders, the lead time may vary, but we always strive to ensure timely delivery.

How do you ensure the quality of your parts?

We follow strict quality control procedures throughout the manufacturing process. Our parts are tested for durability, performance, and precision to ensure they meet industry standards and exceed customer expectations.

What types of excavator parts do you manufacture?

We manufacture a wide range of excavator parts, including hydraulic components, undercarriage parts, engine parts, wear parts, and more. Our products are designed to fit a variety of excavator models and are built to meet the highest quality standards.

Are your products covered by a warranty?

Yes, all of our excavator parts come with a warranty to ensure quality and reliability. The warranty period may vary depending on the type of part. Please contact us for detailed warranty terms for specific products.

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After 15 years of hard work, SPARKLING has focused on the production, sales and service of excavator accessories and has established a strong sales network around the world; we have many agents in different countries.

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