Bearing Size Chart

This bearing size chart lists 107 metric bearings by bore d, outside diameter D and width, in three families: deep groove ball, tapered roller and spherical roller. Enter what you measured in the finder above or read down the tables, then copy the model and its three figures into your inquiry. For tapered roller bearings the third figure is the total width T.

How to use this bearing size chart

The chart has one table per family, and every row gives the model, the bore d, the outside diameter D and the width in millimetres:

• Deep groove ball bearings: 16004 and 16005, 6000 to 6020, 6200 to 6220, 6300 to 6320 and 6403 to 6408.
• Tapered roller bearings: 30204 to 30212, 30304 to 30308, 30310 and 32205 to 32212.
• Spherical roller bearings: 22205 to 22213, 22215, 22217, 22220 and 23022.

There are two ways in. If you have a model number, type its first digits in the Model box; a suffix typed after it is ignored, so 6205-2RS finds 6205. If you have a used bearing or a drawing, enter whichever dimensions you know. Bore and outside diameter together usually leave between one and four candidates, and the width settles it.

The bearing size finder does no arithmetic. It compares your figures with the sizes in the table and keeps the rows within the tolerance you choose: ±0.1, ±0.5 or ±1 mm, with ±0.5 mm as the default. That makes it a lookup, not a bearing size calculator or a bearing dimensions calculator, and the answer is only as good as the table behind it. Every size in the chart was checked against at least two published size tables before it was listed, so a few common models are not here yet.

Bearing dimensions chart symbols: d, D, B and T

A bearing dimensions chart gives three of the boundary dimensions: bore d, outside diameter D and width. The fourth boundary dimension is the chamfer r at the ring corners, which a size inquiry rarely needs [1]. For metric bearings these dimensions are set in general plans: ISO 15 for radial bearings other than tapered roller bearings, and ISO 355 for tapered roller bearings [1]. Bearings made to the general plans share the same boundary dimensions when the bore and the dimension series are the same, and that is what lets you replace one maker’s bearing with another’s by size [1].

The width letter depends on the bearing type. Deep groove ball and spherical roller bearings carry one width figure, the width B [1]. A single-row tapered roller bearing has three: B for the inner ring, C for the outer ring and T for the whole bearing [3].

The figures in a standard table are nominal dimensions [2] [3]. A new bearing differs from them within its tolerance class, and a worn one differs further, which is why the finder matches within a tolerance instead of looking for an exact figure.

Ball bearing size chart: reading the model number

The ball bearing size chart above covers the 160, 60, 62, 63 and 64 series. On these bearings the model number already tells you the bore:

• The first digit, 6, is the bearing type: single row deep groove ball bearing [1].
• The next digit or digits give the dimension series. In a full code the first is the width series and the second the diameter series, and in a few designations the width digit is left out, as in 62 and 63 [1].
• The last two digits are the size code. The size code multiplied by five gives the bore in millimetres, so 05 means a 25 mm bore [1].
• Codes 00, 01, 02 and 03 are the exceptions and stand for bores of 10, 12, 15 and 17 mm [1].

For each bore the general plan offers several outside diameters, and the series digits choose between them [1]. The five deep groove ball bearings with a 25 mm bore show how far apart they sit:

Model	Bore (mm)	OD (mm)	Width (mm)
16005	25	47	8
6005	25	47	12
6205	25	52	15
6305	25	62	17
6405	25	80	21

With a 25 mm bore, the outside diameter runs from 47 mm on the 16005 and 6005 to 80 mm on the 6405, and the width from 8 mm on the 16005 to 21 mm on the 6405. A shaft size alone therefore does not identify a ball bearing; the housing bore and the space along the shaft decide which series fits.

Bores of 22, 28 and 32 mm fall outside the size-code rule and are written with a slash, for example 62/22 [1]. They are not in this chart. A ZZ or 2RS suffix does not change the size: the FULI catalogue lists the ZZ and 2RS versions on the same line as the open bearing, so where a sealed version exists it has the same d, D and B.

Tapered roller bearing widths: quote the total width T

Tapered roller bearings need the most care in a size inquiry, because their width has three possible meanings. The inner ring with its rollers and cage (the cone) and the outer ring (the cup) are separate parts, and a cone and cup with the same designation interchange with each other [1]. Each part has its own width: the inner ring width B, the outer ring width C, and the total width T of the assembled bearing [3].

The tapered roller table in this chart gives T, because T decides whether the bearing fits the space between the shaft shoulder and the housing. When we cross-checked the tapered roller sizes, the published values that disagreed with the majority were the inner ring width B printed in the width column instead of the total width T.

Two tapered roller bearings with the same bore and outside diameter can differ only in T. 30206 is 30 x 62 x 17.25 mm and 32206 is 30 x 62 x 21.25 mm, both with T as the third figure. If you enter only the bore and outside diameter, the finder returns both. Measure T over the assembled bearing, cone and cup together, and we recommend writing the letter in the inquiry: “30206, 30 x 62 x 17.25 mm (T)”.

Find bearing by dimensions you measured

To find bearing by dimensions from a used part, measure it the way the table is built:

1. Clean the bearing and measure the bore with a caliper at two points across the ring, then the outside diameter, then the width.
2. Enter the readings as you took them, not rounded, and keep the default tolerance of ±0.5 mm.
3. If two rows remain, look at the bearing type: balls or rollers, straight rollers or tapered ones, one row or two.
4. If no row matches at ±1 mm, the bearing is probably not one of the standard metric sizes in this chart.

For a bearing measured in inches, switch the unit to inch; the finder converts at 1 inch = 25.4 mm. The tables themselves are metric, so an inch-series bearing will not match. Inch-bore insert bearings for pillow blocks are listed on the inch bore pillow block page.

A shaft measurement on its own leaves several answers. With a 25 mm shaft, the 6005, 6205, 6305 and 6405 each fit the shaft, and only the outside diameter and width tell them apart.

What to put on a size-based RFQ

An inquiry that carries both the model and the size can be quoted without a round of questions. For each line, give:

• the model with its full suffix, for example 6205-2RS;
• bore d x outside diameter D x width in millimetres, and for tapered roller bearings the letter T after the width;
• the quantity and the machine the bearing goes into.

For a part that matches no row, send the caliper readings, a photo of each face and any marking you can still read, or a drawing if you have one. Backed by 20+ years of bearing export experience in Linqing, Shandong. Pre-shipment batch checks cover rotation smoothness, dimensions, grease fill, rust and appearance. Contact sales@fuli-bearings.com with the list and we will confirm the sizes line by line.

Sources

1. https://www.skf.com/binaries/pub12/Images/0901d196802809de-Rolling-bearings---17000_1-EN_tcm_12-121486.pdf
2. https://cdn.standards.iteh.ai/samples/69977/9ac39b8b79a94b74b35cba8868eabe4f/ISO-15-2017.pdf
3. https://cdn.standards.iteh.ai/samples/73836/21cd4e7a3909498fa3888571da53779c/ISO-355-2019.pdf