{"id":452849,"date":"2026-08-12T11:34:39","date_gmt":"2026-08-12T03:34:39","guid":{"rendered":"https:\/\/www.usubearings.com\/?p=452849"},"modified":"2026-08-12T11:49:26","modified_gmt":"2026-08-12T03:49:26","slug":"guide-to-bearing-numbers","status":"publish","type":"post","link":"https:\/\/www.usubearings.com\/chinese\/guide-to-bearing-numbers\/","title":{"rendered":"How to Read Bearing Numbers? A Simplified Guide to Bearing Numbers"},"content":{"rendered":"
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When selecting bearings for industrial equipment, many buyers face a common question:<\/p>

What do the numbers and letters on a bearing mean?<\/strong><\/p>

Every bearing has a unique identification code, usually consisting of numbers and letters. This bearing designation provides important information about the bearing type, dimensions, internal structure, sealing method, and material.<\/p>

Understanding how to read bearing numbers<\/strong> helps engineers, distributors, and purchasing managers select the correct bearing model and avoid costly mistakes.<\/p>

In this article, USU Bearings explains the meaning of bearing numbers using S 6200 2RS<\/strong> as an example.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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What Information Is Included in a Bearing Number?<\/strong><\/h2>

A typical bearing code contains three main parts:<\/p>

Prefix + Basic Bearing Number + Suffix<\/p>

For example:S 6200 2RS<\/strong><\/p>

The bearing designation can be divided as follows:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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S 6200 2RS<\/th>\t\t\t\t<\/tr>\n\t\t\t<\/thead>\n\t\t\t\t\t\t
Part<\/td>Code<\/td>Meaning<\/td><\/tr>
Prefix<\/td>S<\/td>Bearing material or special design feature<\/td><\/tr>
Basic Number<\/td>6200<\/td>Bearing type, series and bore size<\/td><\/tr>
Suffix<\/td>2RS<\/td>Seal configuration<\/td>\t\t\t\t<\/tr>\n\t\t\t<\/tbody>\n\t\t<\/table>\n\t\t\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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By understanding each part, you can quickly identify the specifications of a bearing.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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1.Understanding the Bearing Prefix<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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The prefix is usually placed before the main bearing number.<\/p>

It is used to describe special materials, designs, or manufacturing features defined by the bearing manufacturer.<\/p>

For example: S 6200 2RS<\/p>

The prefix “S” indicates that the bearing is made with stainless steel components.<\/p>

Stainless steel bearings are commonly used in applications requiring:<\/p>

\u00b7 Corrosion resistance<\/p>

\u00b7 Clean operating environments<\/p>

\u00b7 Moisture resistance<\/p>

\u00b7 Food processing equipment<\/p>

\u00b7 Chemical machinery<\/p>

Different manufacturers may use different prefixes, so buyers should always confirm the meaning with the bearing supplier before ordering.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Common bearing type codes<\/th>\t\t\t\t<\/tr>\n\t\t\t<\/thead>\n\t\t\t\t\t\t
First Digit<\/td>Bearing Type<\/td><\/tr>
1<\/td>Self-aligning ball bearing<\/td><\/tr>
2<\/td>Spherical roller bearing<\/td><\/tr>
3<\/td>Tapered roller bearing<\/td><\/tr>
4<\/td>Double row ball bearing<\/td><\/tr>
5<\/td>Thrust bearing<\/td><\/tr>
6<\/td>Single row deep groove ball bearing<\/td><\/tr>
7<\/td>Cylindrical roller bearing<\/td><\/tr>
8<\/td>Cylindrical roller bearing<\/td>\t\t\t\t<\/tr>\n\t\t\t<\/tbody>\n\t\t<\/table>\n\t\t\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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2. Understanding the Basic Bearing Number<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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The basic bearing number is the most important part of bearing identification.<\/p>

In our example:6200<\/p>

The basic number contains information about:<\/p>

\u00b7 Bearing type<\/p>

\u00b7 Bearing series<\/p>

\u00b7 Bore diameter<\/p>

Let’s analyze each number step by step.<\/p>

The First Digit: Bearing Type<\/strong><\/h5>

The first digit of the bearing number indicates the bearing category.<\/p>

Common bearing type codes include:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Common bearing type codes<\/th>\t\t\t\t<\/tr>\n\t\t\t<\/thead>\n\t\t\t\t\t\t
First Digit<\/td>Bearing Type<\/td><\/tr>
1<\/td>Self-aligning ball bearing<\/td><\/tr>
2<\/td>Spherical roller bearing<\/td><\/tr>
3<\/td>Tapered roller bearing<\/td><\/tr>
4<\/td>Double row ball bearing<\/td><\/tr>
5<\/td>Thrust bearing<\/td><\/tr>
6<\/td>Single row deep groove ball bearing<\/td><\/tr>
7<\/td>Cylindrical roller bearing<\/td><\/tr>
8<\/td>Cylindrical roller bearing<\/td>\t\t\t\t<\/tr>\n\t\t\t<\/tbody>\n\t\t<\/table>\n\t\t\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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In our example:6200<\/p>

The first digit is:6\uff0cThis means the bearing is a Single row deep groove ball bearing<\/p>

Deep groove ball bearings are the most widely used bearing type because they can support both radial and moderate axial loads.<\/p>

The Second Digit: Bearing Series<\/strong><\/h4>

The second digit represents the bearing series.<\/p>

The series indicates the bearing’s load capacity, size and strength.<\/p>

For example:6200,<\/strong>the second digit is\u201c2<\/strong>\u201d\uff0cthis represents a light series bearing<\/strong>.<\/p>

\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Common bearing series classifications<\/th>\t\t\t\t<\/tr>\n\t\t\t<\/thead>\n\t\t\t\t\t\t
Series Code<\/td>Description<\/td><\/tr>
1<\/td>Extra light series<\/td><\/tr>
2<\/td>Light series<\/td><\/tr>
3<\/td>Medium series<\/td><\/tr>
4<\/td>Heavy series<\/td>\t\t\t\t<\/tr>\n\t\t\t<\/tbody>\n\t\t<\/table>\n\t\t\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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A higher series number usually means a stronger bearing with higher load capacity.<\/p>

The Last Two Digits: Bearing Bore Size<\/strong><\/h4>

The last two digits indicate the bearing bore diameter (inner diameter).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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standard metric bearings<\/th>\t\t\t\t<\/tr>\n\t\t\t<\/thead>\n\t\t\t\t\t\t
Code<\/td>Bore Diameter<\/td><\/tr>
00<\/td>10 mm<\/td><\/tr>
01<\/td>12 mm<\/td><\/tr>
02<\/td>15 mm<\/td><\/tr>
4<\/td>17mm<\/td><\/tr>
04 and above<\/td>Code \u00d7 5 mm<\/td>\t\t\t\t<\/tr>\n\t\t\t<\/tbody>\n\t\t<\/table>\n\t\t\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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The suffix appears after the basic bearing number.<\/p>

It describes additional features such as:Seal type\u3001Shield type\u3001Internal clearance\u3001Lubrication\u3001Special design.<\/p>

In our example:2RS\uff0c<\/strong>the suffix means:Two rubber seals on both sides of the bearing.<\/p>

Explanation:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Bearing Suffix Codes<\/th>\t\t\t\t<\/tr>\n\t\t\t<\/thead>\n\t\t\t\t\t\t
Code<\/td>Meaning<\/td><\/tr>
Z<\/td>Single metal shield<\/td><\/tr>
ZZ<\/td>Double metal shields<\/td><\/tr>
RS<\/td>Single rubber seal<\/td><\/tr>
2RS<\/td>Double rubber seals<\/td><\/tr>
C3<\/td>Increased internal clearance<\/td>\t\t\t\t<\/tr>\n\t\t\t<\/tbody>\n\t\t<\/table>\n\t\t\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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The 2RS sealed bearing is widely used because the rubber seals help prevent:<\/p>

\u00b7 Dust contamination<\/p>

\u00b7 Moisture entering the bearing<\/p>

\u00b7 Lubricant leakage<\/p>

Complete Meaning of S 6200 2RS<\/h4>

After decoding all parts, we can understand the full bearing specification:<\/p>

S 6200 2RS means:<\/strong><\/p>

  • S<\/strong> \u2192 Stainless steel bearing design<\/li>
  • 6<\/strong> \u2192 Single row deep groove ball bearing<\/li>
  • 2<\/strong> \u2192 Light series<\/li>
  • 00<\/strong> \u2192 10 mm bore diameter<\/li>
  • 2RS<\/strong> \u2192 Rubber seals on both sides<\/li><\/ul>

    Therefore:<\/p>

    S 6200 2RS is a stainless steel single row deep groove ball bearing, light series, with a 10 mm inner diameter and double rubber seals.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    How Can USU Bearings Help You Choose the Right Bearing?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    As a professional bearing supplier in China, USU Bearings provides deep groove ball bearings, tapered roller bearings, angular contact bearings, cylindrical roller bearings, and customized OEM bearing solutions.<\/p>

    We support:<\/p>

    \u00b7 Standard bearing supply<\/p>

    \u00b7 OEM\/private label service<\/p>

    \u00b7 Customized packaging<\/p>

    \u00b7 Technical consultation<\/p>

    If you are unsure about a bearing model, simply send us:<\/p>

    \u00b7 Bearing number<\/p>

    \u00b7 Application information<\/p>

    \u00b7 Required quantity<\/p>

    Our team can help you confirm the correct bearing solution.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    Learn how to read bearing numbers and understand bearing codes, prefixes, basic numbers, and suffixes. This guide explains bearing designation with S 6200 2RS examples.<\/p>","protected":false},"author":1,"featured_media":452929,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[50482,1],"tags":[],"class_list":["post-452849","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bearing-knowledge","category-news"],"_links":{"self":[{"href":"https:\/\/www.usubearings.com\/chinese\/wp-json\/wp\/v2\/posts\/452849","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.usubearings.com\/chinese\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.usubearings.com\/chinese\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.usubearings.com\/chinese\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.usubearings.com\/chinese\/wp-json\/wp\/v2\/comments?post=452849"}],"version-history":[{"count":45,"href":"https:\/\/www.usubearings.com\/chinese\/wp-json\/wp\/v2\/posts\/452849\/revisions"}],"predecessor-version":[{"id":452942,"href":"https:\/\/www.usubearings.com\/chinese\/wp-json\/wp\/v2\/posts\/452849\/revisions\/452942"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.usubearings.com\/chinese\/wp-json\/wp\/v2\/media\/452929"}],"wp:attachment":[{"href":"https:\/\/www.usubearings.com\/chinese\/wp-json\/wp\/v2\/media?parent=452849"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.usubearings.com\/chinese\/wp-json\/wp\/v2\/categories?post=452849"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.usubearings.com\/chinese\/wp-json\/wp\/v2\/tags?post=452849"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}