![\"\"](\"https:\/\/www.loyal.sg\/file\/upload\/201901\/15\/175427891.png\" "\\"\\"")
<\/p>\n0 Double row angular contact ball bearing<\/h2>\n<\/div>\n<\/div>\n1 Self-aligning ball bearing<\/div>\n2 Spherical roller bearing, spherical roller thrust bearing<\/div>\n3 Tapered roller bearing<\/div>\n4 Double row deep groove ball bearing<\/div>\n5 Thrust ball bearing<\/div>\n6 Single row deep groove ball bearing<\/div>\n7 Single row angular contact ball bearing<\/div>\n8 Cylindrical roller thrust bearing<\/div>\nC CARB toroidal roller bearing<\/div>\nN Cylindrical roller bearing. Two or more letters are used to identify the number of the rows or the configuration of the flanges, e.g. NJ, NU, NUP, NN, NNU, NNCF<\/div>\nQJ Four-point contact ball bearing<\/div>\nT Tapered roller bearing\u00a0 in accordance with\u00a0 ISO 355<\/div>\nPrefixes and suffixes identify design features or bearing components.<\/p>\n
\n
\n
\n
\n
\n
Pronunciation of the basic designation<\/strong><\/h2>\n![\"\"](\"https:\/\/www.loyal.sg\/file\/upload\/201901\/15\/175326541.png\" "\\"\\"")
The summary of the digits within the basic type should follow the breakdown of the bearing
\ndesignation. The digit groups of the dimension series and bore code should be separated.
\nDesignation system
\nPrefixes
\nBasic designation
\nSuffix – Internal design
\nSuffix – External design (seals, snap ring groove, etc.)
\nSuffix – Cage design
\nSuffix – Materials, heat treatment
\nSuffix – Tolerance, clearance, preload, quiet running
\nSuffix – Bearing sets, matched bearings
\nSuffix – Stabilization
\nSuffix – Lubrication
\nSuffix – Other variants
\nBasic designation
\nSuffix – Internal design
\nComposition of Bearing Designations
\nThe last two digits of the basic designation identify the size code of the bearing bore. The size code multiplied by 5 gives the bore diameter (d) in mm.
\nThe most important exceptions in the basic bearing designation system are:
\nIn a few cases the digit for the bearing type or the first digit of the dimension series identification is omitted. These digits are shown in brackets in table 1.
\nBearings with a bore diameter of 10, 12, 15 or 17 mm have the following size code identifications:
\n00 = 10 mm
\n01 = 12 mm
\n02 = 15 mm
\n03 = 17 mm
\nFor bearings with a bore diameter < 10 mm, or \u2265 500 mm, the bore diameter is generally given in millimetres (uncoded). The size identification is separated from the rest of the bearing designation by an oblique stroke, e.g. 618\/8 (d = 8 mm) or 511\/530 (d = 530 mm). This is also true for standard bearings in accordance with ISO 15 that have a bore diameter of 22, 28 or 32 mm, e.g. 62\/22 (d = 22 mm).
\nFor some bearings with a bore diameter < 10 mm, such as deep groove, self-aligning and angular contact ball bearings, the bore diameter is also given in millimetres (uncoded) but is not separated from the series designation by an oblique stroke, e.g. 629 or 129 (d = 9 mm).
\nBore diameters that deviate from the standard bore diameter of a bearing are uncoded and given in millimetres up to three decimal places. This bore diameter identification is part of the basic designation and is separated from the basic designation by an oblique stroke, e.g. 6202\/15.875 (d = 15,875 mm = 5\/8 in).
\nBearing series
\nBearing series designations consist of an identification for the bearing type and the dimension series. The most common series designations are shown . The digits in brackets belong to the system, but are not used in the series designation in practice.
\nPrefixes and suffixes
\nThe designations of most SKF rolling bearings follow a system that consists of a basic designation with or without one or more prefixes and\/or suffixes, as shown in the table and the examples below.
\nPrefixes and suffixes provide additional information about the bearing.
\nPrefixes are mainly used to identify components of a bearing. They can also identify bearing variants.
\nSuffixes identify designs or variants, which differ in some way from the original design or from the current basic design. The suffixes are divided into groups. When more than one special feature is to be identified, suffixes are provided in the order shown in the table below.
\nDetails of the significance of specific prefixes and suffixes are given in the relevant product sections.
\nDesignation system
\nBearing designations not covered by the basic system
\nInsert bearings
\nThe designations for insert bearings differ somewhat from those described in the basic designation system and are covered in the relevant product section.
\nNeedle roller bearings
\nThe designations for needle roller bearings do not fully follow the basic designation system and are covered in the relevant product section.
\nTapered roller bearings
\nThe designations for metric tapered roller bearings follow either the basic designation system or a designation system, established by ISO in 1977, covered in ISO 3551).<\/p>\n
Inch tapered roller bearings are designated in accordance with the relevant ANSI\/ABMA standard.<\/p>\n
Customized bearings
\nBearings designed to meet a specific customer requirement are typically designated by a drawing number. The drawing number does not provide any information about the bearing.
\nOther rolling bearings
\nRolling bearings not covered in the Ball bearings and Roller bearings sections, such as super-precision bearings, thin section bearings, slewing bearings or linear bearings, follow designation systems that can differ significantly from the basic designation system.<\/p>\n","protected":false},"excerpt":{"rendered":"
Bearing dimensions and designationsBearing dimensions\uff1aA basic designation typically contains three to five digits. The basic designation system . The number and letter combinations have the following<\/p>\n","protected":false},"author":1,"featured_media":87,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-86","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-case-studies"],"yoast_head":"\n
Bearing dimensions and designations - Loyal Bearings<\/title>\n<meta name=\"description\" content=\"Bearing dimensions and designationsBearing dimensions\uff1aA basic designation typically contains three to five digits. The basic designation system . The number and letter combinations have the following\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.loyal.sg\/article\/s44\/bearing-dimensions-and-designations.html\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Bearing dimensions and designations\" \/>\n<meta property=\"og:description\" content=\"Bearing dimensions and designationsBearing dimensions\uff1aA basic designation typically contains three to five digits. The basic designation system . The number and letter combinations have the following\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.loyal.sg\/article\/s44\/bearing-dimensions-and-designations.html\" \/>\n<meta property=\"og:site_name\" content=\"Loyal Bearings\" \/>\n<meta property=\"article:published_time\" content=\"2024-07-12T06:21:59+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-07-13T04:11:06+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.loyal.sg\/article\/wp-content\/uploads\/2024\/07\/bearing-dimensions-and-designations.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1\" \/>\n\t<meta property=\"og:image:height\" content=\"1\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.loyal.sg\/article\/s44\/bearing-dimensions-and-designations.html\",\"url\":\"https:\/\/www.loyal.sg\/article\/s44\/bearing-dimensions-and-designations.html\",\"name\":\"Bearing dimensions and designations - Loyal Bearings\",\"isPartOf\":{\"@id\":\"https:\/\/www.loyal.sg\/article\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.loyal.sg\/article\/s44\/bearing-dimensions-and-designations.html#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.loyal.sg\/article\/s44\/bearing-dimensions-and-designations.html#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.loyal.sg\/article\/wp-content\/uploads\/2024\/07\/bearing-dimensions-and-designations.png\",\"datePublished\":\"2024-07-12T06:21:59+00:00\",\"dateModified\":\"2024-07-13T04:11:06+00:00\",\"author\":{\"@id\":\"https:\/\/www.loyal.sg\/article\/#\/schema\/person\/110a466a1ad2b1a34e532e60b8a9ced2\"},\"description\":\"Bearing dimensions and designationsBearing dimensions\uff1aA basic designation typically contains three to five digits. 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Prefixes and suffixes identify design features or bearing components.<\/p>\n
\n
\n
\n
\n
\n
Pronunciation of the basic designation<\/strong><\/h2>\nThe summary of the digits within the basic type should follow the breakdown of the bearing
\ndesignation. The digit groups of the dimension series and bore code should be separated.
\nDesignation system
\nPrefixes
\nBasic designation
\nSuffix – Internal design
\nSuffix – External design (seals, snap ring groove, etc.)
\nSuffix – Cage design
\nSuffix – Materials, heat treatment
\nSuffix – Tolerance, clearance, preload, quiet running
\nSuffix – Bearing sets, matched bearings
\nSuffix – Stabilization
\nSuffix – Lubrication
\nSuffix – Other variants
\nBasic designation
\nSuffix – Internal design
\nComposition of Bearing Designations
\nThe last two digits of the basic designation identify the size code of the bearing bore. The size code multiplied by 5 gives the bore diameter (d) in mm.
\nThe most important exceptions in the basic bearing designation system are:
\nIn a few cases the digit for the bearing type or the first digit of the dimension series identification is omitted. These digits are shown in brackets in table 1.
\nBearings with a bore diameter of 10, 12, 15 or 17 mm have the following size code identifications:
\n00 = 10 mm
\n01 = 12 mm
\n02 = 15 mm
\n03 = 17 mm
\nFor bearings with a bore diameter < 10 mm, or \u2265 500 mm, the bore diameter is generally given in millimetres (uncoded). The size identification is separated from the rest of the bearing designation by an oblique stroke, e.g. 618\/8 (d = 8 mm) or 511\/530 (d = 530 mm). This is also true for standard bearings in accordance with ISO 15 that have a bore diameter of 22, 28 or 32 mm, e.g. 62\/22 (d = 22 mm).
\nFor some bearings with a bore diameter < 10 mm, such as deep groove, self-aligning and angular contact ball bearings, the bore diameter is also given in millimetres (uncoded) but is not separated from the series designation by an oblique stroke, e.g. 629 or 129 (d = 9 mm).
\nBore diameters that deviate from the standard bore diameter of a bearing are uncoded and given in millimetres up to three decimal places. This bore diameter identification is part of the basic designation and is separated from the basic designation by an oblique stroke, e.g. 6202\/15.875 (d = 15,875 mm = 5\/8 in).
\nBearing series
\nBearing series designations consist of an identification for the bearing type and the dimension series. The most common series designations are shown . The digits in brackets belong to the system, but are not used in the series designation in practice.
\nPrefixes and suffixes
\nThe designations of most SKF rolling bearings follow a system that consists of a basic designation with or without one or more prefixes and\/or suffixes, as shown in the table and the examples below.
\nPrefixes and suffixes provide additional information about the bearing.
\nPrefixes are mainly used to identify components of a bearing. They can also identify bearing variants.
\nSuffixes identify designs or variants, which differ in some way from the original design or from the current basic design. The suffixes are divided into groups. When more than one special feature is to be identified, suffixes are provided in the order shown in the table below.
\nDetails of the significance of specific prefixes and suffixes are given in the relevant product sections.
\nDesignation system
\nBearing designations not covered by the basic system
\nInsert bearings
\nThe designations for insert bearings differ somewhat from those described in the basic designation system and are covered in the relevant product section.
\nNeedle roller bearings
\nThe designations for needle roller bearings do not fully follow the basic designation system and are covered in the relevant product section.
\nTapered roller bearings
\nThe designations for metric tapered roller bearings follow either the basic designation system or a designation system, established by ISO in 1977, covered in ISO 3551).<\/p>\n
Inch tapered roller bearings are designated in accordance with the relevant ANSI\/ABMA standard.<\/p>\n
Customized bearings
\nBearings designed to meet a specific customer requirement are typically designated by a drawing number. The drawing number does not provide any information about the bearing.
\nOther rolling bearings
\nRolling bearings not covered in the Ball bearings and Roller bearings sections, such as super-precision bearings, thin section bearings, slewing bearings or linear bearings, follow designation systems that can differ significantly from the basic designation system.<\/p>\n","protected":false},"excerpt":{"rendered":"
Bearing dimensions and designationsBearing dimensions\uff1aA basic designation typically contains three to five digits. The basic designation system . The number and letter combinations have the following<\/p>\n","protected":false},"author":1,"featured_media":87,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-86","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-case-studies"],"yoast_head":"\n
Bearing dimensions and designations - Loyal Bearings<\/title>\n<meta name=\"description\" content=\"Bearing dimensions and designationsBearing dimensions\uff1aA basic designation typically contains three to five digits. The basic designation system . The number and letter combinations have the following\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.loyal.sg\/article\/s44\/bearing-dimensions-and-designations.html\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Bearing dimensions and designations\" \/>\n<meta property=\"og:description\" content=\"Bearing dimensions and designationsBearing dimensions\uff1aA basic designation typically contains three to five digits. The basic designation system . 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The basic designation system . 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The summary of the digits within the basic type should follow the breakdown of the bearing\ndesignation. The digit groups of the dimension series and bore code should be separated.
\nDesignation system
\nPrefixes
\nBasic designation
\nSuffix – Internal design
\nSuffix – External design (seals, snap ring groove, etc.)
\nSuffix – Cage design
\nSuffix – Materials, heat treatment
\nSuffix – Tolerance, clearance, preload, quiet running
\nSuffix – Bearing sets, matched bearings
\nSuffix – Stabilization
\nSuffix – Lubrication
\nSuffix – Other variants
\nBasic designation
\nSuffix – Internal design
\nComposition of Bearing Designations
\nThe last two digits of the basic designation identify the size code of the bearing bore. The size code multiplied by 5 gives the bore diameter (d) in mm.
\nThe most important exceptions in the basic bearing designation system are:
\nIn a few cases the digit for the bearing type or the first digit of the dimension series identification is omitted. These digits are shown in brackets in table 1.
\nBearings with a bore diameter of 10, 12, 15 or 17 mm have the following size code identifications:
\n00 = 10 mm
\n01 = 12 mm
\n02 = 15 mm
\n03 = 17 mm
\nFor bearings with a bore diameter < 10 mm, or \u2265 500 mm, the bore diameter is generally given in millimetres (uncoded). The size identification is separated from the rest of the bearing designation by an oblique stroke, e.g. 618\/8 (d = 8 mm) or 511\/530 (d = 530 mm). This is also true for standard bearings in accordance with ISO 15 that have a bore diameter of 22, 28 or 32 mm, e.g. 62\/22 (d = 22 mm).
\nFor some bearings with a bore diameter < 10 mm, such as deep groove, self-aligning and angular contact ball bearings, the bore diameter is also given in millimetres (uncoded) but is not separated from the series designation by an oblique stroke, e.g. 629 or 129 (d = 9 mm).
\nBore diameters that deviate from the standard bore diameter of a bearing are uncoded and given in millimetres up to three decimal places. This bore diameter identification is part of the basic designation and is separated from the basic designation by an oblique stroke, e.g. 6202\/15.875 (d = 15,875 mm = 5\/8 in).
\nBearing series
\nBearing series designations consist of an identification for the bearing type and the dimension series. The most common series designations are shown . The digits in brackets belong to the system, but are not used in the series designation in practice.
\nPrefixes and suffixes
\nThe designations of most SKF rolling bearings follow a system that consists of a basic designation with or without one or more prefixes and\/or suffixes, as shown in the table and the examples below.
\nPrefixes and suffixes provide additional information about the bearing.
\nPrefixes are mainly used to identify components of a bearing. They can also identify bearing variants.
\nSuffixes identify designs or variants, which differ in some way from the original design or from the current basic design. The suffixes are divided into groups. When more than one special feature is to be identified, suffixes are provided in the order shown in the table below.
\nDetails of the significance of specific prefixes and suffixes are given in the relevant product sections.
\nDesignation system
\nBearing designations not covered by the basic system
\nInsert bearings
\nThe designations for insert bearings differ somewhat from those described in the basic designation system and are covered in the relevant product section.
\nNeedle roller bearings
\nThe designations for needle roller bearings do not fully follow the basic designation system and are covered in the relevant product section.
\nTapered roller bearings
\nThe designations for metric tapered roller bearings follow either the basic designation system or a designation system, established by ISO in 1977, covered in ISO 3551).<\/p>\n
\nBearings designed to meet a specific customer requirement are typically designated by a drawing number. The drawing number does not provide any information about the bearing.
\nOther rolling bearings
\nRolling bearings not covered in the Ball bearings and Roller bearings sections, such as super-precision bearings, thin section bearings, slewing bearings or linear bearings, follow designation systems that can differ significantly from the basic designation system.<\/p>\n","protected":false},"excerpt":{"rendered":"