Bearing type meaning

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Bearing type meaning

Source: Bearing network time: 2017-12-08

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Inner diameter code: Under normal conditions, the inner diameter of the bearing inner diameter code (the last two digits of the root code) × 5 = inner diameter (mm); for example: the inner diameter of the bearing 6204 is 04 × 5 = 20mm.
Common special conditions:
(1) When the bearing inner diameter is less than 20mm
The inner diameter of the bearing is (mm) 10 12 15 17
Corresponding internal diameter code is 00 01 02 03
(2) When the inner diameter of the bearing is less than 10mm; the final one of the fundamental code is used to indicate the inner diameter of the bearing, for example: bearing 608Z; the final one of the basic code '608' is used as the inner diameter scale; the inner diameter of the bearing 608Z is 8mm. and so on. The inner diameter of 627 is 7mm; the inner diameter of 634 is 4mm.
(3) The inner diameter of the bearing is not a multiple of 5 or more than 500mm; the inner diameter code is separated by a slash '/'. Another condition: some needle needle bearing old code inner diameter code is directly separated by '/'. These conditions The number of digits after the '/' is the bearing inner diameter scale. See below for an example:
Bearing type 619/1. 5 62/22 60/500 3519/1120 7943/25
Inner diameter scale (mm) 1. 5 22 500 1120 25
The above are common indication methods for several bearing inner diameters; some companies in the world have different code names, which are subject to actual conditions. Please refer to various materials and sample manufacturers.
Scale series code: used to express bearings with the same inner diameter but different outer diameter and width; see figure.
Diameter code
↑
Width code outer diameter series code: extra light (0,1), light (2), medium (3), heavy (4)
Width series code: generally normal width is "0", generally not marked. But for tapered roller bearings (type 7) and spherical roller bearings (class 3) and other types can not save "0"
6010 is a light floating series; used for light load and high speed, 6210 is light series; light load speed is the most reasonable; it is the most widely used type, 6310 is medium and heavy series, 6410 is heavy series; used for heavy load low speed. medium type It is the most widely used with medium and heavy duty; such as various types of mechanical transmission parts, small and medium-sized motors, assembly line conveyors, motorcycles, etc., these two types are used.
Type code: should remember the commonly used bearing code: 3,5,6,7,N five categories; corresponding to the old code is 7;8;0;6;2 class.
The official grade code is shown in the table:
The radial bearing and the angular touch ball bearing are divided into five levels (high to low).
New grade code P2 P4 P5 P6 P0
Old grade code BCDEG
Tapered roller bearings are shown in the following four levels (high → low)
New grade code P4 P5 P6x P0
Old grade code CD Ex G(E)
The thrust ball bearing is divided into four levels as shown in the following table (high → low)
Example code method: Example 16308 6--deep groove ball bearing; 3--series series; 08--inner diameter d=40mm; public service class "O" class, clearance group is "0" group not marked, example 2N105 /P5 N--Cylindrical roller bearing; 1--light series; 05--inner diameter d=20mm; public service grade is 5; clearance group is “0” group not marked,
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