The basic code of the bearing is composed of the bearing type code, the size series code and the inner diameter code. Basic code, type code, size series code, inner diameter code, for example: 6201, 6 stands for type code; 2: size series code; 01: inner diameter code 1, bearing type code, bearing type code is represented by numbers or letters, see the table below: code bearing type 0 Double row angular contact ball bearing 1 self-aligning ball bearing 2 self-aligning roller bearing and thrust self-aligning roller bearing 3 tapered roller bearing 4 double row deep groove ball bearing 5 thrust ball bearing 6 deep groove ball bearing 7 angular contact ball bearing 8 Thrust cylindrical roller bearings N cylindrical roller bearings double row or multi-row bearings are represented by letters NN U outer spherical ball bearings QJ four-point contact ball bearings 2, size series code The size series code of the bearing is determined by the width (height) degree series of the bearing Combination of code and diameter series code. Diameter series refers to the series of outer diameter dimensions corresponding to the inner diameter of the same bearing. There are 7, 8, 9, 0, 1, 2, 3, 4, 5 and other diameter series in which the outer diameters increase in sequence. The width series refers to the width dimension series corresponding to the same bearing diameter series. There are 8, 0, 1, 2, 3, 4, 5, 6 and other width series with successively increasing width sizes. The height series of thrust bearings corresponds to the width series of radial bearings, and there are four series of heights such as 7, 9, 1, 2 and so on. 3. Refer to the table below for the inner diameter code: an example of the inner diameter code of the bearing inner diameter 0.6 to 10mm (non-integer) is directly expressed by the nominal inner diameter in millimeters, and the deep groove ball bearing 618/2.5 is separated by '/' between the base and the size series code The nominal inner diameter in millimeters is directly expressed, 1 to 9mm (integer) For deep groove ball bearings and angular contact ball bearings 7, 8, 9 diameter series, deep groove ball bearings 625 or 618/5 inner diameter size series codes use '/' Separate inner diameter is 5mm0001 deep groove ball bearing 620002 inner diameter is 10mm0320 to 480mm (except 22, 28, 32) the quotient of the nominal inner diameter divided by 5, the quotient is a single digit, you need to add '0' to the left of the quotient, such as 08 This is the more common expression method:) Spherical roller bearing 23208 inner diameter is 40mm Spherical roller bearing 230/50 is greater than or equal to 500mm, and 22, 28, 32mm but use '/' between the size series Separate but use '/' to separate between the dimension series. 0 deep groove ball bearing with an inner diameter of 500mm, 62/22 bearing with an inner diameter of 22mm, bearing supplementary code prefix meaning, the prefix of the bearing model is mainly used to indicate the parts of the bearing, in order to avoid the difference with other models Confusing, it is common to place it before the entire bearing model number. GS: Seat ring of cylindrical roller thrust bearing K: Cylindrical roller-cage thrust assembly K-: Inner ring with roller-cage assembly (CONE) or outer ring of the ABMA standard series of inch tapered roller bearings Ring (CUP) L: Inner or outer ring of separable bearing R: Inner or outer ring of separable bearing with roller-cage assembly W: Stainless steel deep groove ball bearing WS: Cylindrical roller thrust Shaft ring of bearing · ZE: Bearing used for electronically controlled installation method Note: Tapered roller bearings, especially inch bearings, are generally called CONE for the inner ring with roller-cage assembly, and CUP for the outer ring. Bearing supplementary code suffix meaning (suffix code) The suffix of the bearing model is used to indicate a variant with a different structure and/or other characteristics from the basic design. When more than one bearing characteristic is required, the suffixes are regularly divided into several groups. The more commonly used suffixes are listed below, but it should be noted that not all variants can be listed here (for specific types of suffixes, please refer to other corresponding information). · A: Improved or slightly changed interior design. The external dimensions are the same. Usually have different meanings for different types or series of bearings. For example: 4210 A: means double row deep groove ball bearing without ball filling gap; 3220 A means double row angular contact ball bearing with contact angle of 30°. · AC: Single row angular contact ball bearing with a contact angle of 25° · ADA: The snap groove on the outer ring has been improved, and the split inner ring is fixed by a retaining ring. B: Improved or slightly changed internal design, with the same external dimensions, usually have different meanings for different types or series of bearings. For example: 7224 B means a single row angular contact ball bearing with a contact angle of 40°; 32210 B means a tapered roller bearing with a larger contact angle Bxx(x): B and a two-digit or three-digit combination, use to denote some variants without a suitable suffix. Example: B20: Narrowed width tolerance · C: Improved or slightly changed interior design. The external dimensions are the same. Usually have different meanings for different types or series of bearings. For example: 21306 C means spherical roller bearing with two window-type stamped steel cages, inner ring without ribs and a guide ring guided by the inner ring CA: 1, C-type spherical roller bearing with fork type Machined brass cage, ribs on both sides of the inner ring and a guide ring guided by the inner ring; 2, universally matched bearings, when arranged back-to-back or face-to-face, the axial clearance is smaller than that of the common group (CB) · CAC: CA type spherical roller bearings, the guidance of the rollers has been improved · CB: 1, universally matched bearings, in back-to-back or face-to-face configurations, the axial clearance is the normal group; 2, double row angular contact ball bearings , a specific axial clearance. ·
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Many of the CONTACT US listed here can be purchased for less money, but in general we recommend paying a slightly higher price for significantly improved performance. These are our top choices and their recommended configurations.
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