What is the designation indication of a slewing table bearing?

The code notation of the slewing plate bearing is provided by the Dandong phase three slewing bearing manufacturing **** collection.

1. The composition of the code.

The bearing code consists of the base code and the post-code.

Second, the composition of the fundamental code.

The fundamental code is divided into three parts, the front part is the structural type and the transmission type code, the middle part is the diameter of the rolling element (the bearing of more than two rows of rolling elements is the maximum diameter of the rolling element), and the rear part is the diameter of the rolling center of gravity (the bearing of more than two rows of rolling elements is the maximum diameter of the rolling center of gravity).

1. The code of the structural type shall be according to the rules in Table 1. 01 Four-point contact ball bearings 02 Double row reducing ball bearings 11 Interspersed cylindrical roller bearings 13 Three-row cylindrical roller mating bearings.

2. The transmission type code shall be according to the rules in Table 2. 0 Toothless 1 Involute cylindrical gear external gear smaller module 2 Involute cylindrical gear external tooth larger module 3 Involute cylindrical gear internal tooth smaller module 4 Involute cylindrical gear internal tooth larger modulus.

Rules for the compilation of the fundamental code When the fundamental code is arranged, the code of the structural type and the code of the transmission type are written consecutively, and the front, middle and rear parts are used with "."Spaced.

1. The composition of the code.

The bearing code consists of the base code and the post-code.

2. The composition of the fundamental code.

The fundamental code is divided into three parts, the front part is the structural type and the transmission type code, the middle part is the diameter of the rolling element (the bearing of more than two rows of rolling elements is the maximum diameter of the rolling element), and the rear part is the diameter of the rolling center of gravity (the bearing of more than two rows of rolling elements is the maximum diameter of the rolling center of gravity).

1. The code of the structural type shall be according to the rules in Table 1.

01 Four-point contact ball bearing; 02 double-row reducing ball bearings; 11. interspersed with cylindrical roller bearings; 13 rows of cylindrical rollers with matching bearings.

2. The transmission type code shall be according to the rules in Table 2.

0 toothless; 1. The external gear of the involute cylindrical gear has a smaller modulus; 2. The external gear of the involute cylindrical gear has a large modulus; 3. The involute cylindrical gear has a smaller internal tooth modulus; 4. The involute cylindrical gear has a large internal gear.

3. Rules for the compilation of fundamental codes.

When the fundamental code is arranged, the construction type code and the transmission type code are written consecutively, and the front, middle and rear parts are used with ".""Spaced.

It's not good to say, if you want to give **, you'll know.

Rolling bearing type code refers to the inner diameter, diameter series, width series and type of the bearing is generally up to five digits, and the code is divided into basic code, post-code and pre-code. According to the rolling bearing model code, professional and technical personnel can obtain some basic information of the rolling bearing, such as: load capacity, direction and nature; the maximum permissible speed reached; The rigidity of the bearing, the key factors such as the self-alignment performance and the installation error facilitate the subsequent selection of the bearing.

Examples of commonly used codes for rolling bearings:

1.The internal structure code is to indicate the different internal structures of the same type of bearing, which are indicated by letters immediately followed by the basic code. For example, angular contact ball bearings with contact angles of ° and 40° are represented by C, AC and B respectively.

2.The tolerance grades of bearings are divided into 2 grades, 4 grades, 5 grades, 6 grades, 6x grades and 0 grades, a total of 6 grades, in order from high to low, and their codes are P2, P4, P5, P6, P6x and P0. In the tolerance class, class 6x is only applicable to tapered roller bearings; Class 0 is an ordinary grade and is not marked in the bearing code.

3.The commonly used bearing radial clearance series is divided into 1 group, 2 groups, 0 groups, 3 groups, 4 groups and 5 groups, a total of 6 groups, and the radial clearance is from small to large. Group o clearance is a commonly used clearance group, which is not marked in the bearing code, and the rest of the clearance groups are represented by C1, C2, C3, C4 and C5 in the bearing code.

1. For bearings with an inner diameter of 10mm, the inner diameter of the bearing is the inner diameter code of the bearing.

For example, the inner diameter of the 608T1XZZMC3er bearing = 8mm.

2. Bearings with inner diameter sizes greater than or equal to 10mm and less than or equal to 17mm

Inner diameter size = 10mm, the inner diameter code of the bearing is: 00 example: 6200cm bearing inner diameter size = 10mm

Inner diameter size = 12mm, the inner diameter code of the bearing is: 01 example: 6901-2Z bearing inner diameter size = 12mm.

Inner diameter size = 15mm, the inner diameter code of the bearing is: 02 example: 6902-2Z bearing inner diameter size = 15mm.

Inner diameter size = 17mm, the inner diameter code of the bearing is: 03 example: 6903-2Z bearing inner diameter size = 17mm.

3. Bearings with inner diameter size greater than or equal to 20mm and less than or equal to 180mm.

For different types of bearings, the code code rules are defined by different brands and manufacturers.

Five-digit models, generally the inner diameter is less than 500mm, the first three numbers represent the structure series, and the last two numbers represent the inner diameter size.

For example, deep groove ball bearing 61840, 618 is a series, inner diameter 200 = 40 * 5

For example, single row cylindrical roller bearings 31252 (NU1052), 312 (NU10) series, inner diameter 260 = 52 * 5

For example, the spherical roller source fuel bearing 22324,,,223 is a double-row spherical roller 223 series, with an inner diameter of 120=24*5

For example, angular contact ball bearing 71964, 719 is a series, inner diameter 320 = 64 * 5

For example, the conical roller shaft core spine 32060 ,,, cracked seepage 320 is a single row 320 series, with an inner diameter of 300=60*5

Thrust ball bearing 51184,,511 series, inner diameter 420=84*5

For example, spherical thrust roller bearing 29420, 294 is spherical thrust 294 series, inner diameter 100 = 20 * 5

Different series have different prefixes and suffixes, targeted specificity, 22326CA C3W33 and so on, different applications have targeted coding, if you don't know, you can consult the supplier or manufacturer.

3 represents tapered roller bearings, 0 is the width series, 0 is the diameter series, 2 is the diameter series, and 06 means the inner diameter of the bearing is 30mm

6 represents a single row deep groove ball bearing, 2 represents a diameter series 2, 03 represents the bearing inner diameter size, and 6203 has an inner diameter of 17mm

If it is the old domestic name, it is 30206

If it is a new designation, 7 represents a single row angular contact ball bearing, 2 indicates a diameter series 2, and 06 indicates a bearing inner diameter of 30mm

The old domestic name (the complete name is 1180902), the new domestic name is the double plastic cover seal, and 9 is the diameter series 9, which is a light and thin series. 02 indicates the inner diameter of the bearing, and the inner diameter of the 180902 is 15mm

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