What Does The Bearing Model Mean?

First, bearing model - basic model

- The first number or the first letter or letter combination represents the bearing type.

- The next two digits determine the ISO size series, the first digit represents the width or height series (size B, T, or H, respectively) and the second digit represents the diameter series (size D).

- The last two digits of the basic model are the dimension code of the bearing; But there are exceptions to any rule. The most important exceptions in the bearing model system are listed below.

1. In some cases, the number representing the bearing type and/or the first number representing the dimension series are omitted. These figures are placed in parentheses in the table.

2. For bearings with an inner diameter of less than or equal to 10 mm or greater than 500 mm, the inner diameter is usually expressed in millimeters, without a code name. Dimensions are separated from the rest of the bearing model with slashes, e.g. 618/8 (d - 8 mm) or 511/530 (d - 530 mm). According to ISO15:1998

The method is also applicable to standard bearings with diameters of 22, 28 or 32 mm, e.g. 62/22 (d - 22 mm).

3. Bearings with internal diameters of 10, 12, 15 and 17 mm have the following dimension code signs: 00 s 10 mm 01 s 12 mm 02 s 15 mm 03 s 17 mm

4. For smaller bearings with an internal diameter of less than 10 mm, such as deep ditches, self-adjusting and angular contact ball bearings, the inner diameter is also expressed in millimeters (without code names), but it does not use slashes between them, e.g. 629 or 129 (d s 9 mm).

5. Bearing internal diameters that deviate from the standard inner diameter are always not coded, but are expressed in up to three decimal millimeters. The internal diameter mark is part of the base model and is separated by slash esquel seine from the base model, e.g. 6202/15875 (d s 15875 mm s 5/8 inches).

Second, series models

Each standard bearing belongs to a specific bearing family and is determined by a basic model with no size meaning. Series models often include a suffix A, B, C, D or E or a combination of these letters, such as CA. These letters are used to determine differences in internal design, such as contact angles.

The most commonly used series models are shown in the table, on top of the bearing diagram. The numbers in parentheses are not included in the series. SKF bearing precode (prefix) and what it means

GS - thrust cylindrical roller, thrust roller bearing ring. Example: GS81107-thrust cylinder roller bearing 81107 seat ring. K - in a combination of thrust rollers and cages. Example: K81170.

K-—— conforms to the AFBMA standard series of imperial cone roller bearings with rollers and cage assemblies with inner rings (inner cones) or outer rings (cone rings). Example: K-09067 - the inner cone of the cone roller bearing of 09000.

L - A single inner or outer ring of a separated bearing. Example: LNU207 - the inner ring of the cylindrical roller bearing NU207. SKF bearing rear code (suffix) and what it means

Single-row angle contact ball bearing ACD - contact angle is 25 degrees. B - The contact angle is 40 degrees. CC - The contact angle is 12 degrees.

Mindroller bearings

CAC, ECAC, CA, ECA - these are designed for large-size bearings, and the rollers are symmetrical. There is a fixed stop edge on both sides of the inner ring, and the inner ring guide of the active ring is guided. The cage is a whole brass or steel solid frame. CAC and ECAC bearing rollers and roller surfaces are optimized for roller guidance and reduced friction. The ECAC type has a reinforced roller to increase load capacity.

-2F - The outer sphere bearing has dust ring on both sides. -2FF - The outer spherical ball bearing stakes a combination of dust bezels.

G - Universal pairing of single-row angle contact ball bearings. When arranged face-to-face or back-to-back, there is a certain pre-installation preload in the bearing.

GA - Face-to-face, with lighter preloads in the bearings when arranged back-to-back. GB - face-to-face, back-to-back arrangement, bearing a medium preload. GC - Face-to-face, back-to-back arrangement, bearing a heavier preload.

K - Cone hole, cone 1:12. K30 - Conical hole, cone 1:30. The FAG bearing precode (prefix) and its meaning R are placed directly before the bearing base code, and the remaining front code is separated from the base code by small dots. GS-thrust cylindrical roller housing ring. Example: GS.81112 K-Roll ... K - Cone hole, cone 1:12. K30 - Conical hole, cone 1:30. FAG bearing precode (prefix) and its meaning

R is placed directly before the bearing base code, the remaining front code is separated from the base code by small dots