SKF bearing naming and basic code
Core Tips: 1. Naming of SKF Bearings A complete bearing code consists of a basic code plus one or more supplemental codes. Basic code: used to indicate the type of bearing, bearing
First, the name of SKF bearings
A complete bearing code consists of a basic code plus one or more supplemental codes. Basic code: used to indicate the type of bearing, the basic design of the bearing, the dimensions of the bearing. Supplementary code: A component of a bearing, a variant that has a different structure from the basic design or has other characteristics.
Second, the basic code of SKF bearings
All SKF standard bearings have specific basic models, usually with three, four or five digits, or letters and numbers. The first number or the first letter or combination of letters indicates the bearing type; the last 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 Diameter series (size D). The last two digits of the base model are the bearing size code; multiply by 5 to get the inner diameter in millimeters. However, there are some exceptions as follows:
1. In some cases, the number indicating the bearing type and the first number indicating the size series are omitted. Example: 6(0)208-2Z (0)3209 A .
2. For bearings with an inner diameter of 10 mm or less or 500 mm or more, the inner diameter is usually expressed in millimeters directly, without the code. Dimensions are separated from the rest of the bearing model by diagonal lines, for example: 618/8 (d = 8 mm) or 618/530 MA (d = 530 mm).
3. Bearings with inner diameters of 10, 12, 15 and 17 mm have the following size designations: 00 = 10 mm; 01 = 12 mm; 02 = 15 mm; 03 = 17 mm.
4. For some smaller bearings with an inner diameter of less than 10 mm, such as deep groove, self-aligning and angular contact ball bearings, the inner diameter is also expressed in millimeters (without the code), but it is not separated from the series by a diagonal line, for example 629 or 129 (d = 9 mm).
5. The inner diameter of the bearing that deviates from the standard inner diameter is always not coded, but is expressed in millimeters of up to three decimal places. The inner diameter mark is part of the basic model and is separated from the basic model by a diagonal line, for example 6202/15,875 (d = 15,875 mm).
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