A bearing reference is not just a number. It contains a lot of information about the bearing. In this blog (reading time: 3 minutes) we will show you three important product characteristics in bearing references. You will be a bearing expert in no time!
First, something about the complete bearing reference. It usually consists of numbers, sometimes combined with letters. The so-called prefixes and suffixes indicate additional properties of the bearing. Often manufacturers use different prefixes or suffixes for similar features. Without an explanatory list, they are confusing. You will find some examples of different prefixes and suffixes.
Fortunately, there is a clear logic behind the basic designation: the part of the bearing number without the prefixes and suffixes. These references are determined according to rules that most manufacturers follow. When you know the “formula”, you can easily discern some important details. Let’s see how that works.
The basic indications consist of three fixed components. A first part is a number, a letter, or a combination of these. This is the description of the bearing type.
The following overview shows the most common bearing types:
0 Angular contact ball bearing double row
1 Self-aligning ball bearing double row
2 Spherical roller bearing, spherical roller thrust bearing
3 Tapered roller bearing single row
4 Deep groove ball bearing double row
5 Thrust ball bearing single or double direction
6 Deep groove ball bearing single row
7 Angular contact ball bearing single row
8 Cylindrical roller thrust bearing
C CARB roller bearing
N Cylindrical roller bearing single row
QJ Four-point contact ball bearing
The 6203-C3 bearing begins with “6” and is, therefore, a single-row groove ball bearing. And the 7416-B-MP is a single-row angular contact ball bearing because it begins with “7”. The first number gives a quick indication of the bearing type.
Now we come to the second part of the basic designation. This is the “size series”. The first number of this section, which is sometimes omitted, indicates the width (for radial bearings) or height (for axial bearings)*. The second number of the size series refers to the outside diameter.
*Radial bearings capture forces perpendicular to the shaft, while axial bearings capture forces in the longitudinal direction of the shaft.
The higher the value, the wider the inner and outer rings. Often the ball size will also increase. Bearings with higher values can be subjected to heavier loads.
In our first example of 6203-C3, the size series is “2”. The table shows this is an average width class. And in our second example of 7416-B-MP, the size series is “4”. Which means it can withstand a (relatively) heavier load.
Finally, the third part of the basic designation. This refers to the inside diameter, also called the bore. These are the last 2 digits in the basic designation. A simple formula will calculate the inside diameter.
Is the number 04 or greater? Then multiply this number by five to get the inside diameter (in mm). Very simple. But there is (of course) an exception. If the number is less than 04, the inner diameter is as shown below:
Code Inside diameter
00 10 mm
01 12 mm
02 15 mm
03 17 mm
Back to our examples. For 6203-C3, “03” indicates the inside diameter. The table above shows it is 17 mm. For 7416-B-MP, “16” indicates the inside diameter. A quick calculation (16 x 5) shows the inside diameter of this bearing to be 80 mm. It’s as simple as that.
We are a high-end auto bearing manufacturer. As a high-end brand in the automobile bearing manufacturing industry, Qianyu Auto Parts has more than 20 years of experience in automobile bearing design and manufacturing, which can meet the most stringent requirements of customers. Products through ISO/TS16949, ISO9001, THE EU CE certification, and other certificates, won domestic and worldwide customer recognition. If you are interested in our products, please contact us now!
66 Panzhuang Bearing Industrial Park, Linqing City, Shandong Province, China.
+86 635 277 7999
Keywords:Spherical Roller Bearings, Tapered Roller Bearing, Cylindrical Roller Bearings, Truck Hub Bearing
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