How do you decode a bearing number?
The first digit indicates the width or height series (dimensions B, T or H). The second digit identifies the diameter series (dimension D). The last two digits of the basic designation identify the size code of the bearing bore. The size code multiplied by 5 gives the bore diameter (d) in mm.
How do you identify different bearings?
Measuring your bearing: Most bearings are measured in three ways, the inside diameter or (ID), the outside diameter or (OD) and the width or (W). It is important to note that our bearing measurements are all done in the following order: Inside diameter (ID) x Outside diameter (OD) x Width (W).
How do you determine bearing size from bearing number?
Note : In case there is no fourth digit, then the 3rd digit indicates the bore size in mm. For example: in case of bearing 636, the bore size of the bearing will be 6mm. Thus, we can identify now that in case of bearing 6305ZZ, the third and fourth digit ’05’ means the bearing’s bore size is 25 mm.
What does V stand for in bearings?
“V-shaped” marking A “V-shaped” marking on the outside surface of the outer rings of matched bearing sets indicates how the bearings should be mounted to obtain the proper preload in the set. The marking also indicates how the bearing set should be mounted in relation to the axial load.
What do the letters after a bearing number mean?
The letters after the bearing number indicates the presence / absence / type of shielding or sealing and any other specialties in the bearing.
What does bearing number indicate?
A bearing number is composed of a basic number and a supplementary code, denoting bearing specifications including bearing type, boundary dimensions, running accuracy, and internal clearance.
What does RZ mean on a bearing?
RZ: The bearing side has a low friction seal lined with steel plate synthetic rubber (non-contact type); RS: The bearing side has a contact seal lined with synthetic rubber or polyurethane (contact type). The contact and non-contact means that the seal ring of the bearing contacts with the inner ring of the bearing.
What does B mean on a bearing?
1.2 Code for the bearing bore The code for the bearing bore indicates the bearing’s bore size. For example, the code 6224 stands for a deep-groove ball bearing with a bore size of 120 mm.
What are the two types of seals used on bearings?
The types of seals most commonly used with rolling (ball and roller) bearings are contact or lip seals; non-contact seals; and, to a lesser degree, various types of bearing isolators that combine the functions of contact and non-contact seals in different ways.
When did the ABMA come up with the bearing number?
Developed in 1917 as an industry trade group by a committee of the world’s leading bearing manufacturers, the American Bearing Manufacturers Association (ABMA) developed a standard numbering code as a universal identifier of bearing size and attributes.
Which is the next symbol in the AFBMA code?
The next symbol in the AFBMA bearing identification code is X, P, S or G, indicating the manufacturer’s standard bearing cage, metal shield and contact seal fastening and snap ring groove on outside diameter. Machining tolerances, metal alloy and diameter are not identified by the AFBMA code.
Do you need to convert AFBMA bearings to SKF?
At one time that had an on-line afbma converter page. As you probably know, those tail-digits are not relevant if your objective is vib monitoring. But may be important when ordering replacement bearings. You can always ask your bearing distributor to convert it also. I looked in that publication and missed it.
How can I find out what type of bearing I have?
The Anti Friction Bearing Manufacturers Association have a code system which identifies bearings by type, size and construction. Any bearing supply house or bearing manufacturer can identify their bearings from such code numbers. The following tabulation shows those codes which most commonly apply to bearings in U.S. MOTORS® products.