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MATERIALS
| There
are essentially two choices for the material used in a ball bearing
- chrome steel or stainless steel. Since the material plays a
major part in the performance of a bearing in any given application,
it is very important that the correct material is used. Note that
the specified material applies to the load bearing components
only - the rings and the balls. The retainer and the shields (if
used) are usually made from a different material and are subject
to separate specification |
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CHROME STEEL (AISI 52100
OR EQUIVALENT) |
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This is the standard material used for
ball bearing applications where load capacity is the main consideration.
The machinability of this steel is excellent, giving smooth,
low noise raceway finishes, together with superior life. Chrome
steel material is recommended in applications where corrosion
is not a factor. CHEMICAL COMPOSITION (%):
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STAINLESS STEEL |
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| 400 series martensitic stainless steel
is the standard material for miniature and instrument ball bearings
where corrosion resistance is more important than load capacity.
There are 3 types of 400 series stainless steel used in the bearings
described in this handbook. These materials have evolved in response
to different manufacturing and application needs. It is important
to note that the actual material used is generally determined
by the manufacturer, and cannot be specified by the user. The
bearing part numbering system gives the
appropriate codes for each material type. |
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| DR Stainless steel
This material is used in the manufacture of most corrosion-resistant bearings. It has been specifically developed to give excellent lifetime and low noise characteristics, combined with superior corrosion-resistance. CHEMICAL COMPOSITION (%):
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