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Many people overlook one thing, Matra is bearing a part, but he's made up of lots of small parts. What role do these small parts have?
For radial spherical plain bearings, the inner ring is usually the shaft tight fit, and working with axis, outer ring and housing usually transition fit or mechanical shell holes, played a supporting role. However, in some instances, also running in the outer ring, inner ring fixed plays a supporting role or simultaneous operation of both inner and outer rings.
For thrust bearings, and tight fit together campaign that axes, and housing or mechanical shell hole transition fit played a supporting role in that seat.
Rolling element (steel ball, roller or needle roller) in the bearing with cage usually evenly arranged in two rings rolling motion between, its shape, size and quantity directly affect the load carrying capacity and performance. Cage other than can be separated from the rolling elements evenly, also can play rolling elements rotate and improve bearing an internal lubrication properties and so on.
Bearing different parts have different features, features can vary immensely, but without the other. So we must be careful during the checking process carefully.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7011A5TYNSULP4 NSK | 55 | 90 | 18 |
| 7221ATYNSULP4 NSK | 105 | 190 | 36 |