6306 Bearings Specifications:

6306 bearings technical reference:

Internal Clearances Radial Ball Bearings
In the manufacture of ball bearings,it is standard practice to assemble rings and balls with a specified internal clearance. This characteristic is necessary to absorb the effect of press fitting the bearing rings at mounting.Internal clearances sometimes are utilized to compensate for thermal expansion of bearings, shafts and housings orto provide a contact angle in the bearing after mounting.Internal clearance can be measured either by gauging radially or axially.
Radial measurement is accepted as the more significant characteristic because it is more directly related to shaft and housing fits.

Radial lnternal Clearance
The radial internal clearance of a radial contact ball bearing can be defined as the average outer ring raceway diameter minus the average inner ring raceway dianer minus twice the ball diameter Radial internal clearance can be measured mechanically by moving the outer ring horizontally as pictured in Figure 1. The total movement of the outer ring when the balls are properly seated in the raceways determines the radial internal clearance.Several readings should be taken using different circumferential orientations of the rings in order to get a comprehensive average reading.

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