Answer / amit

by de grouping the bearing no we can easily find the
dimension on bearing
like
bearing no 3310
it indicates

3-heavy duty

3- double ball bearing

10- multiply the last digit of bearing no by 5 u can get
shaft Outer Dia.

10- 10*5=50mm shaft dia.
Note:- here directly 10 is taken because at the time when 0
comes as a last digit we have to take total no next to 0

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