Answer Posted / ramesh yerabolu

Normally bearing number is having 4 digits.

EX 1 : Bearing # is 6308

I st digit 6 is indicates type of bearing. 6 means single
row deep ball bearing.3 indicates applied loads depends
upon the application.The last two digits indicates diameter
of the shaft.As per above example 08 means shaft dia is 40
mm.The simple calculation is shaft dia divided by5 is last
two digits of bearing number.
EX 2: Bearing # is 6207, The shaft dia is 35 mm.

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