Bearing bore diameter code: Under normal circumstances bearing bore diameter bearing bore diameter code (basic code of the last two digits) × 5 = internal diameter (mm), Example: bearing6204 of the inner diameter is 04 × 5 = 20mm.
Common special circumstances:
(I) when the bearing bore diameter less than 20mm
The bearing bore size (mm) 10,121,517
Corresponding inner code is 00010203

(Ii) when the bearing inner diameter less than 10mm, the basic code of the last one bearing diameter size; Example: bearing 608Z, the basic code '608 'in the last one for inner dimensions of the bearing 608Z inner diameter is 8mm. And so on 627 internal diameter of 7mm, 634 of the inner diameter of 4mm.
(Iii) bearing inner diameter is not a multiple of 5 or greater than or equal to 500mm, inner code with a slash '/' separated. Another situation: part of the needle bearing the old code inner code directly using the '/' separated. These types of situations, '/' behind several values for the bearing bore size. The table below example:
Bearing 619/1.562/2260/5003519/11207943/25
Inner diameter (mm) 1.522500112025



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