6203 bearing is one of the most common ball bearings that have 17mm inner diameter and 40mm outer diameter, before the seals were inserted, grease was added to give longer life to the bearing assembly, 6203 ball bearing is also an economical item, notice the price in relation to the dimensions, however, metric bearings are generally less in price than the imperial inch standard, the reason is simple, the higher the demand, the higher the mass production and lower the cost.

Deep groove ball bearings can be used in gearboxes, instruments, motors, household appliances, internal combustion engines, transportation vehicles, agricultural machinery, construction machinery, construction machinery, roller skates, yo-yos, etc.