What’s the meaning of bearing type number?

It’s too hard to recognize bearings, cause there are so many sizes, so we need the type number to easily distinguish their difference, but there are different rules between brands, the only way to confirm is search in the catalog.

That’s why we need basic number, with basic number, we can know the size of inner ring and other information, for example, 6000ZZ, the first number “6”, means this bearing is deep groove ball bearing, second number”0” means scale order, we’ll omit width order when it’s 0, so this “0” means the outer diameter order is 0, third and forth number always judge together, “00” means bearing inner size is 10mm, “01” means 12mm, “02” means 15mm, “03” means 17mm, “04” or bigger number just multiply the number with 5mm, ex: “04” means 20mm.“ZZ” is suffixed , means steel cap, other suffix such as LLB or LLB means plastic cap.

Besides, there are usually brand and origin been carve on the bearing surface.