Miniature bearings are the bearings that OD is less than 9mm in metric and less than 9.525mm in inch.
Miniature bearings can be produced by several different materials, including carbon steel, chrome steel, stainless steel, plastic, ceramic etc.
The item Nos of miniature bearings have 68 series, 69 series, 60 series in metric and R series in inch. The types have open, shielded(Z, ZZ), sealed(RS, 2RS), open type with flange(FL), shielded with flanged outer ring(FL…Z, FL…2Z).
The frequently-used item Nos have 682, 682ZZ, MR52, MR52ZZ, 692, 692ZZ, 683, 683ZZ, MR83, MR83ZZ, 693, 693ZZ, 603, 603ZZ, 623, 623ZZ, MR74, MR74ZZ, MR84, MR84ZZ, 684, 684ZZ, MR104, MR104ZZ, 694, 694ZZ, 604, 604ZZ, 624, 624ZZ, MR85, MR85ZZ, MR95, MR95ZZ, MR105, MR105ZZ, 685, 685ZZ, MR115ZZ, 695ZZ, 605ZZ, 625ZZ, MR106, MR106ZZ, MR126, MR126ZZ, 686, 686ZZ, 696ZZ, 606ZZ, 626ZZ, MR117, MR117ZZ, MR137, MR137ZZ, 687, 687ZZ, 607ZZ, 627ZZ, MR128, MR128ZZ, MR148, MR148ZZ, 688, 688ZZ, 698ZZ, 608ZZ, MR149, MR149ZZ, 689, 689ZZ, 609ZZ, 629ZZ, 639ZZ.
We are chrome steel miniature ball bearings and stainless steel miniature ball bearings(extra small ball bearings) manufacturer in China.