... 0.008mmCHARACTERISTIC:1.No or less lubrication is used for handing or cannot add oil ,it neet not maintain ... protection forgrinding bearing no grip appearance.7.Less requirement for grinding bearing, all the bearings that not hardening and ... present, have applied widely all sorts of mechanical arthrodia, for example, printing press, spinning machine, tobacco machine, micro-machine, automobile, ...