... are acceptedAdvantage:Most representative bearing of the rolling bearingsSuitable for high speed even extremely high speedDurable, less maintenance ... P4.p2cageStamped steel cage or solid brass cage Shield/closureOpen ball bearing, Z, ZZ, RS, 2RS, 2RZTolerance CodeABEC-1 ... axial loadingFeature*low noise,high precision,long usage life *less coefficient frication*high processing speed*various size ...