According to related standard, the vibration noise (dB) of U&J bearings for their vibration under acceleration are divided into four groups:Z1,Z2,Z3, and Z4. Also they can be divided into four groups in according to vibration speed (um/s):V1,V2,V3, and V4. Now U&J bearing can meet to under acceleration group Z1,Z2,Z3,Z4; and vibration speed group V1,V2,V3. Single bearing vibration noise under acceleration specification is shown on table No.10.
Single bearing vibration speed specification is shown on table No.11
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