Bearing Handing

Bearings are precision part and, in order to preserve their accuracy and reliability, care muse be exercised in their handling. In particular, bearing cleanliness must be maintained, sharp impacts avoided and rust prevented.

 

NZSB brand bearing are coated with a rust preventative before being packed and shipped, and they shall be stored at room temperature with a relative humidity of less than 60%.

 

Bearing should be fitted in a clean, dry work area. Especially for small and miniature bearing, a clean room should be provided as any contamination particles in the bearings will greatly affect bearing efficiency.

Before Installation, all fitting tools, shafts, housings, and related parts should be cleaned and any burrs or cutting chips removed if necessary. Shaft and housing fitting surfaces should also be checked for roughness, dimensional and design accuracy, and to ensure that they are within allowable tolerance limits.

Bearing should not be unwrapped until just prior to installation. Normally, bearings to be used with grease lubricant can be installed as is, without removing the rust preventative. However, for bearings which will use oil lubricant, or in cases where mixing the grease and rust preventative would result in loss of lubrication efficiency, the rust preventative should be removed by washing with benzene or petroleum solvent and dried before installation. Bearings should also be washed and dried before installation. If the package has been damaged or there are other chances that the   bearings have contaminated. Double shielded bearings and sealed bearings should never be washed.

When Bearings are being installed on shaft or shaft or in housing, the bearing ring should never be struck directly with a hammer or drift as showed in the following page.

Bearing are often removed as part of periodic inspection procedures or during the replacement of other parts. However, the shaft and housing are almost always reinstalled, and in more than a few cases the bearings themselves are refused. These bearings, shaft, housings, and other related parts must be designed to prevent damage during disassembly procedures and the proper disassembly tools must be employed. When removing inner and outer rings which have been installed with interference fits, the dismounting force should be applied to that ring only and not applied to other parts of the bearings, as this may cause internal damage to the bearing's raceway or rolling elements.