Bearings are precision parts and in order to preserve their accuracy and reliability, special care must be taken before their installation:

① Do not unwrap the packing before using, and do not lay it aside after unwrapping.
② Keep the working area clean.
③ Use proper fitting tools, and keep them clean.
④ Do not use cloth which may produce scraps, and do not use dirty cloth.
⑤ Clean the components all around before installing.
⑥ Do not touch the bearing with bare hand directly.

Note: Bearings should also be washed with benzene or petroleum solvent and dried before installation if the package has been damaged or there are other chances that the bearings have been contaminated. Double shielded bearings and sealed bearings should never be washed.