What are the advantages and disadvantages of zz ball bearings?

The sealing purpose of zz ball bearings is to prevent the leakage of lubricant in the bearing parts, and to prevent the intrusion of external dust, moisture, foreign objects and other harmful objects into the bearing, so that the bearing can operate safely and lastingly under the required conditions.
The general term for the device made for this purpose is the bearing sealing device. The sealing device has a great task to maintain the running performance and durability of zz ball bearings.
Grease-lubricated seal installation is easier, and oil-lubricated seal installation is more difficult. The sealing device can also be used in the form of sealed bearings.

1. ZZ-dust cover seal zz ball bearings

ZZ is the code used for sealed bearings, which belongs to the post code in the bearing code.

The seal of the bearing indicated by ZZ is a double-sided seal with a dust cover. The material of the seal cover is a steel plate. The dust cover is stamped with an abrasive tool and pressed into the bearing with the abrasive tool. Bearings sealed with dust caps are non-contact seals and are mainly used for dust and seals of bearings.

It is worth noting that the zz ball bearings rotating space has been filled with a suitable label and a suitable amount of lubricant when shipped from the factory. The label and the filling amount of the grease are the bearing manufacturers, which have been obtained after thousands and tens of thousands of tests. The most reasonable ratio scheme can be used in one value to the end of the life of zz ball bearings. There is no need to add anything in the middle.

zz ball bearings use environment: motors, etc.
The advantages of zz ball bearings: low cost and low starting torque, which can achieve high temperature and low temperature working conditions.

Disadvantages of zz ball bearings: the sealing gap is large (generally 0.4mm or more), and the dustproofness is low.

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