628 zz bearing
Series: 628 zz miniature deep groove ball bearings
Model: 628 zz
Inside diameter: 8
Outer diameter: 24
External dimension (mm) B1:8.0
External dimension (mm) R
Minimum chamfer of R1:0.30
Rated dynamic load (N) of Cr: 3350
Rated static load (N) of Cr: 1430
Rated dynamic load (kg) : 340
Rated static load (kg) of Cr: 146
Limit speed for 628 zz
Open Z·ZZD dust cover: 28000
Limit speed D·DD sealing ring: 24000
Limit speed Open Z dust cover: 34000
A. Minimum: 10
Maximum size of db: 12
Installation size (mm) A Max. : 22
Installation size (mm) : 20.5
A Max. : 0.30
Installation size (mm) B Maximum: 0.30
Shielded dust cap: 17.40
628 zz bearing temperature overheat solution
Because of the different causes of heating of the 628 zz bearing, the solutions are also different. The following is the solution when the temperature of the 628 zz bearing is overheated:
1, the fat filling method, the so-called fat filling method is regularly to the bearing working surface to fill the appropriate amount of grease, is one of the most commonly used grease lubrication.
2. Oil cup method: The oil cup method is to set a cap-type oil cup or pressure oil cup on the bearing seat, and regularly rotate the cap or oil gun to inject grease.This is also a common form of grease lubrication.
3, pressure grease method, pressure grease method is dependent on grease pump grease.At this point should choose a good flow of grease.
4, centralized grease supply method, centralized grease through the grease pump, at the same time to each 628 zz bearing and other parts of the grease.Similarly, the grease should be of good flow resistance, oxidation resistance and corrosion resistance, which is also a pressure grease.
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