Date: 2013-08-20

Amount of bearing grease filling

In order to improve the processing efficiency and accuracy of the surface, a new type of machine tool machining centers and CNC lathes, wants to increase the spindle speed. Followed, endangering the machining precision spindle temperature rise has become a problem.
And, in particular, commonly used inner diameter less than 150mm spindle bearing grease lubrication.
Greased the way, if you fill in the bearing grease excessive, especially in the initial operation just fill cause abnormal heating, has the potential to grease deterioration. In order to prevent this from happening, you should spend enough time careful running-operation.
NSK Bearings past experiences in order to ensure not affect lubrication performance under the premise of simplifying the run-in operation, the special standard for machine tool spindle bearing grease fill recommendations: cylindrical roller bearings for 10% of the bearing space volume, bearing its 15% of the volume of the space.
Main bearing bearing space volume commonly used bearings approximately 1015% amount of grease standard fill. In actual use, the following simple formulas can be used to calculate the reference value.
V10f10-5 (D2d2) B
, V10: probably fill amount (cm3)
D: Nominal Diameter (mm)
d: nominal diameter (mm)
B: Nominal the bearings width (mm)
f1.5 NN30 series
BA10X
BT10X Series
the f1.7 70,72 series
f1.4 NN49 series
In addition, high speed bearing grease filled ball bearings should be used synthetic oil, mineral oil based oil quality grease roller bearings should be used, so you can guarantee good results.
Bearings for machine tool spindle, vertical pump motor, worm gear reducer and so on.
It mostly greased greased bearing temperature rise and durability will be influenced by the amount of grease filled. Therefore, in order to give full play to the bearing performance to fill grease is the key to the right amount depending on the conditions of use. To this end, we must first understand how to use the volume of the space of the bearing.
Bearings, its bearing series, contact angle or cage type portfolio into many types.

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