Fig.9-1 Grease feeding interval
	[A] : radial ball bearings [B] : cylindrical roller bearings, needle roller bearings [C] : tapered roller bearings, spherical roller bearings, thrust ball bearings
Temperature correction When the bearing operating temperature exceeds 70, obtained by multiplying tf by correction factor a, found on the scale below, should be applied as the feeding interval.   tf'=tfa
Temperature correction factor a Bearing operating temperature
Example of calculating grease feeding interval: In case of a tapered roller bearings with a bore diameter of 100 mm and running speed of 300 min-1, grease has a service life of approximately 8,500 hours, as indicated in Fig. 9-1. If the amount of grease initially enclosed is 0.4 kg, it decreases 0.00113 kg a day (0.4 kg 24 h / 8,500 h = 0.00113 kg/day). If grease is fed once a week, the total grease to be added is 0.008 kg (0.00113 7 days = 0.008 kg).