needle bearing greaser needs to be added at all times to replace deteriorated, exuded and contaminated grease. Because rolling bearings operate under a wide range of conditions, field expertise is required to determine the appropriate grease addition interval from once a day to once a year. No single grease or grease addition schedule can take care of all the load, speed and operating temperature conditions under which a bearing will exhibit superior performance.
There are many factors that affect the frequency of grease additions. Generally speaking, the smaller the bearing and the faster the speed, the less frequently grease should be added. The larger the size and slower the speed of the bearing, the more frequently grease needs to be added.
needle roller bearing temperature increases the oxidation rate of grease, super 150 ° F (65 ° C) every 18 ° F (10 ° C), the oxidation rate of grease doubled. For example: a bearing in 250 ° F (120 ° C) operation; and a bearing in 150 ° F (65 ° C) operation compared to the former grease add frequency is usually 10 times the latter.
High-temperature operation requires higher grease addition frequency of needle roller bearings; high-temperature grease can reduce the frequency.
Environmental conditions: if the bearing in a polluted environment operation, it is necessary to increase the grease frequency.
Ensure that the lubrication report points out any abnormal conditions, such as: bearing high temperature, noise, vibration or leakage situation.
