Many bearing manufacturers will recommend specific greases for your bearing, though sometimes the recommended grease may not be right for your application. Other problems can occur when exact bearing types are hard to identify and specify. Often, as in the case with Kyodo Yushi’s Multitemp LRL No. 3 and Kluber’s ISOFLEX NBU 15, each grease provides uses for similar functions although they are made of different materials and perform differently in different environments. Please see the table below to help identify the typical applications that two of the more common bearing greases cover. Prior to grease selection, the following parameters are usually analyzed or calculated: operating temperature, base oil viscosity, and speed.
A common and costly problem in grease application comes from over-greasing bearings. Over-greasing bearings can lead to abnormally high operating temperatures, damaged seals, and in some cases, such as electric motors, energy complications, and failure. Steer clear of this common problem by following proper and recommended grease amounts and by greasing on regularly scheduled preventative maintenance system (PMS). Under-greasing a bearing may also impact the life of your bearing. Applying lower than the recommended amount of grease may increase temperatures and metal contact, damaging the bearing through extreme wear. Spikes in noise levels and higher than normal temperature readings are good indications of having under-greased your bearing and could lead to bearing failure.
Here are some of the most common grease application amounts for Nachi TAB (ball screw support) bearings below:
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