The more often you use it the better. The operator becomes accustomed to what he hears and this allows him to pick up any concerns earlier. Ideally it is used on the normal PM greasing schedule which, for us is weekly.
The UltraLube allows you to hear the bearing as you grease it. There is a basic procedure to follow when using this gear.
1) Listen to the bearing, what noise is it making, a rough scratchy or smooth sound?
2) Give the bearing a shot of grease, does the bearing noise change, does it get quieter or does it stay the same?
3) If there is no change then the bearing doesn't need any further greasing.
The frequency for greasing would differ depending on application, environment, type of grease, etc. There would be no reason to increase the frequency of your greasing schedule just because your using the UltraLube.
There is info on there website at
UVLM that may be of assistance. The unit I have has just had the coupling probe replaced after 9 years of use, this is the first thing to go wrong with it.