WHY IS W SUCH A LIGHTNING ROD?
Okay, I have the first part of this down (I think) but what is this about grants and donations?
For all applications bearings are chosen based on speed, load rating, expected life, compatibility with the operating environment, and cost. According to you, it's spherical roller bearings for crushers.
A good time to change your smoke detector batteries is when you change the clock for daylight savings time. So about every 6 months. Also, remember to have one in each bedroom and at least one for each floor and don't forget about the basement.
I was taught to change it when we change our clocks so that would be 2xs a year.
